Nerve Blocks — CPB 0863 | AETNA Coverage Update

Aetna modified CPB 0863 covering nerve blocks, effective February 27, 2026. Here's what billing teams need to know.

Aetna, a CVS Health company, updated Clinical Policy Bulletin CPB 0863 governing nerve block coverage across dozens of surgical and pain management indications. This policy covers a wide range of CPT codes — including CPT 64400, 64405, 64415–64416, 64418, 64420–64421, 64445–64450, 64463, 64467, 64469, 64473–64474, 64486–64489, 64510, 64520, and 64680 — and the selection criteria determine whether your claim pays or denies. If your practice bills nerve blocks for orthopedic, thoracic, breast, or chronic pain cases, this Aetna nerve block coverage policy change deserves your attention before claims hit the system.

Quick-Reference Table

Aetna Nerve Block Coverage Criteria and Medical Necessity Requirements 2026

The real issue with CPB 0863 is that medical necessity is highly indication-specific. Aetna doesn't simply cover "nerve blocks." It covers specific nerve block types for specific procedures or conditions. Bill outside those combinations and you're looking at a claim denial.

Aetna nerve block coverage policy organizes medical necessity around the block type and the clinical scenario. Some blocks are covered for post-operative pain only. Others require documented failure of conservative management first. A few are covered for chronic pain — but only as part of a comprehensive pain management program, not as standalone interventions.

The distinction matters for reimbursement. A femoral nerve block (CPT 64447 or 64448) is covered after knee replacement surgery. That same block billed for a different indication may not meet medical necessity under this policy. Your coders need to match the block type, the surgical procedure or diagnosis, and the CPT code together — not treat all nerve blocks as interchangeable.

Prior authorization requirements are not explicitly detailed in the summary for every code, but given Aetna's pattern on procedure-heavy policies, confirm prior auth status for your specific plan population before scheduling. This is especially true for chronic pain indications, where documentation of failed conservative management is a hard prerequisite for several block types.

For chronic pain billing, Aetna's coverage policy requires that peripheral nerve blocks — whether continuous or single-injection under CPT 64450 and related codes — serve as an active component of a comprehensive pain management program. Billing these as isolated interventions for chronic pain won't meet medical necessity under CPB 0863.

Aetna Nerve Block Exclusions and Non-Covered Indications

Several CPT codes are explicitly not covered for the indications listed in CPB 0863. These aren't gray areas — Aetna has categorized them as non-covered, and billing them will generate a denial.

CPT 64417 (axillary nerve injection) is not covered for indications in this policy. CPT 64451 (nerves innervating the sacroiliac joint) is not covered. CPT 64454 (genicular nerve branches) is not covered — and neither is CPT 64624, the destruction of genicular nerve branches. If your orthopedic practice has been billing genicular nerve blocks for knee pain, that's a denial waiting to happen under CPB 0863.

CPT 64461 and 64462 (thoracic paravertebral blocks, PVB) are also not covered under the indications listed in this policy — even though CPT 64463 (PVB continuous infusion by catheter) is covered when criteria are met. That's a subtle but important distinction for thoracic anesthesiology teams.

CPT 64505 (sphenopalatine ganglion block) and CPT 64517 (superior hypogastric plexus block) are not covered for listed indications. CPT 76942 (ultrasonic guidance for needle placement) is also listed as not covered for these indications — separate from the underlying block codes.

The phrenic block for refractory hiccups and the ganglion impar block for chronic anorectal pain associated with radiation proctitis are covered — but only after documented failure of multiple conservative approaches. Document that failure chain in the medical record before you bill. Without it, prior authorization or post-payment audit will expose the gap.

Coverage Indications at a Glance

Aetna Nerve Block Billing Guidelines and Action Items 2026

1. Audit your charge capture by block type and surgical indication — do this before billing any claims with dates of service after February 27, 2026.

The most common nerve block billing error under policies like CPB 0863 is treating nerve block CPT codes as general pain codes. They're not. Each code maps to a specific anatomical approach, and Aetna maps coverage to specific surgical or clinical indications. A mismatch generates a denial.

2. Pull your denial data for CPT 64454 and 64624 now.

If your orthopedic or pain management practice has been billing genicular nerve blocks or genicular nerve destruction under Aetna plans, run a claim history report. CPT 64454 and 64624 are explicitly not covered under CPB 0863. Any paid claims may be subject to recoupment in a future audit.

3. Separate your chronic pain nerve block documentation from acute post-op nerve block documentation.

Aetna applies different standards to each. For chronic pain, CPT 64450 and related peripheral nerve block codes require evidence that the block is part of a comprehensive pain management program. Your clinical documentation needs to reflect that explicitly — not just say "chronic pain."

4. Check your PVB billing against the covered vs. non-covered code split.

CPT 64461 and 64462 (thoracic paravertebral block, single injection) are not covered under this policy. CPT 64463 (continuous infusion by catheter) is covered when selection criteria are met. If your anesthesiology team defaults to the single-injection codes, update your charge capture templates now. This is the kind of distinction that generates repeated denials if your charge master isn't aligned.

5. Document failed conservative treatment for indication-specific requirements before billing.

Several indications under CPB 0863 require documented failure of conservative management. These include: ganglion impar block for radiation proctitis, lateral femoral cutaneous nerve block for meralgia paresthetica, inferior alveolar nerve block for facial/jaw pain, and phrenic block for hiccups. The documentation needs to be in the record before the claim, not added during an appeal. Make this part of your pre-procedure workflow.

6. Confirm prior authorization requirements with your Aetna provider relations contact for chronic pain and less common indications.

The coverage policy lists criteria, but prior auth requirements vary by plan product. Don't assume the medical necessity criteria are the only gate. If you're billing nerve blocks for chronic pelvic pain (genitofemoral block), refractory hiccups (phrenic block), or anorectal pain (ganglion impar block), verify prior auth status before you schedule. A single prior auth gap can flip a covered claim to a denial.

If your practice has a high volume of Aetna patients across multiple nerve block types, loop in your compliance officer to review documentation templates against the updated CPB 0863 criteria. The number of indication-specific requirements makes this a documentation-risk policy, not just a billing-risk one.

CPT, HCPCS, and ICD-10 Codes for Nerve Blocks Under CPB 0863

Covered CPT Codes (When Selection Criteria Are Met)

Not Covered CPT Codes