GOHEALTHCARE MSK SPECIALTY PROCEDURE LIBRARY™

Shoulder Replacement

Operational, Documentation, Medical Necessity, and Prior Authorization
Guide for MSK Specialty Practices, ASCs, Hospital Outpatient
Departments, and Hospitals

Document Profile

Attribute	Detail
Procedure	Shoulder Replacement (glenohumeral arthroplasty: hemiarthroplasty, anatomic total shoulder arthroplasty, and revision arthroplasty)
Library	GoHealthcare MSK Specialty Procedure Library™
Standard	GoHealthcare Clinical Procedure Guide Standard v1.0
Specialty	Orthopedic Surgery · Shoulder Reconstruction
Primary CPT® codes	23470 (hemiarthroplasty); 23472 (total shoulder); 23473 / 23474 (revision); 23334 / 23335 (prosthesis removal)
Regulatory context	CY2026 OPPS/ASC Final Rule — CMS began phasing out the Medicare Inpatient Only list effective 01/01/2026
Setting	Hospital Inpatient (POS 21) · Hospital Outpatient (POS 22) · Ambulatory Surgery Center (POS 24)
Version / Date	1.0 · July 2026 (two-pass code audit applied at authoring)
Author	Pinky Maniri, MSc, CRCR, CSAPM, CSPPM, CSBI, CSPR, CSAF · Certified in Healthcare A.I. Governance · Founder & Chief Executive Officer, GoHealthcare Practice Solutions

Contents

1. Evidence at a Glance2. Overview3. Relevant Anatomy (High-Level Overview)4. Clinical Indications5. Patient Selection6. Contraindications7. Conservative Treatment Requirements8. Imaging Requirements9. Medical Necessity10. Medicare Coverage & the CY2026 Regulatory Shift11. Commercial Payer Comparison12. Prior Authorization Workflow13. Documentation Requirements14. Common Prior Authorization Denials15. Appeal Strategies16. Coding & Billing Overview17. Implants, Devices, and System Considerations18. Clinical Documentation Checklist (Operative Note)19. Procedure Comparison20. GoHealthcare Clinical Insights21. GoHealthcare Leadership Perspective22. GoHealthcare Prior Authorization Insight23. GoHealthcare Case Study24. GoHealthcare Best Practices25. Common Mistakes26. Pearls and Pitfalls27. Frequently Asked Questions28. Key Takeaways29. Future Outlook30. References31. Reading Recommendations32. Related GoHealthcare Resources (Internal Links)33. Recommended Downloads34. Visual Recommendations35. Document History36. Educational Disclaimer

1

Evidence at a Glance

Shoulder replacement is the shoulder procedure most affected by the current regulatory environment. Coverage of the procedure itself is well established; the operational risk in 2026 has shifted almost entirely to site of service. CMS finalized elimination of the Medicare Inpatient Only (IPO) list beginning January 1, 2026, and total shoulder arthroplasty has already migrated substantially to the ambulatory surgery center setting. Authorization teams must now defend not only whether the procedure is necessary, but where it is performed.

Domain	Summary
Medicare NCD	No National Coverage Determination specific to shoulder arthroplasty. General "reasonable and necessary" standard applies (Social Security Act 1862(a)(1)(A)).
Medicare LCD / MAC	No dedicated national LCD. Traditional fee-for-service Medicare does not require prior authorization; medical review and site-of-service review apply.

Domain	Summary
IPO list status	CMS finalized elimination of the Inpatient Only list in the CY2026 OPPS/ASC Final Rule (issued 11/21/2025), phased over three years with full elimination by 01/01/2029. For CY2026, 285 procedures — predominantly musculoskeletal — were removed.
ASC status	Total shoulder arthroplasty (23472) and hemiarthroplasty (23470) were added to the Medicare ASC Covered Procedures List effective 01/01/2024. ASC share of total shoulder arthroplasty has since risen from under 10 percent to over 30 percent.
Commercial coverage	Broadly covered for end-stage glenohumeral arthritis failing conservative care. Managed via eviCore CMM-318, Carelon Joint Surgery, Cohere, Evolent/NIA CG-317, and TurningPoint.
Prior authorization	Required by essentially all commercial plans and Medicare Advantage. The arthroplasty code family appears on every vendor PA list reviewed.
Evidence level	Strong. Anatomic total shoulder arthroplasty is a well-established, high-satisfaction procedure for end-stage glenohumeral osteoarthritis with an intact, functional rotator cuff.
Imaging	Radiographs are the baseline. CT is standard for glenoid morphology, version, and bone stock, and increasingly drives implant planning; MRI where rotator cuff integrity is in question.
Conservative therapy	Documented non-operative care is expected, typically including activity modification, NSAIDs or analgesics, physical therapy, and injection where appropriate.
Critical selection factor	Rotator cuff integrity. An intact, functional cuff supports anatomic total shoulder arthroplasty; an irreparable or deficient cuff directs the patient toward reverse arthroplasty (see companion guide).
Typical approval driver	Radiographically confirmed end-stage glenohumeral arthritis, documented functional impairment, failed dated conservative care, and a documented rotator cuff assessment supporting the implant type selected.

2

Overview

Shoulder replacement resurfaces or replaces the arthritic glenohumeral joint with prosthetic components. In hemiarthroplasty, only the humeral side is replaced. In anatomic total shoulder arthroplasty, both the proximal humerus and the glenoid are replaced, restoring native joint architecture. A third configuration, reverse total shoulder arthroplasty, inverts the ball-and-socket relationship and is addressed in a companion guide — though, as discussed below, it shares a CPT® code with the anatomic procedure.

Operationally, shoulder replacement is a high-cost, implant-intensive, prior-authorization-mandatory procedure in a period of unusual regulatory movement. Two forces dominate: the elimination of the Medicare Inpatient Only list, which has opened outpatient and ASC pathways while creating new denial exposure for inpatient claims; and NCCI bundling that folds several commonly performed concurrent procedures into the arthroplasty code.

The code that surprises people

CPT® 23472 covers both anatomic AND reverse total shoulder arthroplasty. The implant configuration does not change the code reported. Both require replacement of the glenoid and the proximal humerus in the same operative session. Hemiarthroplasty — humeral side only — is 23470, not 23472. This single-code structure means the CPT® alone never tells a payer or an analyst which procedure was performed; the operative note and the implant record must.

