ModifiedCentenePolicy CP MP.171

Clinical Policy: Facet Joint Interventions

Clinical coverage and criteria for diagnostic and therapeutic facet joint injections and radiofrequency neurotomy for cervical and lumbar spine, including requirements for conservative therapy, imaging guidance, frequency limits, and coding; applies to members of Centene-affiliated health plans.

Policy Summary

PayerCentene

PolicyClinical Policy: Facet Joint Interventions

Policy CodePolicy CP MP.171

Change TypeCriteria and coding revisions (material)

Effective Date

Next Review Date

Key ActionObtain prior authorization and document conservative therapy and ≥80% pain relief from diagnostic block(s) before requesting conventional radiofrequency neurotomy.

SourceLink

POLICY UPDATE CHANGES

Pain relief threshold for diagnostic medial branch blocks and for radiofrequency neurotomy candidacy updated to 80% (from 75%).

Physical therapy/prescribed home exercise requirement clarified to four weeks (was previously six weeks or variable).

Several ultrasound-guided CPT codes (0214T, 0215T, 0217T, 0218T) were removed from the coding table.

A second block at the same level is specified as not medically necessary when the first provides ≥80% relief.

Criteria for duration of neck or back pain revised to require at least three months for certain criteria and at least six months for others.

Therapeutic facet joint injections added as medically necessary when meeting updated Criteria I.D.1 through I.D.4.

80%pain relief threshold defining a positive diagnostic block

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Coverage Criteria for Facet Joint Interventions

Initial diagnostic injections

Covered when ALL of the following are met:

Diagnostic injections criteria: 1) Up to two controlled medial branch blocks/facet joint injections in the lumbar and cervical regions; 2) Symptoms (neck or back pain) interfering with activities of daily living (ADLs) present for at least 3 months; 3) Failed conservative therapy within the past year including: a) NSAIDs for at least 3 weeks or documented contraindication/intolerance; b) At least 4 weeks of physical therapy or a prescribed home exercise program or documentation of inability to tolerate (physical therapy/home exercise may be omitted if a facet joint synovial cyst causes nerve root compression with moderate to severe radicular symptoms and associated functional limitations); 4) Clinical findings suggest facet joint syndrome and imaging excludes other obvious causes of pain (e.g., fracture, tumor, infection, extraspinal lesion) and pain is not associated with radiculopathy or myelopathy (except radiculopathy caused by a facet joint synovial cyst); 5) No more than three spinal levels (unilateral or bilateral) treated per session; 6) If a second injection is performed it should confirm validity of the positive response (≥80% relief) and injections should be given at least two weeks apart.

Conventional radiofrequency neurotomy

Covered when ALL of the following are met:

Initial RF neurotomy: 1) Neck or back pain present for at least 3 months; 2) Positive response to two diagnostic controlled facet joint injections/medial branch blocks at each region to be treated, demonstrated by at least 80% pain relief; 3) No more than three spinal levels (unilateral or bilateral) treated per session.

Repeat RF neurotomy: 1) Previous conventional radiofrequency neurotomy provided at least 50% relief for a minimum of 6 months with associated functional improvement; 2) At least 6 months have elapsed since the prior treatment; 3) No more than three spinal levels (unilateral or bilateral) treated per session.

Therapeutic facet joint injections

Covered when ALL of the following are met:

Therapeutic injections: 1) Positive response to two diagnostic controlled facet joint injections/medial branch blocks at each region to be treated, demonstrated by at least 80% pain relief; 2) Subsequent therapeutic facet joint procedures at the same anatomic site result in at least 50% pain relief for a minimum of 3 months or at least a 50% consistent improvement in ability to perform previously painful movements and ADLs compared to baseline using the same measurement scale; 3) Documentation explaining why radiofrequency neurotomy is not an appropriate option when applicable; 4) No more than three spinal levels (unilateral or bilateral) treated per session.

Updated medical necessity highlights

Coverage is conditioned on meeting updated clinical criteria; notable updates summarized below.

Pain relief requirement: Diagnostic or therapeutic facet joint blocks must demonstrate >=80% pain relief for coverage decision points that previously required 75% relief.>=80%

Policy language updated to specify that a second block at the same level is not medically necessary when the first produces the requisite relief.

Duration of symptoms: Neck or back pain must be present for at least 3 months for certain criteria (e.g., Criteria L.B) and at least 6 months for other criteria (e.g., Criteria I.B.2.b).3 months or 6 months depending on criteria

Conservative therapy durations and symptom-duration thresholds revised in this update.

