Prior approval required

Prior approval is required. Use the Wellmark Authorization Table to determine applicable prior approval requirements for the procedure code(s) and apply InterQual® clinical criteria to support medical necessity.

Prior authorization: include conservative therapy, rationale, evidence

When requesting authorization, include documentation of prior conservative therapies, the clinical rationale for the proposed ablative or chemical neurolysis procedure, and the level of supporting evidence (preference for controlled trials with ≥6 months outcomes).

Document prior conservative therapy

Document prior conservative therapy trials and responses; conservative therapy is the comparator and should be shown before considering ablative or surgical interventions.

• Examples: pharmacologic therapies, nerve blocks, physical therapy, TENS, cervical collar, exercise, relaxation techniques

Prior authorization recommended for surgical procedures

For surgical decompression, neurectomy, or peripheral nerve procedures, document prior conservative treatments attempted, trigger-site confirmation (e.g., diagnostic block or botulinum toxin response), and specialist evaluation; prior authorization is recommended when available.

• Specialist evaluation from neurosurgeon, neurologist, or pain specialist
• Evidence of trigger-site identification (diagnostic block or botulinum toxin response)

Prior authorization: required documentation elements

Prior authorization submissions should document that conservative treatments were attempted and include the diagnostic rationale, baseline and prior pain scores, prior nerve block results, and discussion of evidence limitations for the proposed surgical procedure.

• Diagnostic rationale and prior nerve block outcomes
• Baseline pain measures (e.g., VAS/NRS) and prior response data
• Discussion of limited high-quality evidence for the procedure

Follow payer prior authorization processes

If specific prior authorization requirements are not detailed in this policy section, follow the payer's standard prior authorization processes and submit coding and clinical documentation per the policy and the Wellmark Authorization Table.

Conservative therapy expected and should be documented

Conservative treatments are expected comparators and should be attempted and documented prior to more invasive ablative or surgical procedures.

• Document trials and responses to conservative measures

Preferred initial conservative management

Preferred initial conservative management includes oral analgesics and antiinflammatories, tricyclic antidepressants or anticonvulsants, nerve blocks, physical therapy, TENS, cervical collar in the acute phase, and manual therapy prior to surgical treatments.

• Oral analgesics, NSAIDs
• TCAs, anticonvulsants
• Nerve blocks and steroid injections
• Physical therapy, TENS, manual therapy

Conservative-first: try medical management and injections first

Attempt medical management (including appropriate pharmacotherapy) and diagnostic or therapeutic local injections (e.g., corticosteroid or local anesthetic block) before considering invasive or destructive procedures.

Document prior diagnostic nerve block response before surgery

Diagnostic nerve blocks are referenced as predictive for short-term response; documentation of prior successful diagnostic blocks is commonly used to support proceeding to ablative or surgical interventions.

• Provide details of block technique, agent used, and objective response

Use Authorization Table and InterQual criteria for codes/coverage

Refer to the Wellmark Authorization Table and InterQual® criteria for applicable procedure codes and the medical necessity clinical coverage criteria when requesting authorization.

Document diagnosis plus prior treatments and responses

Establish the specific diagnosis (occipital neuralgia, cervicogenic headache, or PIFP) with clinical history, physical exam findings, and documentation of prior conservative treatments and their outcomes.

• History and exam consistent with diagnosis
• Results of prior conservative therapy trials

Record pre/post pain measures and functional status

Document baseline and post-treatment pain severity using validated measures (e.g., VAS or NRS) and functional status (eg, 12- or 36-item SF), and plan appropriate follow-up to assess procedural success and durability.

• Pre- and post-procedure VAS/NRS scores
• Functional status measures and follow-up timeline

Provide pre/post assessments and trigger-site identification

Required clinical documentation should include preoperative and postoperative pain assessments (VAS, migraine journals, Migraine Headache Index, MIDAS) and documentation of trigger-site identification such as response to botulinum toxin or local anesthetic block.

• Migraine journals or headache diaries
• Trigger-site confirmation (botulinum toxin or anesthetic block)

Include case-series style supporting documentation (pain scores, follow-up, block results)

Supporting documentation commonly reported in surgical case series includes pre- and post-operative pain scores, duration of follow-up, and documentation of diagnostic nerve block response; include these elements when available to support medical necessity.

• Pre/post pain scores and follow-up duration
• Diagnostic block response details

Use appropriate procedure and diagnosis codes

Use the appropriate CPT, HCPCS, revenue, and ICD diagnosis codes listed in the policy coding section when reporting provider services for these procedures.

Investigational procedures may be denied

Procedures designated investigational (ablative and surgical treatments listed) are not supported by sufficient evidence and may be denied as investigational if submitted without compelling justification.

Insufficient RCT evidence may trigger denial

Lack of high-quality randomized controlled trial evidence for some indications (for example, RFA for chronic occipital neuralgia) may lead to denial or requests for additional justification.

Preference for RCTs ≥6 months — lack may risk denial

The policy prefers randomized controlled trials with a minimum of 6 months outcomes to establish efficacy; absence of such trials or inadequate follow-up may result in unfavorable coverage determinations.

Incomplete selection or trigger-site documentation risks denial

Inadequate documentation of trigger-site identification, lack of standardized patient selection, or absence of controlled evidence may lead to denial or requests for additional documentation.

• Ensure transparent patient selection and documented trigger-site confirmation

Evidence limitations for surgical procedures may lead to denial

Lack of high-quality RCT evidence for many surgical procedures (including no RCTs for occipital neuralgia) may lead to coverage denial or requirement for strong individualized justification.

Policy review cycle and administrative denial risk

Policy is periodically reviewed and renewed; absence of required documentation or failure to meet stated criteria may increase the risk of denial at review time.

No specific imaging requirements — consult Authorization Table/InterQual

No specific imaging requirements are detailed in this section; consult the Wellmark Authorization Table and InterQual criteria for imaging expectations for the procedure code.

Use imaging to exclude alternative diagnoses for PIFP when indicated

For PIFP, imaging to exclude alternative diagnoses (e.g., x-ray, CT, MRI) is appropriate prior to ablative procedures where indicated, since diagnostic imaging typically does not show abnormalities but may rule out other causes.

Document neuronavigation technique and outcomes when used

When neuronavigator-guided radiofrequency is used, document the navigation technique and related outcomes, as studies reported improved immediate and sustained relief with navigation versus control.

• Specify neuronavigation method and outcome measures in the record

No explicit imaging mandate for decompression/neurolysis — document imaging if obtained

No explicit imaging requirement is stated for decompression or neurolysis procedures in this section; provide preoperative imaging/blocks if used for diagnostic confirmation.

Include intraoperative evaluation and preop imaging/blocks in surgical reports

Surgical reports for decompression and ganglionectomy often reference intraoperative evaluation and preoperative imaging or diagnostic blocks; include these details when available to support medical necessity.

• Intraoperative findings (e.g., nerve-artery intersections)
• Preoperative imaging or diagnostic block results

Document imaging guidance when billing CPT 64633

When CPT 64633 (destruction by neurolytic agent, paravertebral facet joint nerve) is specified, imaging guidance (fluoroscopy or CT) is referenced and should be documented.

• Document use of fluoroscopy or CT guidance when billing CPT 64633