3

Relevant Anatomy (High-Level Overview)

• Glenohumeral joint: the articulation of the humeral head with the glenoid fossa of the scapula — the joint replaced in shoulder arthroplasty.

• Proximal humerus: the humeral head and tuberosities; the humeral component is seated in the metaphysis and, depending on implant design, the diaphysis.

• Glenoid: the shallow scapular socket. Its version, inclination, and bone stock determine whether and how a glenoid component can be implanted, and are the principal drivers of preoperative CT planning.

• Rotator cuff: the decisive selection variable. Anatomic total shoulder arthroplasty depends on a functioning cuff to center the humeral head; a deficient cuff produces early failure and directs the patient toward a reverse configuration.

• Deltoid: the principal motor of the shoulder and, in reverse configurations, the primary power source — making deltoid function a documented selection criterion.

• Glenoid bone loss and wear patterns: asymmetric posterior glenoid wear is common in osteoarthritis and influences implant choice, augmentation, and operative complexity.

4

Clinical Indications

• End-stage primary glenohumeral osteoarthritis with pain and functional limitation refractory to non-operative care — the principal indication for anatomic total shoulder arthroplasty.

• Post-traumatic glenohumeral arthritis.

• Inflammatory arthropathy of the glenohumeral joint (for example, rheumatoid arthritis) with joint destruction.

• Avascular necrosis / osteonecrosis of the humeral head, where hemiarthroplasty may be considered if the glenoid is preserved.

• Selected proximal humeral fractures and fracture sequelae not amenable to fixation.

• Failed prior shoulder arthroplasty requiring revision (component wear, loosening, instability, or malposition).

• Note: cuff tear arthropathy and massive irreparable cuff tears are indications for reverse arthroplasty rather than anatomic replacement, and are addressed in the companion guide.

5

Patient Selection

Variable	Why it matters operationally
Rotator cuff integrity	The single most important documented variable. An intact, functional cuff supports anatomic TSA; deficiency redirects to reverse. Payers expect an explicit statement, not silence.
Radiographic disease severity	Joint space narrowing, osteophytes, subchondral sclerosis and cysts. "Pain with mild radiographic change" is a predictable denial.
Glenoid bone stock and version	CT-based assessment supports implant selection and augmentation; increasingly expected in the record for complex glenoids.
Functional impairment	Effect on ADLs, sleep, work, and range of motion — the substance of medical necessity.
Failed conservative care	Dated trial with documented outcome.
Site-of-service suitability	Comorbidities, anesthesia risk, home support, and distance from care now bear directly on whether an inpatient stay is defensible. This is new operational territory.
Surgical candidacy	Medical optimization, infection risk, and ability to participate in rehabilitation.

6

Contraindications

• Active local or systemic infection.

• Deltoid or axillary nerve dysfunction precluding a functional outcome.

• Insufficient glenoid bone stock to support a glenoid component — a contraindication to the anatomic procedure that may redirect to hemiarthroplasty or a reverse configuration.

• Irreparable rotator cuff deficiency, which contraindicates anatomic total shoulder arthroplasty specifically.

• Neuropathic (Charcot) arthropathy.

• Medical instability precluding safe anesthesia and surgery.

• Inability or unwillingness to participate in post-operative rehabilitation.

• Radiographically mild disease where the imaging does not support end-stage arthritis.

7

Conservative Treatment Requirements

Element	What payers look for
Duration	A documented, dated non-operative trial. Requirements vary by vendor and plan; capture start and end dates rather than a general assertion.
Physical therapy	A structured program with dates, frequency, and functional response.
Pharmacologic care	NSAIDs or analgesics as tolerated, with activity modification and joint-conservation counseling now referenced in 2026 UM policy language.
Injection	Intra-articular glenohumeral corticosteroid injection where clinically appropriate, with documented response and date.
Recognized exceptions	Acute displaced proximal humeral fracture, tumor, infection, and failed prior arthroplasty are not subject to the standard elective conservative-care pathway. Label such requests explicitly.
Documented failure	A statement that conservative care was completed and failed to provide durable relief, with the functional deficit that persists.

8

Imaging Requirements

• Radiographs are the baseline and the primary evidence of end-stage disease: joint space narrowing, osteophytes, subchondral sclerosis and cysts, and humeral head migration.

• CT is standard for glenoid version, inclination, wear pattern, and bone stock, and underpins implant planning and augmented-component selection.

• MRI where rotator cuff integrity is uncertain — the finding that determines anatomic versus reverse configuration.

• Proximal humeral migration on radiographs suggests cuff deficiency and should be addressed explicitly in the request, since it undercuts an anatomic TSA rationale.

• The authorization request should quote the radiographic sentence establishing end-stage arthritis and the cuff assessment supporting the planned implant type.

9

Medical Necessity

Pillar	Documentation that demonstrates it
Radiographic severity	Imaging describing end-stage glenohumeral arthritis, quoted directly.
Functional impairment	Pain scores, range of motion, and effect on ADLs, sleep, and work.
Conservative care	Dated trial with documented outcome, or a stated exception (fracture, tumor, infection, failed arthroplasty).
Rotator cuff assessment	Explicit statement of cuff integrity supporting the implant configuration selected.

Pillar	Documentation that demonstrates it
Site of service rationale	Where inpatient admission is planned, the clinical rationale — comorbidities, anesthesia risk, expected recovery needs — documented prospectively.

10

Medicare Coverage & the CY2026 Regulatory Shift

This section carries the most consequential operational change in the shoulder service line and should be read by revenue cycle leadership as well as authorization staff.

Coverage basics

• No NCD and no dedicated national LCD govern shoulder arthroplasty; coverage rests on the general reasonable-and-necessary standard with MAC medical review.

• Traditional Medicare requires no prior authorization for shoulder arthroplasty. Medicare Advantage plans generally do, and commonly delegate to eviCore, Carelon, Cohere, Evolent/NIA, or TurningPoint.

• Inpatient shoulder arthroplasty groups to MS-DRG 483 (Major Joint and Limb Reattachment Procedure of Upper Extremity with CC/MCC); other MS-DRGs may apply depending on the case.

