Aetna modified CPB 0863 governing nerve block coverage, effective February 27, 2026. Here's what billing teams need to do.
Aetna, a CVS Health company, updated Clinical Policy Bulletin CPB 0863 to clarify medical necessity criteria across dozens of nerve block procedures and their associated CPT codes. The change draws sharp lines between covered indications and non-covered ones — lines that will drive claim denial if your documentation doesn't match exactly. If your team bills nerve block procedures across orthopedic, oncology, cardiothoracic, or pain management services, this Aetna nerve block coverage policy update deserves your immediate attention.
Quick-Reference Table
| Field | Detail |
|---|---|
| Payer | Aetna, a CVS Health company |
| Policy | Nerve Blocks — CPB 0863 |
| Policy Code | CPB 0863 |
| Change Type | Modified |
| Effective Date | February 27, 2026 |
| Impact Level | High |
| Specialties Affected | Orthopedic surgery, pain management, anesthesiology, breast surgery, cardiothoracic surgery, oncology, neurology, urology |
| Key Action | Audit charge capture and documentation templates for all nerve block CPT codes against the updated indication-specific medical necessity criteria before billing post-February 27, 2026 claims |
Aetna Nerve Block Coverage Criteria and Medical Necessity Requirements 2026
The core of this policy is indication-specific medical necessity. Aetna does not treat nerve blocks as a blanket category. Each block type has its own covered indications — and billing one block code for the wrong clinical scenario is a straight path to denial.
Aetna considers nerve blocks medically necessary only when they match the specific indications listed in CPB 0863 in the CPB 0863 Aetna system. That's not unusual for a major commercial payer, but the granularity here is notable. The policy covers more than 30 distinct block types, each tied to specific procedures, diagnoses, or documented treatment failure requirements.
Several blocks require documented failure of conservative management before Aetna approves reimbursement. The ganglion impar block (for chronic anorectal pain from radiation proctitis) requires failure of pain medication and topical antispasmodics. The lateral femoral cutaneous nerve block (for meralgia paresthetica) requires failure of non-opioid analgesics or anticonvulsants such as carbamazepine, gabapentin, or phenytoin. The phrenic nerve block (for refractory hiccups) requires failure of both conservative methods and pharmacotherapies including benzodiazepines, chlorpromazine, gabapentin, olanzapine, or muscle relaxants.
Document that treatment failure explicitly in the chart before the procedure. Aetna will look for it.
Prior authorization requirements are not universally specified within the CPB itself, but Aetna's plan-level prior auth requirements apply on top of this coverage policy. Check your specific plan contracts. For high-dollar procedures like continuous catheter-based nerve blocks (CPT 64416, 64446, 64448, 64449), assume prior auth is likely required and verify before the procedure date.
The peripheral nerve block category (CPT 64450 and related codes) has an important restriction. Aetna covers peripheral nerve blocks for acute pain broadly — but for chronic pain, the block must be an active component of a comprehensive pain management program. A standalone chronic pain injection without a documented, active multimodal program supporting it will not meet medical necessity under this coverage policy.
Aetna Nerve Block Exclusions and Non-Covered Indications
Several nerve block codes and indications are explicitly not covered under CPB 0863. These are high-risk codes for denials if your team isn't tracking them.
CPT 64417 (axillary nerve injection) is listed as not covered for indications in the CPB. Note the distinction: CPT 64415 and 64416 cover brachial plexus blocks and are covered when criteria are met. CPT 64417 specifically is not covered.
CPT 64451 (sacroiliac joint nerve injection with imaging) and CPT 64454 (genicular nerve branch injection with imaging) are both not covered. The genicular nerve block has generated significant billing activity in the orthopedic and pain management space over the last two years. Aetna draws a hard line here — don't bill 64454 expecting coverage.
CPT 64461 and 64462 (thoracic paravertebral blocks) are not covered. This is notable because the erector spinae plane block and pecto-intercostal fascial block for similar thoracic indications are covered. If your team is billing PVB codes for thoracic cases, verify the specific block performed and document accordingly.
