ModifiedUnitedHealthcarePolicy 2025T0622L

Surgery of the ankle (including arthroplasty, arthroscopy, arthrodesis, osteochondral transplant) — Coverage Criteria

This policy governs medical necessity and coverage considerations for surgical procedures of the ankle (arthrodesis, arthroscopy, arthrotomy, total joint replacement, and osteochondral allograft/autograft transplantation) for UnitedHealthcare Commercial and Individual Exchange members.

Policy Summary

PayerUnitedHealthcare

PolicySurgery of the ankle (including arthroplasty, arthroscopy, arthrodesis, osteochondral transplant) — Coverage Criteria

Policy CodePolicy 2025T0622L

Change TypeUpdated clinical evidence and references

Effective DateJul 1, 2025

Next Review DateN/A

Key ActionObtain prior authorization per plan requirements and supply clinical documentation demonstrating prior nonoperative management failure and lesion characteristics when requesting coverage.

SourceLink

POLICY UPDATE CHANGES

Updated Clinical Evidence and References sections to reflect the most current information and archived the previous policy version.

InterQualInterQual referenced

Not medically necessaryOAT stance

≈20Representative codes listed

52%-89%Reported improvement rates

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Coverage Criteria

Procedures covered per InterQual criteria

Covered when clinical criteria are met per InterQual for the specified procedures

InterQual-based coverage: Surgery of the ankle (arthrodesis, arthroscopy, arthrotomy, total joint replacement) is medically necessary in certain circumstances when clinical criteria from InterQual CP are met

Refer to InterQual CP modules: Arthrodesis, Ankle (Talotibial Joint); Arthroscopy, Surgical, Ankle; Arthrotomy, Ankle; Total Joint Replacement (TJR), Ankle; and InterQual Client Defined arthroplasty/removal or revision (custom UHG).

Osteochondral allograft/autograft transplant (OAT)

Not covered / not medically necessary

Osteochondral transplant stance: Osteochondral allograft or autograft transplantation (OAT) for treating cartilage defects of the ankle is considered unproven and not medically necessary due to insufficient evidence of efficacy.

Future randomized controlled trials with long-term follow-up are needed to establish safety and efficacy.

Evidence limitations and comparative effectiveness

Evidence summary and efficacy observations from systematic reviews and HTAs:

Evidence summary: Multiple systematic reviews and health technology assessments report variable success rates for osteochondral procedures with generally low-quality evidence, heterogeneous study designs, and inconsistent outcomes. Reported pooled success rates include approximately 90% for osteochondral autograft transfer, 65% for mosaicplasty, and 55% for osteochondral allograft transfer in one systematic review; Hayes HTAs found overall improvement rates of 52%–89% but also high graft failure rates (11%–48%). Lack of randomized comparative trials, small sample sizes, inconsistent outcome measures, and variable surgical protocols limit definitive conclusions.

Supported by Lambers et al. 2017 (systematic review), Migliorini et al. 2022 summaries, and Hayes HTA reports indicating low-quality and heterogeneous evidence.

Listing of a procedure or diagnosis code in this policy is provided for reference only and does not imply that the service described by the code is covered or non-covered. Benefit coverage and claim payment are determined by the member-specific benefit plan document and applicable laws; inclusion of a code in this policy does not guarantee reimbursement or payment.

Systematic reviews and health technology assessments report insufficient and low-quality evidence to establish the effectiveness of osteochondral allograft transplantation and of osteochondral autograft transfer (OAT/mosaicplasty) for talar lesions. The available studies are heterogeneous in design, include small sample sizes, and have variable outcome measures and follow-up, so definitive conclusions about comparative benefit cannot be drawn.

Osteochondral allograft or autograft transplantation (OAT) for treatment of cartilage defects of the ankle is considered unproven and not medically necessary due to insufficient evidence of safety, efficacy, and durability. Future randomized controlled trials with long-term outcomes are needed to establish its clinical benefit.

Because the evidence base is generally low quality, inconsistent, and at high risk of bias, certain osteochondral procedures or indications may be determined not medically necessary in the absence of documented rationale such as prior failed conservative therapy, specific lesion characteristics, or comparative data showing benefit over established alternatives.

Coding

Applicable CPT Procedure Codes (representative)CPT

27685	Lengthening or shortening of tendon, leg or ankle; single tendon (separate procedure)
28446	Open osteochondral autograft, talus (includes obtaining graft[s])
28899	Unlisted procedure, foot or toes
27700	Total Joint Replacement (TJR), Ankle
27702	Arthroplasty, ankle
27703	Arthroplasty, ankle; with implant (total ankle)
27704	Arthroplasty, ankle; revision, total ankle / Removal of ankle implant
29891	Arthroscopy, ankle, surgical, excision of osteochondral defect of talus and/or tibia, including drilling of the defect
29892	Arthroscopically aided repair of large osteochondritis dissecans lesion, talar dome fracture, or tibial plafond fracture, with or without internal fixation (includes arthroscopy)
29894	Arthroscopy, ankle (tibiotalar and fibulotalar joints), surgical; with removal of loose body or foreign body

1–10 of 14

1/2

Device/Regulatory notemixed

No codes listed

Provider Actions and Requirements

Prior Authorization

Prior Authorization Recommended

Prior authorization is recommended and may be required by the member’s benefit plan. Providers should obtain prior authorization per plan requirements and confirm plan-specific rules before scheduling procedures.

Obtain prior authorization when required by the member’s plan.
InterQual criteria may be used to determine medical necessity for listed ankle procedures.

Documentation Required

Medical Records May Be Required

Coverage decisions depend on documentation showing the member meets the clinical criteria. Medical records documentation may be requested to assess whether the clinical criteria are met; submission of records does not guarantee coverage.

Provide complete medical records including history, exam findings, prior conservative therapy, imaging, and operative reports when applicable.
Failure to provide adequate documentation may result in denial or delay of authorization.

Background

Osteoarthritis and posttraumatic ankle arthritis result from cartilage degeneration or prior joint injury (for example fractures or dislocations) and can cause pain, loss of joint space, and osteophyte formation. Clinical management depends on disease severity and patient factors; surgical options include arthrodesis, arthroplasty, arthroscopy, and joint-preserving procedures, but osteochondral transplantation for ankle cartilage defects currently lacks high-quality evidence to support routine use.

Definitions

Osteoarthritis — definition

DefinitionOsteoarthritis — degenerative arthritis in which joint cartilage gradually wears away, becoming frayed and rough; loss of protective joint space can lead to bone-on-bone contact and painful osteophytes (bone spurs).

Posttraumatic arthritis — definition

DefinitionPosttraumatic arthritis — arthritis that develops after an injury to the foot or ankle; fractures and dislocations are the most common inciting injuries and cartilage wear may occur many years after the initial trauma.

OAT / osteochondral transplantation — definition

DefinitionOsteochondral transplantation (OAT) — transplantation of osteochondral tissue (autograft or allograft) to repair cartilage and subchondral bone defects of the talus or ankle joint; described in systematic reviews as including techniques such as autograft transfer, allograft transfer, and mosaicplasty with variable reported success rates.

Revision History

07/01/2025revisionLatest

Updated Clinical Evidence and References sections to reflect the most current information and archived the previous policy version (2025T0622K).