Elimination of the Inpatient Only list

• In the CY2026 OPPS/ASC Final Rule issued November 21, 2025, CMS finalized elimination of the Medicare Inpatient Only list over a three-year transition, with full elimination by January 1, 2029.

• For CY2026, 285 procedures — predominantly musculoskeletal — were removed from the IPO list, identified in Table 132 of the final rule, and assigned to clinical APCs including a newly finalized Level 7 Musculoskeletal Procedures APC.

• CMS simultaneously revised the ASC Covered Procedures List review criteria and expanded the list substantially for CY2026.

• Total shoulder arthroplasty (23472) and hemiarthroplasty (23470) were added to the ASC Covered Procedures List effective January 1, 2024, ahead of this broader movement. ASC share of total shoulder arthroplasty has since risen from under 10 percent to over 30 percent.

What removal from the IPO list does and does not mean

CMS was explicit: removal of a procedure from the Inpatient Only list does not mean the procedure must be performed in an outpatient setting, and does not identify it as appropriate only for outpatient care. Physicians retain judgment over site of service, including admitting the patient when clinically warranted.

The operational risk runs the other direction. Once a procedure leaves the IPO list, Medicare no longer pays it automatically as an inpatient service by rule, and commercial payers and Medicare Advantage plans — most of which follow CMS billing conventions — are expected to steer these cases toward lower-cost settings and to scrutinize inpatient claims. Where inpatient admission is clinically appropriate, the surgeon must document the rationale prospectively: comorbidities, anesthesia risk, anticipated recovery needs, or other safety considerations. An inpatient claim supported only by habit is now a denial.

Practices should also expect status indicator and APC assignment changes in the CY2026 addenda for the removed codes, and should confirm coding and billing teams are working from current addenda rather than prior-year references.

11

Commercial Payer Comparison

Payer / vendor	How shoulder arthroplasty is managed (summary)
eviCore by Evernorth	CMM-318 (Shoulder Arthroplasty / Replacement / Resurfacing / Revision / Arthrodesis) is the governing guideline, distinct from CMM-315 which covers arthroscopic and open non-arthroplasty shoulder surgery. The arthroplasty family appears as PA-required on eviCore joint code lists.
Carelon Medical Benefits Mgmt	Joint Surgery guideline and Musculoskeletal Program code list carry 23470, 23472, 23473, and 23474.
Cohere Health	MSK surgical authorization platform used by several plans including Humana lines; conservative care, radiographic severity, and cuff assessment are the determinative fields.

Payer / vendor	How shoulder arthroplasty is managed (summary)
Evolent / NIA	Shoulder Arthroplasty guideline NIA CG 317 — note this is a different guideline number from the _ _ shoulder arthroscopy guideline (CG 318). Its code groups distinguish partial _ arthroplasty/hemiarthroplasty (23470) from revision arthroplasty (23473, 23474).
TurningPoint	Delegated surgical PA on many plans, with 2026 MSK policy updates affecting non-operative treatment requirements across shoulder procedures.
UnitedHealthcare	The "Surgery of the Shoulder" commercial and individual exchange medical policy addresses the arthroplasty code family including 23470, 23472, and 23473.
HealthHelp	Administers PA for certain Blue Cross Blue Shield plans and lists the arthroplasty family as PA-required.
Aetna / Cigna / Humana / BCBS plans	Each maintains shoulder policy or delegates to a vendor; Cigna managed lines run through eviCore CMM-318. Verify vendor and current PA list per plan, per cycle.
Payer guideline currency eviCore's February 2026 policy update records that CMM-318 was revised with no clinically impactful changes in that cycle, alongside CMM-312 and CMM-314. By contrast CMM-311 (Knee Replacement), CMM-313 (Hip Replacement), and CMM-315 (Shoulder Surgery — Arthroscopic and Open Procedures) were revised with clinical changes that LIMIT coverage, effective 03/07/2026. Practices performing both arthroplasty and non-arthroplasty shoulder surgery should note that the arthroscopic guideline tightened even though the arthroplasty guideline did not. The Cigna commercial editions carry an effective date of 08/04/2026. Confirm the version in force at the time of service.

12

Prior Authorization Workflow

• 1. Eligibility & vendor identification. Confirm which entity holds surgical PA and note that arthroplasty may run under a different guideline number than arthroscopy for the same vendor.

• 2. Assemble radiographic evidence. Quote the imaging sentence establishing end-stage glenohumeral arthritis.

• 3. Document rotator cuff status explicitly. This determines the implant configuration and is frequently the missing element.

• 4. Compile dated conservative care with outcomes, or state a recognized exception.

• 5. Determine and justify site of service. With the IPO list phasing out, prospectively document the rationale for inpatient admission where planned, or confirm the outpatient/ASC pathway is appropriate.

• 6. Verify facility authorization separately. The professional and facility claims are distinct, and the ASC must independently confirm coverage and implant economics.

• 7. Map anticipated codes, including any concurrent procedures — and confirm which are bundled (see coding section).

• 8. Submit, track, confirm. Record authorization number, approved codes, approved site of service, and validity window.

13

Documentation Requirements

• Pain score, duration, and functional impairment (ADLs, sleep, work, range of motion)

• Objective range of motion, active and passive, versus the contralateral side

• Radiographic findings quoted, establishing end-stage glenohumeral arthritis

• CT findings on glenoid version, inclination, wear pattern, and bone stock where obtained

• Explicit rotator cuff integrity assessment and the implant configuration it supports

• Dated conservative treatment history with documented outcome, OR a stated exception

• Deltoid and axillary nerve function

• Laterality clearly documented

• Prior ipsilateral shoulder surgery or arthroplasty, with implant details if revision

• Medical optimization and anesthesia clearance

• Site-of-service determination with clinical rationale where inpatient admission is planned

• Anticipated code combination, with bundled concurrent procedures identified

14

Common Prior Authorization Denials

Denial reason	Root cause / prevention
Radiographic severity insufficient	Imaging shows mild or moderate change while the request asserts end-stage disease. Prevention: quote the radiographic findings verbatim.
Conservative care not documented	No dated trial. Prevention: capture dates and outcomes, or state a recognized exception.
Rotator cuff status not addressed	Anatomic TSA requested with no cuff assessment, or with imaging suggesting deficiency. Prevention: state cuff integrity explicitly and tie it to the implant chosen.
Site-of-service denial	Inpatient admission requested or billed without prospective clinical rationale following IPO removal. Prevention: document comorbidities, anesthesia risk, and recovery needs before surgery.
Facility authorization mismatch	Professional side authorized, facility or ASC not. Prevention: verify both, and confirm the approved site matches the scheduled site.
Concurrent procedure denied as bundled	Biceps tenodesis or fracture treatment billed with arthroplasty. Prevention: understand NCCI bundling before submission (see coding section).
Revision request without failure documentation	Revision requested without documenting the mode of failure. Prevention: document loosening, wear, instability, malposition, or infection with imaging correlation.

