Core Decompression for Avascular Necrosis — CPB 0753 | AETNA Coverage Update

Aetna modified CPB 0753 covering core decompression for avascular necrosis, effective November 1, 2025. Here's what billing teams need to know.

Aetna, a CVS Health company, updated its core decompression coverage policy under CPB 0753 in the Aetna system. The policy governs reimbursement for HCPCS S2325 (hip core decompression) and a range of adjunctive procedures billed under CPT codes including 0101T, 0232T, 0481T, and 38232. The update sharpens the line between covered and experimental indications — and that line has real claim denial exposure for orthopedic and surgical billing teams.

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Quick-Reference: Aetna CPB 0753 Core Decompression Policy (2025)

Field	Detail
Payer	Aetna, a CVS Health company
Policy	Core Decompression for Avascular Necrosis
Policy Code	CPB 0753
Change Type	Modified
Effective Date	November 1, 2025
Impact Level	High
Specialties Affected	Orthopedic surgery, sports medicine, interventional radiology, hematology/oncology
Key Action	Audit all core decompression claims for stage documentation — only Ficat Stage I or II femoral head AVN qualifies for coverage under S2325

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Aetna Core Decompression Coverage Criteria and Medical Necessity Requirements 2025

The Aetna core decompression coverage policy is narrow. Medical necessity applies to exactly one scenario: early-stage avascular necrosis (AVN) of the hip — specifically the femoral head and/or neck — at Ficat Stage I or II, before X-ray changes are evident.

That's it. One joint. Two stages. Everything else is experimental.

Your documentation has to establish pre-collapse status at the time of service. Aetna uses the Ficat Classification to define staging. Under that system, cysts on imaging push a patient into Stage II — still covered. Stage III or higher means post-collapse, and that's where medical necessity ends under this policy.

The practical takeaway: if the operative or diagnostic record doesn't clearly state Ficat staging, your claim for S2325 is exposed. Don't let your billing team submit without that staging language in the supporting documentation. If your practice doesn't routinely document Ficat stage in the surgical note, fix that workflow before November 1, 2025.

Aetna's core decompression billing guidelines don't explicitly call out prior authorization requirements within CPB 0753 itself, but prior auth requirements can vary by plan. Check the member's specific plan documents before scheduling. Assuming no prior auth is required for a surgical procedure is a fast path to a claim denial.

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Aetna Core Decompression Exclusions and Non-Covered Indications

This is where CPB 0753 gets long — and where most denials will come from.

Aetna classifies core decompression as experimental, investigational, or unproven for AVN in any joint other than the hip. That means ankle, elbow, knee, mandibular condyle, and shoulder are all excluded. If your orthopedic team performs core decompression at the knee or shoulder and bills it under S2325, expect a denial.

Late-stage hip AVN (Stage III or higher, when X-ray changes have occurred) is also experimental. So is post-arthroscopic osteonecrosis.

The adjunctive treatment exclusion list is extensive. Aetna considers all of the following experimental when used to treat AVN in any joint:

Four additional procedure combinations are explicitly experimental:

The real issue here is the stem cell and PRP combinations. These are being used in practice and marketed aggressively. If your orthopedic or regenerative medicine group has been billing any of these alongside S2325 for Aetna patients, audit those claims now. The bisphosphonate injections — J1436 (etidronate disodium), J1740 (ibandronate sodium), J2430 (pamidronate disodium), J3489 (zoledronic acid) — are also non-covered under this policy.

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Coverage Indications at a Glance

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Aetna Core Decompression Billing Guidelines and Action Items 2025

Copy Action Items

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CPT, HCPCS, and ICD-10 Codes for Core Decompression Under CPB 0753

Covered HCPCS Codes (When Selection Criteria Are Met)

Code	Type	Description Copy
S2325	HCPCS	Hip core decompression

Experimental / Not Covered CPT Codes

Not Covered HCPCS Codes

Key ICD-10-CM Diagnosis Codes

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