Currentsierra health and lifePolicy 2026T0622N

Osteochondral allograft/autograft transplantation for ankle (OAT) — Coverage Criteria

Governs coverage and medical necessity of osteochondral allograft or autograft transplantation for ankle cartilage defects (talus) for UnitedHealthcare Commercial and Individual Exchange plans; describes evidence, coding references, and relates to InterQual criteria for ankle surgeries.

Policy Summary

Payersierra health and life

PolicyOsteochondral allograft/autograft transplantation for ankle (OAT) — Coverage Criteria

Policy CodePolicy 2026T0622N

Change TypeNo material clinical or coverage changes

Effective DateJan 1, 2026

Next Review DateN/A

Key ActionCheck member specific benefit plans and prior authorization requirements before submitting requests; provide medical records to demonstrate clinical criteria.

SourceLink

POLICY UPDATE CHANGES

No material clinical or coverage changes in this revision.

insufficientpolicy conclusion on OAT efficacy

50 studiessystematic review size

14%comparative studies

AOFAS 2022professional society

7references

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Coverage Determination

Not medically necessary for OAT

Covered when ALL of the following are met:

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

See evidence summary for details.

This policy addresses coverage of osteochondral allograft and autograft transplantation (OCA/OAT) for cartilage defects of the ankle (talus). Based on the available evidence, OAT/OCA for ankle osteochondral lesions is designated unproven and not medically necessary because there is insufficient quality evidence demonstrating long‑term safety and efficacy to support routine coverage.

Available systematic reviews and technology assessments report predominantly small, retrospective, and heterogeneous studies with a high risk of bias and limited comparative data. For example, a recent systematic review summarized 50 studies (806 ankles) in which most studies were retrospective and only 14% included a comparison group; 86% were classified as level 4 evidence and many showed high risk of bias across multiple domains. Older Hayes assessments similarly found mostly small uncontrolled studies, inconsistent outcome reporting, and no sufficient randomized controlled trial evidence to establish effectiveness.

Because the evidence base is limited by study design, sample size, inconsistent surgical techniques and outcome measures, and variable follow‑up — and because multiple reports noted graft failures that required further surgery — this policy concludes that OAT/OCA for osteochondral lesions of the talus remains not medically necessary/unproven. Future well‑designed comparative trials with long‑term outcomes are needed to change this determination.

This Medical Policy is interpretive and intended to assist in applying standard UnitedHealthcare benefit plans. Coverage determinations must be made in reference to the member specific benefit plan document, and that document governs in the event of any conflict. Before relying on this policy, providers should check the member’s plan terms and any applicable federal or state mandates, as plan coverage and prior authorization requirements may differ.

Provider Responsibilities and Documentation

Note

Applicable Procedure Codes (reference)

The following procedure and diagnosis codes are provided for reference only. Listing of a code in this policy does not imply that the service described by the code is a covered or non-covered health service. Verify member benefits and coverage criteria before billing.

CPT: 27685 – Lengthening or shortening of tendon, leg or ankle; single tendon (separate procedure)
CPT: 27702 – Arthroplasty, ankle; with implant (total ankle)
CPT: 28446 – Open osteochondral autograft, talus (includes obtaining graft[s])
CPT: 29891 – Arthroscopy, ankle, surgical, excision of osteochondral defect of talus and/or tibia, including drilling of the defect
CPT: 29892 – Arthroscopically aided repair of large osteochondritis dissecans lesion, talar dome fracture, or tibial plafond fracture, with or without internal fixation (includes arthroscopy)
CPT: 29894 – Arthroscopy, ankle; removal of loose body or foreign body
CPT: 29895 – Arthroscopy, ankle; synovectomy, partial
CPT: 29897 – Arthroscopy, ankle; debridement, limited
CPT: 29898 – Arthroscopy, ankle; debridement, extensive
CPT: 29899 – Arthroscopy, ankle; with ankle arthrodesis (also listed for arthrodesis procedures)

Procedure and Billing Codes

Applicable procedure codes (reference)CPT

27685	Lengthening or shortening of tendon, leg or ankle; single tendon (separate procedure).
28446	Open osteochondral autograft, talus (includes obtaining graft[s]).
27702	Arthroplasty, ankle; with implant (total ankle).
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.
29895	Arthroscopy, ankle (tibiotalar and fibulotalar joints), surgical; synovectomy, partial.
29897	Arthroscopy, ankle (tibiotalar and fibulotalar joints), surgical; debridement, limited.
29898	Arthroscopy, ankle (tibiotalar and fibulotalar joints), surgical; debridement, extensive.
29899	Arthroscopy, ankle (tibiotalar and fibulotalar joints), surgical; with ankle arthrodesis.