15

Appeal Strategies

• Answer the specific criterion cited; arthroplasty criteria are itemized and respond well to point-by-point rebuttal.

• For radiographic-severity denials, supply the full radiology report and, where available, the CT assessment — a narrative impression rarely overturns the denial.

• For cuff-related denials, supply the cuff assessment and explain why the selected configuration is appropriate; if the cuff is deficient, the correct response is often a revised plan toward reverse arthroplasty rather than an appeal.

• For site-of-service denials, supply the prospectively documented clinical rationale for admission. Retrospective justification is materially weaker and is the central reason to document before surgery.

• For bundling denials, verify the current NCCI edit and modifier indicator before appealing — several commonly contested pairs are correctly bundled and are not winnable.

• Preserve internal and external appeal deadlines; medical-necessity disputes qualify for independent external review.

16

Coding & Billing Overview

Operational overview for authorization and revenue-cycle teams. Descriptors verified against published CPT® code lists including current eviCore joint code lists, and ICD-10-CM FY2026. Detailed reimbursement methodology, payment rates, and APC assignment belong in the GoHealthcare Revenue Cycle Knowledge Center.

Arthroplasty Code Family (verified descriptors)

CPT®	Descriptor	Operational notes
23470	Arthroplasty, glenohumeral joint; hemiarthroplasty	Humeral side only. Added to the Medicare ASC Covered Procedures List effective 01/01/2024.
23472	Arthroplasty, glenohumeral joint; total shoulder (glenoid and proximal humeral replacement (eg, total shoulder))	Covers BOTH anatomic and reverse total shoulder arthroplasty. Requires replacement of both the glenoid and the proximal humerus in the same session. Added to the ASC Covered Procedures List effective 01/01/2024.
23473	Revision of total shoulder arthroplasty, including allograft when performed; humeral or glenoid component	Revision of ONE component. Allograft is included in the descriptor — do not report separately.
23474	Revision of total shoulder arthroplasty, including allograft when performed; humeral and glenoid component	Revision of BOTH components. Allograft included.
23334	Removal of prosthesis, includes debridement and synovectomy when performed; humeral or glenoid component	Prosthesis removal without reimplantation (for example, first stage of a two-stage infection protocol). Debridement and synovectomy are INCLUDED.
23335	Removal of prosthesis, includes debridement and synovectomy when performed; humeral and glenoid components (eg, total shoulder)	Removal of both components. Debridement and synovectomy INCLUDED.

Bundling: A Documented Global Service Data / NCCI Conflict

As with the labral family, published authorities disagree, and practices must know which rule their payer follows. Per AAOS guidance published in November 2025, biceps tenodesis (23430) is not included with the shoulder replacement code under the AAOS Global Service Data, but is bundled with 23472 under NCCI edits. The practical consequence is direct: biceps tenodesis cannot be reported with total shoulder arthroplasty for Medicare and for all carriers that follow NCCI.

Code pair	Status	Operational consequence
23472 + 23430	Bundled under NCCI; NOT bundled under AAOS Global Service Data	Do not report biceps tenodesis with TSA for Medicare or NCCI-following carriers. Attempting to substitute a muscle-transfer code to circumvent the edit is not appropriate coding.
23472 + 23615	Bundled under NCCI	Open treatment of a proximal humeral fracture is a component of 23472 under NCCI when performed in the same session.
23470 vs 23472	Mutually exclusive	Hemiarthroplasty and total shoulder arthroplasty describe different procedures on the same joint and are not reported together for the same shoulder.
Currency warning NCCI PTP edits and their modifier indicators are republished quarterly. A pair that was separately reportable in a prior quarter may not be in the current one, and the reverse is also true — NCCI has unbundled shoulder pairs before. Verify the active CMS edit files rather than relying on cached tables, vendor coding guides, or society publications, all of which lag. This applies with particular force to arthroplasty, where a single bundled pair can represent substantial value.

Common ICD-10-CM Diagnosis Codes (FY2026, verified)

ICD-10-CM	Description	Coding note
M19.011 / M19.012	Primary osteoarthritis, right / left shoulder	The principal indication code for elective anatomic TSA.
M19.111 / M19.112	Post-traumatic osteoarthritis, right / left shoulder	Where arthritis follows documented prior trauma.
M19.211 / M19.212	Secondary osteoarthritis, right / left shoulder	Arthritis secondary to another documented condition.
M87.021 / M87.022	Idiopathic aseptic necrosis of right / left humerus	Osteonecrosis of the humeral head; supports hemiarthroplasty where the glenoid is preserved.
M75.121 / M75.122	Complete rotator cuff tear or rupture, right / left, not specified as traumatic	Presence redirects toward reverse configuration; document the cuff finding either way.
S42.2- family	Fracture of upper end of humerus	The correct family for proximal humeral fracture indications. Select the specific code, laterality, and 7th character.
Z96.611 / Z96.612	Presence of right / left artificial shoulder joint	Status code for the revision and post-arthroplasty context. NOT acceptable as a principal diagnosis.
T84.0- family	Mechanical complication of internal joint prosthesis	The revision driver — loosening, wear, dislocation, malposition, breakage. ICD-10-CM instructs an additional code to identify the joint (Z96.6-). Select the specific code and 7th character.
M25.511 / M25.512	Pain in shoulder, right / left	Non-specific; never the sole support for arthroplasty.