Therapeutic injections: Therapeutic facet joint injections are explicitly included as medically necessary when Criteria I.D.1 through I.D.4 are met under the revised policy.

Facet joint injections and conventional radiofrequency neurotomy of the thoracic region are not medically necessary because effectiveness has not been established for thoracic facet procedures. The policy explicitly lists thoracic facet joint injections and thoracic conventional radiofrequency neurotomy as not medically necessary and notes the need for further well‑designed randomized controlled trials to evaluate effectiveness.

A second diagnostic block performed at the same spinal level is specified as not medically necessary in the updated criteria. The revision operationalizes this restriction alongside an increased diagnostic pain‑relief threshold of 80% for blocks used to establish facet joint pain.

Pulsed radiofrequency neurotomy of the facet joints is considered not medically necessary due to insufficient high‑quality evidence. The policy states available evidence is largely from retrospective case series and that additional well‑designed randomized controlled trials with adequate sample size and long‑term follow‑up are needed to determine clinical efficacy and long‑term outcomes.

Repeat diagnostic medial branch/facet joint block at the same level (i.e., a second block at the same anatomic level) is designated not medically necessary. The update clarifies that confirmatory testing should not include a second block at the identical level as part of the coverage pathway.

Coding and Billing

Covered CPT Codes - facet injectionsCPTCovered

64490	Injection(s), diagnostic or therapeutic agent, paravertebral facet (zygapophyseal) joint (or nerves innervating that joint) with image guidance (fluoroscopy or CT), cervical or thoracic; single level.
64491	Injection(s) , diagnostic or therapeutic agent, paravertebral facet (zygapophyseal) joint (Or nerves innervating that joint) with image guidance (fluoroscopy or CT), cervical o thoracic; second level (List separately in addition to code for_primary_ procedure).
64492	Injection(s), diagnostic or therapeutic agent, paravertebral facet (zygapophyseal) joint (Or nerves innervating that joint) with image guidance (fluoroscopy or CT), cervical o thoracic; third and any additional level(s) (List separately in addition to code for primary_procedure).
64493	Injection(s) , diagnostic or therapeutic agent, paravertebral facet (zygapophyseal) joint (Or nerves innervating that joint) with image guidance (fluoroscopy or CT), lumbar o sacral;_single _level.
64494	Injection(s), diagnostic or therapeutic agent, paravertebral facet (zygapophyseal) joint (or nerves innervating that joint) with image guidance (fluoroscopy o CT), lumbar O.
64495	Injection(s), diagnostic or therapeutic agent, paravertebral facet (zygapophyseal) joint (or nerves innervating that joint) with image guidance (fluoroscopy or CT), lumbar or sacral; third and any additional level(s) (List separately in addition to code for primary procedure_

Covered CPT Codes - neurotomy/denervationCPTCovered

64633	Destruction by neurolytic agent, paravertebral facet joint nerve(s), with imaging.
64634	Destruction by neurolytic agent, paravertebral facet joint nerve(s), with imaging guidance (fluoroscopy or CT); cervical or thoracic, each additional facet joint (List separatelyin addition_to_code for_primary_procedure).
64635	Destruction by neurolytic agent, paravertebral facet joint nerve(s), with imaging guidance (fluoroscopy or CT); lumbar Or sacral,single facet joint.
64636	Destruction by neurolytic agent, paravertebral facet joint nerve(s), with imaging guidance (fluoroscopy or CT); lumbar or sacral, each additional facet joint (List separately_in addition to_code_for_primary_procedure_

CPT Codes that do not support coverage (ultrasound guidance)CPTNot Covered

0213T	Injection(s), diagnostic or therapeutic agent, paravertebral facet (zygapophyseal) joint (or nerves innervating that joint) with ultrasound guidance, cervical or thoracic; single level.
0216T	Injection(s) , diagnostic or therapeutic agent, paravertebral facet (zygapophyseal) joint (or nerves innervating that joint) with ultrasound guidance, lumbar Or sacral; single level

Removed CPT CodesCPTNot Covered

0214T	CPT code (removed) — previously listed in coding table
0215T	CPT code (removed) — previously listed in coding table
0217T	CPT code (removed) — previously listed in coding table
0218T	CPT code (removed) — previously listed in coding table

inv-13: Diagnostic block pain relief threshold

Diagnostic block pain relief threshold>= 80% pain relief required to be considered a positive diagnostic medial branch/facet joint injection

