Bunionectomy — CPB 0629 | AETNA Coverage Update

Aetna modified CPB 0629 for bunionectomy, effective December 12, 2025. Here's what billing teams need to act on before claims start hitting your denial queue.

Aetna, a CVS Health company, updated its bunionectomy coverage policy under CPB 0629 Aetna system. The update tightens the medical necessity criteria for both simple and bony correction bunionectomy procedures. The primary CPT codes affected are 28292, 28295, 28296, 28297, 28298, 28299, 28750, 28289, and 28110. If your practice bills these codes for Aetna members, this change affects your documentation requirements and claim denial risk starting December 12, 2025.

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Quick-Reference Table

Field	Detail Copy
Payer	Aetna, a CVS Health company
Policy	Bunionectomy — CPB 0629
Policy Code	CPB 0629
Change Type	Modified
Effective Date	December 12, 2025
Impact Level	High
Specialties Affected	Podiatry, Orthopedic Surgery, Foot & Ankle Surgery
Key Action	Audit documentation for HVA and IMA angle thresholds on all pending Aetna bunionectomy cases before December 12, 2025

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Aetna Bunionectomy Coverage Criteria and Medical Necessity Requirements 2025

The real issue here is specificity. Aetna's updated coverage policy sets hard radiographic thresholds that determine whether a claim survives review. If your documentation doesn't hit those numbers, you're looking at a denial.

There are two procedure tracks under CPB 0629: simple bunionectomy and bony correction bunionectomy. Each has its own medical necessity criteria. They are not interchangeable.

Simple Bunionectomy

Simple bunionectomy — think modified McBride or Silver procedure, soft tissue removal without bony correction — covers members who meet one of two conditions.

The first path requires all three of the following. The member must have at least six months of documented conservative treatment directed by a healthcare professional. That treatment must include options such as alternative footwear, corticosteroid injections, debridement of hyperkeratotic lesions, foot orthotics, oral analgesics or NSAIDs, and protective cushions or pads. Then the member needs radiographic confirmation — weight-bearing X-ray — showing a hallux valgus angle (HVA) of 15 degrees or more with no degenerative changes at the metatarsophalangeal (MTP) joint. Skeletal maturity must also be documented.

The second path is narrower. Members with diabetes who have an ulcer or infection stemming solely from the bunion qualify without meeting the conservative care or radiographic thresholds above.

Note that foot orthotics — billed under HCPCS L3000–L3047 — are generally contractually excluded under most Aetna plans. Document them in the conservative treatment record, but don't expect reimbursement on those codes.

Bony Correction Bunionectomy

Bony correction procedures — Akin, Chevron, Keller, Lapidus, Mitchell, proximal metatarsal osteotomy, billed as CPT 28295, 28296, 28297, 28298, 28299 — carry a higher bar. Every criterion below must be met. All of them.

First, the member must have failed at least six months of conservative treatment. Aetna is specific about footwear here: the member must have worn well-fitting, low-heeled shoes made of soft materials with a wide toe box, or lace-ups or combination-last shoes that conform to the bunion. Generic documentation saying "patient tried different shoes" won't hold up.

Second, the most recent weight-bearing X-ray must show both of the following: an HVA of 30 degrees or greater, and an inter-metatarsal angle (IMA) of 12 degrees or greater. Both thresholds. One is not enough.

Third, skeletal maturity must be documented. For younger patients, this means epiphyseal closure. Aetna also accepts age 18 or older as a proxy for skeletal maturity.

Fourth, the member must have at least one of these complicating conditions: a neuroma secondary to the bunion; cross-over toe deformity; limited or painful range of motion at the first toe MTP joint; painful prominence of the dorsiflexed second toe from first toe pressure; ulceration caused by the bunion; or recurrent bursitis.

That fourth criterion is often the one billing teams overlook. The complicating condition must be documented in the clinical note — not assumed from the imaging.

Bunionectomy billing under CPB 0629 requires that all four criteria above be in the chart before you submit. Missing any one triggers denial. Prior authorization requirements for bony correction procedures should be confirmed per individual Aetna plan, as PA requirements vary by plan type and state.

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Aetna Bunionectomy Exclusions and Non-Covered Indications

Aetna labels simple bunionectomy as experimental, investigational, or unproven for all indications outside the two covered pathways above. That's the policy's exact language — EI&U.

That designation matters. EI&U denials are harder to appeal than standard medical necessity denials. If you're billing CPT 28292 (Keller, McBride, or Mayo type) for a patient who doesn't meet the HVA threshold or hasn't completed six months of conservative care, you're not just facing a denial. You're facing a denial category with a steeper climb on appeal.

The same logic applies if you attempt to bill a simple bunionectomy for cosmetic improvement or patient preference. No clinical criteria, no coverage.

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Coverage Indications at a Glance

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Aetna Bunionectomy Billing Guidelines and Action Items 2025

The effective date is December 12, 2025. That gives your team a fixed deadline to work backward from. Here's what to do before that date.

Copy Action Items

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CPT, HCPCS, and ICD-10 Codes for Bunionectomy Under CPB 0629

Covered CPT Codes (When Selection Criteria Are Met)

Foot Orthotic HCPCS Codes (Generally Contractually Excluded Under Aetna)

Code	Type	Description Copy
L3000–L3047	HCPCS	Foot inserts and arch supports (multiple codes) — document for conservative care record; generally not reimbursable under Aetna plan contracts

Note: The full HCPCS orthotics code range in CPB 0629 spans 184 codes. Confirm individual plan contract language before billing any L-code for Aetna members.

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