Modifiers, Place of Service, and Facility Considerations

Item	Guidance
RT / LT	Laterality; append per payer requirement.
22	Increased procedural services; requires substantial operative-note support and is scrutinized on high-value procedures.
59 / X{EPSU}	Distinct procedural service. Verify the current NCCI modifier indicator before use — a CCMI of 0 means no documentation will unlock separate payment.
AS / 80 / 81 / 82	Assistant-at-surgery, when documented and supported.
POS 21 / 22 / 24	Inpatient / on-campus hospital outpatient / ASC. With the IPO list phasing out, all three are now realistic pathways and the authorization must match the rendered setting.
Facility vs professional	Separate claims. Implants are not separately reported on the physician claim; facility implant economics are governed by contracts and reporting rules and materially affect ASC feasibility.

17

Implants, Devices, and System Considerations

Shoulder arthroplasty is the most implant-intensive procedure in this batch, and implant cost is the dominant variable in ASC feasibility. Principal manufacturers include Stryker, Zimmer Biomet, DePuy Synthes, Arthrex, Smith+Nephew, Exactech, and Enovis/DJO. Operationally relevant points:

• CPT® does not vary by manufacturer or implant design. Stemmed, stemless, and augmented configurations all report under the same arthroplasty code.

• Stemless and short-stem humeral components are increasingly used and may affect operative time and revision strategy, but do not create a separate code.

• Augmented glenoid components address asymmetric glenoid wear; their selection is driven by the CT assessment that should already be in the record.

• Patient-specific instrumentation and preoperative planning software are widely used. Where a planning or navigation technology is billed separately, confirm the correct code and the payer's coverage position pre-service — do not assume it is included in the arthroplasty code or separately payable.

• Implant cost drives site of service. An ASC may be clinically appropriate and economically infeasible for a given implant construct; facility and surgeon should align on implant selection before the site is confirmed.

• Revision constructs including allograft are contemplated within 23473 and 23474 by descriptor; do not report allograft separately.

• For any novel implant or adjunct technology, verify FDA status, coding, and payer coverage as three independent determinations.

18

Clinical Documentation Checklist (Operative Note)

• Laterality and approach

[ ] Configuration performed: hemiarthroplasty, anatomic total, or reverse total — stated explicitly, since 23472 does not distinguish anatomic from reverse

• Components implanted, with manufacturer, type, and size

• Glenoid preparation, version correction, and any augmentation

• Rotator cuff status as encountered intra-operatively

• Subscapularis management technique

• Any concurrent procedure performed, with recognition of which are bundled under NCCI

• For revision: mode of failure, components removed, components retained, and any allograft used

• For prosthesis removal: whether debridement and synovectomy were performed (included in 23334/23335)

• Findings supporting the reported diagnosis code and laterality

19

Procedure Comparison

Pathway	Typical patient	Code	Authorization emphasis
Hemiarthroplasty	Humeral-side disease, preserved glenoid; osteonecrosis; selected fracture	23470	Rationale for not replacing the glenoid
Anatomic total shoulder	End-stage OA with intact, functional rotator cuff	23472	Radiographic severity + documented cuff integrity
Reverse total shoulder	Cuff tear arthropathy, irreparable cuff, selected fracture	23472 (same code)	Cuff deficiency + deltoid function (companion guide)
Revision, one component	Isolated component failure	23473	Mode of failure documented
Revision, both components	Global failure	23474	Mode of failure documented

Pathway	Typical patient	Code	Authorization emphasis
Prosthesis removal	Infection, two-stage protocol	23334 / 23335	Infection documentation; staged plan
Non-arthroplasty options	Earlier-stage disease	Arthroscopic codes	Different guideline family (CMM-315)

20

GoHealthcare Clinical Insights

Operational recommendations from MSK authorization practice

• Add a mandatory rotator cuff status field to the arthroplasty intake template. Its absence is the most common substantive gap in anatomic TSA requests.

• Quote radiographic findings verbatim; "advanced arthritis" in a referral letter is not the same as a radiology report describing joint space loss and osteophytes.

• Treat site of service as a documented clinical decision, not a scheduling default. With the IPO list phasing out, an inpatient admission needs a prospectively recorded rationale.

• Verify facility and professional authorization separately, and confirm the approved site matches the scheduled site — a mismatch is now a live denial risk in both directions.

• Have the ASC confirm implant economics before the site is finalized; clinical appropriateness and facility feasibility are different questions.

• Check the current-quarter NCCI edit before billing any concurrent procedure with arthroplasty, rather than relying on a vendor coding guide.

• For revision requests, lead with the mode of failure; "failed arthroplasty" without a mechanism pends predictably.

21

GoHealthcare Leadership Perspective

Executive view: the site-of-service era

For most of the past decade, shoulder arthroplasty authorization was a medical-necessity question with a settled answer. The CY2026 elimination of the Inpatient Only list changes the nature of the work. The question is no longer only whether the joint should be replaced, but where — and that question now carries denial risk in both directions. An inpatient claim without prospective clinical rationale is exposed; an ASC case scheduled without implant-economics verification is exposed differently.

Total shoulder arthroplasty is the leading indicator here. It joined the ASC Covered Procedures List two years ahead of the broader IPO phase-out and has already moved from under 10 percent to over 30 percent ASC share. Organizations that treated that migration as a scheduling change rather than a governance change absorbed the denials. The service lines that performed best built three capabilities: a prospective site-of-service determination documented in the chart, dual professional and facility authorization verification, and an implant-cost check integrated into site selection. Those same three capabilities will be tested across roughly 1,400 more procedures as the IPO list continues to phase out through January 2029.

22

GoHealthcare Prior Authorization Insight

What we see that payer policies do not spell out

• 23472 does not tell anyone whether the shoulder was anatomic or reverse. Your operative note and implant log are the only record. This matters for registries, outcomes analysis, and revision planning.

• Rotator cuff status is the hinge. Payers reading an anatomic TSA request look for it; silence reads as an unexamined selection decision.

• Site of service is the new medical necessity. Document the admission rationale before surgery — retrospective justification is materially weaker.

• The 23472/23430 bundle is not winnable under NCCI. AAOS Global Service Data disagrees, but for Medicare and NCCI-following carriers, biceps tenodesis is not separately reportable with TSA.