Previous threshold (context)Policy revised from 75% to 80% for specified diagnostic/therapeutic blocks

Use for candidate selectionPositive diagnostic block (>=80%) required before proceeding to conventional radiofrequency neurotomy per criteria

inv-14: Minimum duration of relief to qualify for repeat RF

Minimum duration of relief to qualify for repeat RF>= 6 months of pain relief following prior RF with associated functional improvement

Prior Authorization, Documentation, and Provider Requirements

Prior Authorization

Prior Authorization Required

Prior Authorization is required for all covered CPT codes for facet joint injections and radiofrequency neurotomy prior to scheduling the procedure. Submit a prior authorization request that includes diagnosis, proposed CPT codes, and clinical documentation supporting medical necessity.

Prior authorization must be obtained for covered CPT codes listed in the policy (see covered codes).
Do not use CPT codes listed as not supporting coverage (e.g., 0213T, 0216T) — these are not covered and will be denied.

Billing Rule

Coding and Documentation for Prior Authorization

Include appropriate CPT/ICD-10 coding and complete clinical documentation with the PA submission. Coding should reflect the billed facet joint injection or neurotomy procedure and the anatomic level(s) treated. If multiple levels are billed, submit justification for each additional level.

Conservative Management Before Invasive Procedures

Must document prior conservative therapy or specific reason for omission (e.g., synovial cyst with nerve root compression).

Documentation of conservative therapy is required unless a specific clinical reason for omission is documented (e.g., facet joint synovial cyst causing nerve root compression with moderate to severe radicular symptoms and functional limitation).

Conservative therapy prior to procedures: 1) Documented trial within the past year of conservative therapies including: a) Trial of NSAIDs for at least 3 weeks or documentation of contraindication/intolerance; b) At least 4 weeks of physical therapy or a prescribed home exercise program or documentation of inability to tolerate; c) Evidence of symptom duration (neck or back pain) interfering with ADLs for at least 3 months when applicable;

Exceptions to PT/home exercise requirement: Physical therapy or prescribed home exercise may be omitted when a facet joint synovial cyst is causing nerve root compression with moderate to severe radicular symptoms and associated functional limitations; the clinical reason for omission must be documented.

Documentation of trial of conservative therapies (PT/home exercise) for required duration per applicable criteria.

Frequency and Re-treatment Limits

inv-30: facet injections, RF neurotomy — no more than three spinal levels treated per session (unilateral or bilateral).

Spinal levels per sessionNo more than three spinal levels (unilateral or bilateral) may be treated in a single session for facet injections or RF neurotomy

Applies to proceduresLimit applies to both diagnostic/therapeutic facet injections and conventional radiofrequency neurotomy

DocumentationLevel(s) treated must be documented for prior authorization and medical necessity review

inv-31: conventional radiofrequency neurotomy — repeat permitted if prior relief ≥6 months and ≥50% functional improvement; at least 6 months since prior treatment.

Repeat conventional RF neurotomy criteriaRepeat conventional RF permitted when prior RF provided >=50% relief for at least 6 months with associated functional improvement

Imaging Guidance and Diagnostic Exclusions

Billing Rule

Perform facet procedures with fluoroscopy or CT imaging guidance

Facet injections and radiofrequency neurotomy should be performed under fluoroscopy or CT guidance; ultrasound guidance is not supported by the policy for coverage.

Perform procedures with fluoroscopy or CT per policy.
Ultrasound guidance evidence is limited; CPT ultrasound codes do not support coverage.

Documentation Required

Document imaging to exclude other causes and note synovial cyst considerations

Include imaging that excludes other obvious causes of pain (e.g., fracture, tumor, infection, extraspinal lesion) in the documentation supporting facet joint interventions; note policy language referencing facet joint synovial cyst when applicable.

Document imaging that rules out fracture, tumor, infection, or extraspinal lesion.
If a facet joint synovial cyst is present, document its relevance (e.g., nerve root compression) and how it affects conservative therapy requirements.

Background

Facet joint pain of the lumbar and cervical spine is a recognized contributor to chronic low back and neck pain and is evaluated clinically using diagnostic medial branch blocks or facet joint injections. Diagnostic blocks are used to identify candidates for conventional radiofrequency neurotomy, which delivers radiofrequency energy via percutaneous needles under fluoroscopy or CT guidance to disrupt facet joint nerve conduction and provide temporary pain reduction. The policy requires documentation of symptom duration (commonly ≥3 months for many criteria), conservative therapy trials (including NSAIDs and ≥4 weeks of physical therapy or a prescribed home exercise program unless specifically exempted, e.g., facet joint synovial cyst with nerve root compression), and objective relief from diagnostic blocks (updated threshold of ≥80% pain relief) to establish medical necessity for neurotomy or therapeutic injections.