CPT 64505 (sphenopalatine ganglion injection) is not covered. Neither is CPT 64517 (superior hypogastric plexus injection).
CPT 64624 (genicular nerve destruction with imaging guidance) is not covered. This aligns with the non-coverage of diagnostic genicular nerve blocks above — Aetna is not covering the genicular nerve pathway at all under this policy.
CPT 76942 (ultrasonic guidance for needle placement) is explicitly listed as not covered for indications in this CPB. This is a significant reimbursement risk. If your team routinely adds 76942 to nerve block claims as a guidance add-on, remove it from Aetna claims. The imaging guidance for covered nerve blocks is either bundled into the primary codes or not separately reimbursable under this policy.
Coverage Indications at a Glance
| Indication | Block Type | Status | Relevant Codes | Notes |
|---|---|---|---|---|
| Knee replacement surgery | Adductor canal block | Covered | 64450 | Also covers manipulation under anesthesia, ACL reconstruction, ankle arthroplasty |
| Forearm, hand, wrist surgery | Axillary brachial plexus block | Covered | 64415, 64416 | Post-operative pain control |
| Carpal tunnel surgery | Bier block | Covered | 64450 | |
| Cancer/malignancy pain | Celiac nerve block | Covered | 64680 | Neurolytic celiac plexus also covered |
| Carotid endarterectomy, thyroid/neck surgery, anterior cervical discectomy fusion | Cervical plexus block | Covered | 64450 | Superficial and deep |
| Breast reconstruction, lumpectomy, mastectomy, thoracic/lumbar fusion, lung resection, mediastinal lymph node dissection | Erector spinae plane (ESP) block | Covered | 64467, 64469 | Thoracic fascial plane block codes |
| Hip fracture; hip and knee surgery | Fascia iliaca block | Covered | 64473, 64474 | Lower extremity fascial plane block |
| Knee replacement | Femoral nerve block | Covered | 64447, 64448 | |
| Lower limb surgeries | Femoral-sciatic nerve block | Covered | 64447, 64448, 64445, 64446 | |
| Chronic anorectal pain from radiation proctitis | Ganglion impar block | Covered | 64450 | Requires failure of pain meds and topical antispasmodics |
| Chronic pelvic/suprapubic pain | Genitofemoral nerve block | Covered | 64450 | |
| Refractory facial/jaw pain | Inferior alveolar nerve block | Covered | 64450 | Requires failure of conventional pain meds including NSAIDs |
| Upper extremity surgery | Infraclavicular nerve block | Covered | 64415, 64416 | |
| Acute intercostal pain; chronic intercostal neuritis | Intercostal nerve block | Covered | 64420, 64421 | Chronic: must be part of comprehensive pain management program |
| Tourniquet pain during surgery | Intercostobrachial nerve block | Covered | 64450 | |
| Shoulder surgery | Interscalene/suprascapular nerve block | Covered | 64418, 64415 | |
| Ankle arthroplasty, ACL repair, knee arthroscopy, meniscectomy, TKA | IPACK block | Covered | 64450 | |
| Meralgia paresthetica; total hip arthroplasty | Lateral femoral cutaneous nerve block | Covered | 64450 | Requires failure of non-opioid analgesics or anticonvulsants |
| Total hip arthroplasty | Lumbar plexus block | Covered | 64449 | |
| Infants and children post-operative pain | Neuraxial/caudal block | Covered | 64450 | |
| Cardiothoracic surgery | Pecto-intercostal fascial block | Covered | 64467, 64469 | |
| Breast cancer surgery/mastectomy | Pectoral plane nerve block | Covered | 64467, 64469 | |
| Acute pain; chronic pain (program-based) | Peripheral nerve block (single or continuous) | Covered | 64450, 64415–64449 | Chronic pain requires active comprehensive program |
| Refractory hiccups | Phrenic nerve block | Covered | 64450 | Requires failure of conservative and pharmacologic methods |
| Foot and ankle surgery | Popliteal nerve block | Covered | 64445, 64446 | |
| Foot and ankle surgery | Posterior tibial nerve block | Covered | 64450 | |
| Cervical sympathetic (stellate ganglion) | Stellate ganglion block | Covered | 64510 | Covered for indications in CPB |
| Trigeminal nerve | Trigeminal nerve block | Covered (criteria) | 64400 | Each branch separately |