• Substituting a different code to escape a bundle is not a coding strategy. Where a tenodesis is bundled, reporting a muscle-transfer code instead is inappropriate.

• Check NCCI quarterly. Arthroplasty pairs carry enough value that a stale edit table is expensive.

• Revision denials are usually documentation denials. Name the mode of failure and correlate it to imaging.

23

GoHealthcare Case Study

Educational scenario — details are illustrative and do not identify any actual patient or organization.

Clinical Scenario

A 71-year-old patient with a two-year history of progressive right shoulder pain, night pain, and loss of external rotation presents after failed physical therapy, NSAIDs, and two intra-articular injections. Radiographs demonstrate advanced glenohumeral joint space loss with inferior osteophytes and subchondral sclerosis. CT shows posterior glenoid wear with adequate bone stock. MRI documents an intact rotator cuff. The surgeon plans an anatomic total shoulder arthroplasty with an augmented glenoid component, and the practice schedules the case as an inpatient admission by long-standing habit.

Documentation Challenges

The authorization packet was strong on arthritis severity but did not state the rotator cuff finding, and contained no rationale for inpatient admission. The ASC option was never evaluated. Separately, the surgeon intended to perform a biceps tenodesis for concurrent biceps pathology and the practice planned to bill it alongside the arthroplasty.

Prior Authorization and Reimbursement Barriers

The Medicare Advantage plan pended the request for documentation of rotator cuff integrity supporting an anatomic configuration. It further questioned the inpatient site of service, noting that the procedure is no longer inpatient-only and is payable in the outpatient and ASC settings. Had the biceps tenodesis been billed with the arthroplasty, it would have been denied as a component of 23472 under NCCI.

Payer Considerations

The plan followed CMS conventions on site of service and applied its arthroplasty guideline requiring documented cuff assessment. It did not dispute the medical necessity of the arthroplasty itself.

Resolution Strategy

• Added the MRI sentence documenting an intact rotator cuff and an explicit statement tying that finding to the anatomic configuration selected.

• Conducted a prospective site-of-service assessment. The patient's comorbidity profile and limited home support supported admission; the surgeon documented that rationale in the pre-operative note rather than leaving the setting unexplained.

• Confirmed facility authorization for the documented site of service alongside the professional authorization.

• Removed the biceps tenodesis from the anticipated billing, documenting the tenodesis in the operative note as performed but not separately reportable under NCCI.

Outcome

The arthroplasty was approved at the documented site of service without a peer-to-peer. The claim matched the authorization, and no post-payment bundling adjustment arose because the tenodesis was never billed separately.

Lessons Learned

• Rotator cuff status is not optional documentation in an anatomic TSA request; it is the selection rationale.

• Site of service must be decided and documented prospectively now that the procedure is not inpatient-only.

• Knowing a bundle in advance converts a post-payment recoupment into a non-event.

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GoHealthcare Best Practices

• Require an explicit rotator cuff status field on every shoulder arthroplasty request.

• Quote radiographic findings verbatim rather than characterizing them.

• Perform and document a prospective site-of-service determination for every arthroplasty case.

• Verify professional and facility authorization separately and confirm both match the scheduled setting.

• Integrate an implant-cost check into ASC site selection.

• Check current-quarter NCCI edits before billing any concurrent procedure with arthroplasty.

• Document the mode of failure on every revision request.

• Track the IPO phase-out schedule through January 2029 and update site-of-service pathways each cycle.

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Common Mistakes

• Reporting 23472 for a hemiarthroplasty — humeral-side-only replacement is 23470.

• Assuming 23472 distinguishes anatomic from reverse arthroplasty; it does not.

• Billing biceps tenodesis (23430) with total shoulder arthroplasty for Medicare or NCCI-following carriers.

• Substituting a muscle-transfer code to circumvent the tenodesis bundle.

• Reporting open proximal humeral fracture treatment (23615) separately with 23472 in the same session.

• Reporting allograft separately with 23473 or 23474, which include it by descriptor.

• Reporting debridement or synovectomy separately with 23334 or 23335, which include them by descriptor.

• Admitting as an inpatient without prospectively documented clinical rationale now that the procedure is off the IPO list.

• Using Z96.611 or Z96.612 as a principal diagnosis — these status codes are not acceptable as principal.

• Relying on prior-year OPPS/ASC addenda or vendor coding guides for status indicators after the CY2026 changes.

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Pearls and Pitfalls

Pearls	Pitfalls
State rotator cuff integrity explicitly.	Leaving the selection rationale unexplained.
Quote the radiology report verbatim.	Characterizing imaging as "advanced" without support.
Decide and document site of service prospectively.	Admitting by habit after IPO removal.
Verify facility and professional authorization separately.	Assuming one covers the other.
Check NCCI in the current quarter.	Trusting a vendor coding guide's bundling table.
Name the mode of failure on revisions.	Submitting "failed arthroplasty" with no mechanism.

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Frequently Asked Questions

Q1. What code reports a total shoulder arthroplasty? 23472 (Arthroplasty, glenohumeral joint; total shoulder (glenoid and proximal humeral replacement (eg, total shoulder))). It requires replacement of both the glenoid and the proximal humerus in the same operative session.

Q2. Does 23472 distinguish anatomic from reverse total shoulder arthroplasty? No. A single code covers both configurations, and the implant design does not change the code reported. The operative note and implant record are the only documentation of which procedure was performed.

Q3. What code reports a hemiarthroplasty? 23470 (Arthroplasty, glenohumeral joint; hemiarthroplasty), for humeral-side-only replacement. It is not reported with 23472 for the same shoulder.

Q4. How are revisions coded? 23473 for revision of the humeral OR glenoid component; 23474 for revision of the humeral AND glenoid components. Both include allograft when performed — do not report allograft separately.

Q5. What if the prosthesis is removed without reimplantation? 23334 (humeral or glenoid component) or 23335 (humeral and glenoid components). Both include debridement and synovectomy when performed.

Q6. Is shoulder arthroplasty still an inpatient-only procedure? No. Total shoulder arthroplasty and hemiarthroplasty were added to the Medicare ASC Covered Procedures List effective January 1, 2024, and CMS finalized elimination of the Inpatient Only list beginning January 1, 2026, phased over three years with full elimination by January 1, 2029.