Definitions

inv-26: Radiofrequency neurotomy definition

DefinitionRadiofrequency neurotomy (also known as radiofrequency ablation) delivers radiofrequency energy via percutaneous needles to targeted facet joint nerves to disrupt nerve conduction and reduce pain signals

GuidanceProcedure is performed under fluoroscopy or CT guidance per policy

IndicationsUsed for cervical and lumbar facet joint pain when diagnostic blocks demonstrate sufficient relief

inv-27: Facet joint synovial cyst definition / mention

Definition / clinical noteFacet joint synovial cyst: noted in policy as a condition where physical therapy or prescribed home exercise may be omitted when the cyst causes nerve root compression with moderate to severe radicular symptoms and associated functional limitations

Imaging and exclusion

Services Not Covered

Not covered items include: thoracic facet joint interventions (both injections and conventional radiofrequency neurotomy) because effectiveness is not established; pulsed radiofrequency neurotomy of facet joints due to insufficient evidence; ultrasound‑guided facet injection CPT codes do not support coverage; and a second diagnostic block at the same level is specified as not medically necessary. The coding table revisions also removed CPT codes 0214T, 0215T, 0217T, and 0218T from the policy’s coding list.

Policy Summary

PayerCentene

PolicyClinical Policy: Facet Joint Interventions

Policy CodePolicy CP MP.171

Change TypeCriteria and coding revisions (material)

Effective Date

Next Review Date

Key ActionObtain prior authorization and document conservative therapy and ≥80% pain relief from diagnostic block(s) before requesting conventional radiofrequency neurotomy.

SourceLink

On This Page

inv-16: Conservative therapy duration (3 or 6 months depending on criteria)

Conservative therapy duration (Criteria L.B)At least 3 months of symptoms and prior conservative therapy as specified in Criteria L.B

Conservative therapy duration (Criteria I.B.2.b)At least 6 months for certain criteria subsets per updated policy

Minimum physical therapy/home exercise trial>= 4 weeks of physical therapy or prescribed home exercise program (or documented inability to tolerate); PT may be omitted if facet joint synovial cyst causes nerve root compression with moderate–severe radicular symptoms

Documentation Required

Required Documentation

Provide documentation that demonstrates the criteria for medical necessity are met, including symptom duration, prior conservative therapy trials, reason for omission of therapies when applicable, diagnostic block results, and prior procedure response when relevant.

Symptom duration: neck or back pain present for ≥ 3 months.
Conservative therapy: documentation of failure to respond within the past year, including NSAID trial (≥ 3 weeks or documented contraindication/intolerance) and ≥ 4 weeks of physical therapy or a prescribed home exercise program, or documentation why PT/home exercise cannot be tolerated or is not appropriate (e.g., facet joint synovial cyst causing nerve root compression).
If conservative therapies were omitted, provide a clear rationale in the record (e.g., intolerance, contraindication, or anatomic reason documented in imaging).
For repeat procedures, document prior response and duration of relief (see neurotomy repeat criteria).

Documentation Required

Diagnostic Block Requirement

A diagnostic controlled medial branch block or facet joint injection is required to confirm the pain source prior to conventional radiofrequency neurotomy. The documented response must show ≥ 80% pain relief to be considered a positive diagnostic response. If a second diagnostic injection is performed to confirm the result, it must be at the same level(s) and given at least two weeks after the first injection.

Up to two controlled diagnostic blocks/injections are allowed in the lumbar and cervical regions when criteria are met.
A second injection (when performed) is only medically necessary if it is at the same level(s) to confirm ≥ 80% relief from the initial injection; injections should be spaced at least two weeks apart.

Duration per criteria subset: 1) Where specified by the criteria subset, document at least 3 months of symptoms and conservative care (Criteria L.B); 2) For other criteria subsets (e.g., Criteria I.B.2.b), document at least 6 months as required by the updated criteria.

Content of conservative therapy documentation: Include dates, modalities and duration of physical therapy or prescribed home exercise, NSAID trial (duration and response), reasons patient could not tolerate therapies when applicable, and any imaging or clinical findings that justify omission or alteration of conservative therapy requirements.