Occipital block diagnostic documentation

Document nerve distribution pain, required pain characteristics (at least two of three), dysesthesia/allodynia, and tenderness or trigger point to meet initial diagnostic criteria. Affected CPT code: 64405.

• Required documentation: nerve distribution, ≥2 of 3 pain characteristics, dysesthesia/allodynia, and tenderness or trigger point
• Affected code: 64405

Limit on number of injections

Ensure no more than four occipital injections (including the diagnostic injection) are provided within any 12-month period. Applicable CPT codes: 64405 and 64999 (unlisted nervous system procedure as applicable).

• Limit: ≤4 injections per 12 months (diagnostic injection counts toward limit)
• Referenced codes: 64405, 64999

Therapeutic block response

For therapeutic occipital blocks, document temporary relief from the prior injection (e.g., decreased numeric pain rating) and at least three months of conservative therapy including heat/rest/physical therapy (including massage), NSAIDs unless contraindicated, oral anticonvulsants or tricyclic antidepressants, and activity modification. Affected CPT code: 64405.

• Document temporary relief from prior injection (pain score reduction)
• Document ≥3 months of conservative therapies (heat/rest/PT/massage; NSAIDs; anticonvulsants or tricyclics; activity modification)
• Affected code: 64405

Sympathetic block repeat requirement for CRPS

When requesting additional sympathetic blocks beyond the first or second for CRPS, document that prior block produced an immediate positive response (e.g., improved temperature of ≥1.5°C and decreased pain) and that additional blocks are spaced at least one week apart. Affected CPT codes: 64510, 64520.

• Document immediate positive response to prior block (example: ≥1.5°C temperature improvement and pain decrease)
• Document blocks given at least 1 week apart
• Affected codes: 64510, 64520

Celiac plexus neurolysis criteria

Document diagnosis of pancreatic cancer with severe visceral abdominal/back pain and inadequate analgesia or intolerable opioid side effects, and absence of somatic spread (peritoneum/diaphragm). For chronic pancreatitis, document refractory pain with a non-dilated pancreatic duct and clinical benefit from the initial block. Repeat celiac plexus block for chronic pancreatitis is medically necessary only if ≥3 months have passed since the prior injection and there was documented benefit. Affected CPT codes: 64530, 64680.

• Pancreatic cancer criteria: diagnosis, severe visceral pain, opioids ineffective or intolerable, no somatic spread
• Chronic pancreatitis: refractory pain with non-dilated duct and documented benefit from prior block
• Repeat interval for chronic pancreatitis: ≥3 months since prior injection with documented benefit
• Affected codes: 64530, 64680

PNB during surgery

If peripheral/ganglion nerve blocks are administered as part of another surgical procedure, code per standard coding practice (examples include 64415, 64445, 64447, 64450) and do not submit them separately for prior authorization or separate payment.

• Example CPT codes: 64415, 64445, 64447, 64450
• Do not submit separately for prior authorization or separate payment when performed as part of another procedure

Non-covered indications

Claims for nerve blocks for indications deemed not medically necessary may be denied. Examples include occipital nerve blocks for migraine or cervicogenic headaches, sympathetic nerve blocks for ischemic limb pain, and peripheral nerve blocks for prevention or treatment of headaches (including migraine).

• Occipital blocks for migraine or cervicogenic headaches: not medically necessary
• Sympathetic blocks for ischemic limb pain: not medically necessary
• Peripheral blocks for headache prevention/treatment (including migraines): not medically necessary

Consult applicable NCDs/LCDs and state Medicaid provisions

Providers must review and apply all applicable Medicare NCDs, LCDs, and Medicare Coverage Articles prior to applying these criteria. For Medicaid members, state Medicaid coverage provisions take precedence when they conflict with this clinical policy.

• Review applicable Medicare NCDs, LCDs, and Coverage Articles before applying criteria
• State Medicaid provisions override this policy where conflicts exist

Clinical judgment and medical necessity

This clinical policy is a guide to medical necessity and does not dictate care or guarantee payment. Providers are expected to exercise professional medical judgment in treatment decisions.

• Policy guides medical necessity determinations but does not guarantee payment
• Providers retain responsibility for clinical judgment and treatment decisions

Policy adoption and effective date awareness

This clinical policy is effective as of the date determined by the Health Plan; the posting date may differ from the effective date. Legal and regulatory requirements govern if there is a discrepancy.

• Be aware effective date may differ from posting date
• If discrepancies exist, applicable law and regulation govern