Q7. Does removal from the Inpatient Only list mean the procedure must be outpatient? No, and CMS was explicit on this point. Removal does not identify a procedure as appropriate only for outpatient care, and the physician retains judgment over site of service. However, Medicare no longer pays it as inpatient by rule, and inpatient claims require documented clinical rationale.

Q8. What should support an inpatient admission? Prospectively documented clinical rationale: comorbidities, anesthesia risk, anticipated recovery needs, home support limitations, or other safety considerations. Retrospective justification is materially weaker.

Q9. How many procedures came off the IPO list for CY2026? 285, predominantly musculoskeletal, identified in Table 132 of the CY2026 OPPS/ASC Final Rule and assigned to clinical APCs including a newly finalized Level 7 Musculoskeletal Procedures APC.

Q10. Can biceps tenodesis be billed with total shoulder arthroplasty? Not for Medicare or carriers following NCCI. Per AAOS guidance published in November 2025, 23430 is not included with 23472 under AAOS Global Service Data, but IS bundled under NCCI edits — and NCCI governs for Medicare and NCCI-following payers.

Q11. Can open proximal humeral fracture treatment be billed with 23472? No. 23615 is bundled as a component of 23472 under NCCI when performed in the same session.

Q12. Does traditional Medicare require prior authorization? No. There is no NCD or dedicated LCD, and shoulder arthroplasty is not in the OPD prior-authorization program. Medicare Advantage plans generally do require prior authorization.

Q13. Which guideline governs shoulder arthroplasty at eviCore? CMM-318 (Shoulder Arthroplasty / Replacement / Resurfacing / Revision / Arthrodesis) — distinct from CMM-315, which covers arthroscopic and open non-arthroplasty shoulder surgery.

Q14. Which Evolent/NIA guideline applies? NIA_CG_317 for shoulder arthroplasty. Note this differs from NIA_CG_318, which covers shoulder arthroscopy — a common mix-up when locating the correct criteria.

Q15. Why is rotator cuff status so important? It determines implant configuration. An intact, functional cuff supports anatomic total shoulder arthroplasty; a deficient or irreparable cuff predicts early failure of an anatomic implant and directs the patient toward a reverse configuration.

Q16. What imaging is expected? Radiographs establishing end-stage arthritis are the baseline; CT for glenoid version, wear, and bone stock; MRI where cuff integrity is uncertain.

Q17. Which diagnosis code supports elective anatomic TSA? M19.011 (right) or M19.012 (left), primary osteoarthritis of the shoulder, is the principal indication code. Post-traumatic (M19.11-) and secondary (M19.21-) variants apply where documented.

Q18. How is a revision case coded diagnostically? The T84.0- family describes mechanical complication of an internal joint prosthesis; ICD-10-CM instructs an additional code to identify the joint from Z96.6-. Note that Z96.611/Z96.612 are not acceptable as a principal diagnosis.

Q19. Are implants separately reported by the physician? No. Implants are not separately reported on the physician professional claim, and the arthroplasty code does not vary by manufacturer or implant design. Facility implant reporting follows facility contracts and reporting rules.

Q20. Does implant cost affect the ASC decision? Materially. A case can be clinically appropriate for an ASC and economically infeasible for a given implant construct. Facility and surgeon should align on implant selection before confirming the site.

Q21. What are the most common avoidable denials? Missing rotator cuff assessment, characterized rather than quoted radiographic findings, undocumented inpatient site-of-service rationale, facility/professional authorization mismatch, and concurrent procedures billed against NCCI bundles.

Q22. Where does detailed reimbursement analysis belong? APC assignment, payment rates, fee schedules, NCCI/MUE tables, and revenue-cycle modeling belong in the GoHealthcare Revenue Cycle Knowledge Center, not in this operational guide.

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Key Takeaways

• 23472 covers both anatomic and reverse total shoulder arthroplasty; only the operative note distinguishes them.

• Hemiarthroplasty is 23470 and is not reported with 23472 for the same shoulder.

• Rotator cuff integrity is the selection hinge and must be documented explicitly.

• CMS finalized elimination of the Inpatient Only list beginning 01/01/2026, with full elimination by 01/01/2029; 285 mostly musculoskeletal procedures came off for CY2026.

• Shoulder arthroplasty joined the ASC Covered Procedures List effective 01/01/2024 and ASC share has already exceeded 30 percent.

• Site of service is now a documented clinical decision carrying denial risk in both directions.

• Biceps tenodesis (23430) and open proximal humeral fracture treatment (23615) are bundled into 23472 under NCCI, notwithstanding AAOS Global Service Data.

• 23473/23474 include allograft; 23334/23335 include debridement and synovectomy.

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Future Outlook

• The IPO phase-out continues through January 1, 2029, with roughly 1,400 additional procedures still to come off the list — site-of-service governance will remain a growing operational discipline.

• Expect commercial and Medicare Advantage plans to intensify site-of-service steerage as more procedures become ASC-eligible.

• ASC migration of shoulder arthroplasty will continue, making implant-cost management central to facility strategy.

• Pressure is likely to build for CPT® codes that distinguish anatomic from reverse arthroplasty, given the registry, outcomes, and payment-accuracy implications of a shared code.

• Stemless humeral components and augmented glenoids will continue to expand, without changing the code set.

• Preoperative planning and navigation technologies will raise recurring coding and coverage questions that must be verified case by case.