| Lumbar/thoracic paravertebral sympathetic | Sympathetic block | Covered (criteria) | 64520 | |
| TAP block — unilateral/bilateral | Transversus abdominis plane (TAP) block | Covered (criteria) | 64486, 64487, 64488, 64489 | |
| Genicular nerve block | Genicular nerve injection | Not Covered | 64454 | Not covered under any indication |
| Genicular nerve destruction | Genicular nerve ablation | Not Covered | 64624 | Not covered |
| Thoracic paravertebral block | PVB thoracic | Not Covered | 64461, 64462 | |
| Sacroiliac joint nerve injection | SI joint nerve block | Not Covered | 64451 | |
| Sphenopalatine ganglion | SPG block | Not Covered | 64505 | |
| Superior hypogastric plexus | Hypogastric plexus block | Not Covered | 64517 | |
| Ultrasound guidance for nerve blocks | Imaging guidance add-on | Not Covered | 76942 | Do not bill separately on Aetna claims |
| Axillary nerve (standalone) | Axillary nerve injection | Not Covered | 64417 | Distinct from axillary brachial plexus block |
Aetna Nerve Block Billing Guidelines and Action Items 2026
Here's what your billing team needs to do before submitting claims with dates of service on or after February 27, 2026.
| # | Action Item |
|---|---|
| 1 | Pull every nerve block CPT code from your charge master and map it against the updated CPB 0863 indications. Start with the not-covered codes — 64417, 64451, 64454, 64461, 64462, 64505, 64517, 64624, and 76942. Flag any claims already submitted or in queue that include these codes against Aetna members. |
| 2 | Remove CPT 76942 from Aetna nerve block claim templates immediately. This is the highest-volume denial risk in this update. Ultrasonic guidance billed separately on Aetna nerve block claims is not covered under this CPB. If you've been adding 76942 as a standard add-on, your Aetna claims are at risk right now. |
| 3 | Update your documentation templates for all step-therapy-required blocks. For ganglion impar, lateral femoral cutaneous, inferior alveolar, and phrenic nerve blocks, add explicit fields for documenting prior treatment failure. The note must name the conservative treatments tried and confirm they failed. Without that documentation, nerve block billing for these indications will not survive a claim review. |
| 4 | Separate your chronic pain peripheral nerve block workflow from your acute pain workflow. For chronic pain cases, the documentation must connect the nerve block to an active, ongoing comprehensive pain management program. A one-off injection billed as a chronic pain treatment — without documented program participation — will not meet medical necessity under this policy. |
| 5 | Verify prior authorization on continuous catheter-based nerve blocks before the procedure date. CPT codes 64416, 64446, 64448, and 64449 (continuous infusion blocks) carry higher reimbursement and higher scrutiny. Don't assume the single-injection approval covers the continuous version. They're separate codes with separate authorization requirements in most Aetna plans. |
| 6 | Audit recent claims for genicular nerve procedures. CPT 64454 and 64624 are not covered. If your pain management team has been performing genicular nerve blocks or ablations, those claims need a secondary review before submission. If they've already gone out and paid, flag them for monitoring — a retrospective audit from Aetna is possible. |
| 7 | Loop in your compliance officer if you have high volume in any of the not-covered categories. Genicular nerve procedures in particular have been a growth area in pain management billing. If those claims represent significant revenue under your Aetna contracts, your compliance officer and billing consultant should assess exposure before the effective date passes. |
| Previous Version | Current Version |
|---|---|
| Coverage is considered experimental and investigational for all indications | Coverage is considered medically necessary when specific criteria are met |
| Prior authorization is not required | Prior authorization is required for initial treatment |
| Documentation must include clinical history | Documentation must include clinical history |