Clinical Background

Ankle osteoarthritis and posttraumatic arthritis arise from progressive cartilage degeneration of the tibiotalar joint and from prior injuries (fractures or dislocations) that alter joint mechanics and lead to delayed cartilage breakdown. Osteochondral lesions of the talus (OLT) are a common clinical presentation that can cause persistent pain and dysfunction, particularly in younger active patients.

Surgical management options for talar cartilage defects include arthroscopic debridement, microfracture, osteochondral autograft transfer (OAT or mosaicplasty), osteochondral allograft transplantation (OCA), arthrodesis, and total ankle replacement. The literature evaluating OAT/OCA consists largely of small case series and uncontrolled studies with variable follow‑up; some studies report improvements in pain and function but also document substantial rates of graft failure requiring revision procedures (including repeat grafting, arthrodesis, or arthroplasty).

Because existing studies are heterogeneous in patient selection, graft preparation, surgical technique, and outcome measurement, there is uncertainty about the long‑term durability and comparative effectiveness of osteochondral transplantation for talar lesions.

Definitions

Osteoarthritis definition

DefinitionOsteoarthritis: degenerative arthritis in which joint cartilage gradually wears away, leading to frayed rough cartilage, decreased joint space, bone-on-bone contact, and osteophyte (bone spur) formation.

Typical onsetMost common after middle age but can occur in younger people.

PathophysiologyProgressive loss of articular cartilage resulting in joint space narrowing and bony changes causing pain and dysfunction.

Posttraumatic arthritis definition

DefinitionPosttraumatic arthritis: arthritis that develops after injury to the foot or ankle; dislocations and fractures are the most common precipitating injuries.

TimingCan develop many years after the initial injury.

Policy Summary

Payersierra health and life

PolicyOsteochondral allograft/autograft transplantation for ankle (OAT) — Coverage Criteria

Policy CodePolicy 2026T0622N

Change TypeNo material clinical or coverage changes

Effective DateJan 1, 2026

Next Review DateN/A

Key ActionCheck member specific benefit plans and prior authorization requirements before submitting requests; provide medical records to demonstrate clinical criteria.

SourceLink

On This Page

Prior Authorization

Check Prior Authorization and Member Plan

Prior authorization and member-specific rules may apply. Verify the member's benefit plan and any prior authorization requirements before scheduling or performing the service.

Check prior authorization requirements with the member's plan
Confirm any plan-specific criteria, limits, or exclusions

Documentation Required

Documentation & Member Benefits

Medical records and documentation may be required to determine whether clinical criteria for coverage are met. Submission of records does not guarantee coverage; benefits are determined by the member's specific plan document and applicable laws.

Provide complete medical records to support medical necessity (operative reports, imaging, history/exam, conservative therapy documentation)
Documentation may be requested during claim review or prior authorization review

Note

Member Benefit Plan Governs

When there is a conflict between this policy and the member's benefit plan document, the member specific benefit plan governs. Always reference the member specific plan and applicable federal or state mandates when making coverage decisions.

Reference the member specific benefit plan document for coverage determinations
Apply applicable federal or state mandates as required

Note

Reference Member Specific Plan

Reference the member specific benefit plan and any applicable guidelines (e.g., InterQual) when determining coverage and medical necessity.

Use InterQual or other referenced clinical criteria when indicated
Confirm applicability of criteria to the member's plan

PathophysiologyLike osteoarthritis, it causes progressive wear of the cartilage between joint surfaces leading to pain and dysfunction.

Osteochondral transplantation definition (autograft/allograft)

DefinitionOsteochondral transplantation (autograft or allograft): surgical procedures that treat osteochondral lesions of the talus by transplanting cartilage and underlying subchondral bone using the patient’s own tissue (autograft) or donor tissue (allograft).

Indications referencedUsed to treat focal osteochondral lesions of the talus as an operative option among ankle cartilage procedures.

Guidance sourcesPosition statement and systematic reviews (e.g., AOFAS 2022; multiple systematic reviews summarized in references).