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References

• Centers for Medicare & Medicaid Services (CMS). CY2026 Hospital Outpatient Prospective Payment System and Ambulatory Surgical Center Payment System Final Rule (issued November 21, 2025), including Inpatient Only list phase-out and ASC Covered Procedures List revisions. Website: https://www.cms.gov

• Centers for Medicare & Medicaid Services (CMS). CY2026 OPPS Addenda, including Addendum B (payment by HCPCS code), Addendum D1 (status indicators), and Addendum E (inpatient-only procedures). Website: https://www.cms.gov/files/document/2026-nfrm-opps-addenda-table-contents.pdf

• Centers for Medicare & Medicaid Services (CMS). Medicare Coverage Database (NCDs, LCDs, Articles). Website: https://www.cms.gov/medicare-coverage-database

• Centers for Medicare & Medicaid Services (CMS). National Correct Coding Initiative (NCCI) Policy Manual and quarterly PTP edit files. Website: https://www.cms.gov/medicare/coding-billing/national-correct-coding-initiative-ncci-edits

• American Academy of Orthopaedic Surgeons (AAOS). AAOS Now, November 2025 — coding guidance on total shoulder arthroplasty, Global Service Data, and NCCI bundling of biceps tenodesis. Website: https://www.aaos.org/aaosnow/2025/nov/managing/managing01/

• American Medical Association. Current Procedural Terminology (CPT®) and CPT® Assistant. Website: https://www.ama-assn.org

• eviCore by Evernorth. Comprehensive Musculoskeletal Management Guideline CMM-318 (Shoulder Arthroplasty / Replacement / Resurfacing / Revision / Arthrodesis) and joint surgery code lists. Website: https://www.evicore.com

• Carelon Medical Benefits Management. Joint Surgery Clinical Guideline and Musculoskeletal Program CPT® Codes and Descriptions. Website: https://guidelines.carelonmedicalbenefitsmanagement.com

• Evolent / National Imaging Associates. Shoulder Arthroplasty Clinical Guideline (NIA_CG_317). Website: https://www.evolent.com

• TurningPoint Healthcare Solutions. Musculoskeletal Medical Policies and 2026 Updates. Website: https://www.myturningpoint-healthcare.com

• UnitedHealthcare. Surgery of the Shoulder — Commercial and Individual Exchange Medical Policy. Website: https://www.uhcprovider.com

• American Shoulder and Elbow Surgeons (ASES). Coding and Reimbursement guidance. Website: https://ases-assn.org/about-ases/coding-reimbursement/

• U.S. National Center for Health Statistics / CMS. ICD-10-CM (FY2026) Official Code Set. Website: https://www.cms.gov/medicare/coding-billing/icd-10-codes

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Reading Recommendations

• CY2026 OPPS/ASC Final Rule, particularly Table 132 (procedures removed from the IPO list) and the ASC Covered Procedures List revisions.

• Current CY2026 OPPS addenda for status indicators and APC assignments on the removed codes.

• AAOS Now coding guidance on total shoulder arthroplasty and Global Service Data versus NCCI.

• Current eviCore CMM-318 and Evolent/NIA CG-317 guideline documents (verify version and effective date).

• NCCI Policy Manual Chapter 4 and the current quarterly PTP edit files.

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Related GoHealthcare Resources (Internal Links)

• GoHealthcare MSK Specialty Procedure Library™ — Reverse Shoulder Arthroplasty (companion guide).

• GoHealthcare MSK Specialty Procedure Library™ — Shoulder Arthroscopy, Rotator Cuff Repair, and Labral Repair (companion guides).

• GoHealthcare Revenue Cycle Knowledge Center — APC assignment, payment rates, NCCI/MUE, and site-of-service financial modeling.

• GoHealthcare Prior Authorization Playbooks and payer-policy watch. Website: https://www.gohealthcarellc.com

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Recommended Downloads

• Shoulder Arthroplasty Prior Authorization Checklist (with mandatory rotator cuff status field).

• Prospective Site-of-Service Determination Worksheet (post-IPO-elimination).

• Dual Professional / Facility Authorization Verification Form.

• Revision Arthroplasty Mode-of-Failure Documentation Template.

• Quarterly NCCI Edit Check Log for arthroplasty code pairs.

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Visual Recommendations

• High-level glenohumeral anatomy with anatomic versus reverse implant configuration comparison.

• Decision tree: rotator cuff integrity driving anatomic versus reverse selection.

• Site-of-service decision pathway following IPO list elimination.

• IPO phase-out timeline, CY2026 through January 2029.

• Bundling matrix: what is and is not separately reportable with 23472.

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Document History

Version	Date	Summary
1.0	July 2026	Initial publication under GoHealthcare Clinical Procedure Guide Standard v1.0. Two-pass code audit applied at authoring under the standing rule that official long descriptors and primary sources are verified rather than summaries. Arthroplasty descriptors verified against published CPT® code lists; Medicare Inpatient Only list phase-out and ASC Covered Procedures List status verified against the CY2026 OPPS/ASC Final Rule and CMS addenda; NCCI bundling of 23430 and 23615 with 23472 verified against AAOS coding guidance published November 2025 rather than older secondary sources; ICD-10-CM verified against FY2026 including confirmation that Z96.611/Z96.612 are not acceptable as principal diagnosis. Payer content reflects eviCore CMM-318, Carelon Joint Surgery, Evolent/NIA CG-317, TurningPoint 2026 updates, UnitedHealthcare shoulder policy, and HealthHelp PA listings.

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Educational Disclaimer

Educational Disclaimer

This document is part of the GoHealthcare Practice Solutions Knowledge Center and is intended for educational and operational reference purposes only. It is not a physician training or surgical technique manual and does not replace physician clinical judgment, payer policy review, legal advice, or official CMS guidance. It does not provide procedural technique, implant selection, medication dosing, or physician procedural training. Coverage policies, coding guidance, site-of-service rules, and reimbursement requirements change frequently and vary by payer and jurisdiction; always verify current CPT®, HCPCS, and ICD-10-CM codes, current CMS OPPS/ASC addenda, current NCCI edits, and the applicable payer's current medical policy at the time of service. The Medicare Inpatient Only list is actively phasing out through January 1, 2029, and site-of-service rules should be re-verified each cycle. Developed by Pinky Maniri, MSc, CRCR, CSAPM, CSPPM, CSBI, CSPR, CSAF, Certified in Healthcare A.I. Governance, Founder and Chief Executive Officer of GoHealthcare Practice Solutions.

Developed by Pinky Maniri

Developed by Pinky Maniri, MSc
CRCR · CSAPM · CSPPM · CSBI · CSPR · CSAF
Certified in Healthcare A.I. Governance
Founder & Chief Executive Officer, GoHealthcare Practice Solutions
A Musculoskeletal Specialty Management Services Organization (MSO)
Prior Authorization · Medical Necessity · Payer Intelligence · Revenue Cycle · Operations