| Re-review every 24 months | Re-review every 12 months with updated clinical documentation |
CPT, HCPCS, and ICD-10 Codes for Nerve Blocks Under CPB 0863
Covered CPT Codes (When Selection Criteria Are Met)
| Code | Description |
|---|---|
| 64400 | Injection(s), anesthetic agent(s) and/or steroid; trigeminal nerve, each branch |
| 64405 | Injection(s), anesthetic agent(s) and/or steroid; greater occipital nerve |
| 64415 | Injection(s), anesthetic agent(s) and/or steroid; brachial plexus |
| 64416 | Injection(s), anesthetic agent(s) and/or steroid; brachial plexus, continuous infusion by catheter |
| 64418 | Suprascapular nerve |
| 64420 | Intercostal nerve block, single level |
| 64421 | Intercostal nerve blocks, multiple levels |
| 64445 | Injection(s), anesthetic agent(s) and/or steroid; sciatic nerve, including imaging guidance, when performed |
| 64446 | Sciatic nerve, continuous infusion by catheter (including catheter placement), including imaging guidance |
| 64447 | Injection of anesthetic agent; femoral nerve, including imaging guidance, when performed |
| 64448 | Femoral nerve, continuous infusion by catheter (including catheter placement), including imaging guidance |
| 64449 | Injection(s), anesthetic agent(s) and/or steroid; lumbar plexus, posterior approach, continuous infusion |
| 64450 | Injection(s), anesthetic agent(s) and/or steroid; other peripheral nerve or branch |
| 64463 | Paravertebral block (PVB), thoracic; continuous infusion by catheter |
| 64467 | Thoracic fascial plane block, unilateral; by continuous infusion(s), including imaging guidance, when performed |
| 64469 | Thoracic fascial plane block, bilateral; by continuous infusion(s), including imaging guidance, when performed |
| 64473 | Lower extremity fascial plane block, unilateral; by injection(s), including imaging guidance, when performed |
| 64474 | Lower extremity fascial plane block; by continuous infusion(s), including imaging guidance, when performed |
| 64486 | TAP block, unilateral; by injection(s) |
| 64487 | TAP block, unilateral; by continuous infusion(s) |
| 64488 | TAP block, bilateral; by injection(s) |
| 64489 | TAP block, bilateral; by continuous infusion(s) |
| 64510 | Injection, anesthetic agent; stellate ganglion (cervical sympathetic) |
| 64520 | Injection, anesthetic agent; lumbar or thoracic (paravertebral sympathetic) |
| 64680 | Destruction by neurolytic agent, with or without radiologic monitoring; celiac plexus |
| 64483 | Injection(s), anesthetic agent(s) and/or steroid; transforaminal epidural, with imaging guidance — L4-L5 spinal block |
| 64484 | Transforaminal epidural, with imaging guidance; lumbar or sacral, each additional level — L4-L5 spinal block |
Not Covered CPT Codes
| Code | Description | Reason |
|---|---|---|
| 64417 | Injection(s), anesthetic agent(s) and/or steroid; axillary nerve, including imaging guidance, when performed | Not covered for indications listed in CPB 0863 |
| 64451 | Injection(s), anesthetic agent(s) and/or steroid; nerves innervating the sacroiliac joint, with imaging guidance | Not covered for indications listed in CPB 0863 |
| 64454 | Injection(s), anesthetic agent(s) and/or steroid; genicular nerve branches, including imaging guidance | Not covered for indications listed in CPB 0863 |
| 64461 | Paravertebral block (PVB), thoracic; single injection | Not covered for indications listed in CPB 0863 |
| 64462 | Paravertebral block (PVB), thoracic; each additional injection | Not covered for indications listed in CPB 0863 |
| 64505 | Injection, anesthetic agent; sphenopalatine ganglion | Not covered for indications listed in CPB 0863 |
| 64517 | Injection, anesthetic agent; superior hypogastric plexus | Not covered for indications listed in CPB 0863 |
| 64624 | Destruction by neurolytic agent, genicular nerve branches, including imaging guidance | Not covered for indications listed in CPB 0863 |
| 76942 | Ultrasonic guidance for needle placement, imaging supervision and interpretation | Not covered for indications listed in CPB 0863 |
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