CareSource Facet Joint Interventions Coverage Update

Coverage Criteria

Initial diagnostic medial branch nerve blocks

Medial branch nerve block injections — covered when ALL of the following are met

Medial Branch Nerve Block Initial Diagnostic Criteria: 1. Initial diagnostic block confirms facet joint as source of spinal pain and provides 80% or greater primary pain relief with duration of relief consistent with the agent used; 2. A second diagnostic block confirms validity of the initial injection and is injected at the same level where the initial produced a positive response; 3. Each diagnostic block may treat up to 3 spinal levels (unilateral or bilateral) for a maximum of 6 spinal levels per spinal region per session; 4. Radiofrequency ablation is being considered as a therapeutic intervention; 5. Injections should be at least 2 weeks apart; 6. Imaging studies and physical exam have ruled out other causes of spinal pain (eg, fracture, tumor, infection, herniated disk, spinal stenosis, significant deformity); 7. Patient history demonstrates at least 3 months of moderate to severe pain with functional impairment that has not adequately responded to active and inactive conservative therapy; 8. Failure of conservative therapy evidenced by ALL: (a) documentation of at least 6 weeks of active conservative therapy within the past 6 months OR documented inability to complete active therapy due to contraindication, increased pain, or intolerance, and (b) documentation of at least 6 weeks of inactive conservative therapy within the past 6 months; 9. No coagulopathy; 10. No current infection at the injection site.

Up to 2 diagnostic blocks allowed

RFA coverage criteria

Radiofrequency Ablation (RFA) — Initial and Repeat criteria

Initial RFA: In the past 36 months: (a) The clinical criteria for diagnostic blocks (I.A.1-10) have been met; (b) Two successful medial branch nerve block injections were performed at the same spinal region and side and achieved 80% or more pain relief.

Repeat RFA: In the past 36 months: (a) Prior successful single or multilevel facet RFA in the same spinal region and side provided at least 50% pain relief over a minimum of 6 months; (b) The most recent RFA was at least 6 months prior; (c) No more than 4 RFAs per rolling 12 months (2 left and 2 right per spinal region) are considered appropriate.

Inconclusive or non-supportive evidence

Not medically necessary / unproven interventions

Unproven/Not Medically Necessary: Medial branch nerve block injections are unproven for the treatment of chronic spinal pain (routine therapeutic injections will not be authorized); Intra-articular facet joint injections for neck and back pain are not considered medically necessary; Intra-articular facet joint injections do not qualify as diagnostic information for a proposed neurotomy.

Sedation policy

Sedation

Sedation: Neither conscious sedation nor monitored anesthesia care (MAC) is routinely necessary for intra-articular facet joint injections or medial branch blocks and are not routinely reimbursable; individual consideration may be given for payment in rare unique circumstances if the medical necessity of sedation is unequivocal and clearly documented.

Intra-articular facet joint injections for neck and back pain are not considered medically necessary. The evidence does not support their efficacy for diagnostic or therapeutic purposes in these conditions, and intra-articular injections do not qualify as diagnostic information for proposed neurotomy.

Routine therapeutic medial branch nerve block injections for chronic spinal pain are considered unproven and will not be authorized. Medial branch nerve block injections are not supported as a stand-alone long-term treatment for chronic spinal pain in the absence of appropriate diagnostic intent and procedural context.

Coding and Thresholds

inv-07: Successful diagnostic block pain relief

Threshold for successful diagnostic block>= 80% reduction in primary pain within the anesthetic duration

ScopeApplies to initial medial branch nerve block confirming facet joint as pain source

DocumentationDuration of relief must be consistent with the agent employed

inv-08: Prior RFA effectiveness for repeat RFA

Threshold to qualify for repeat RFA>= 50% pain relief

Minimum duration of relief requiredAt least 6 months of sustained pain relief following prior RFA

Provider Actions and Documentation Requirements

Prior Authorization

Prior Authorization Required

Prior authorization is required for diagnostic medial branch nerve blocks and radiofrequency ablation (RFA). Submit a prior authorization request before scheduling procedures to ensure coverage and reduce denial risk.

Prior authorization required for medial branch nerve blocks (up to 2 diagnostic blocks) and RFA.
RFA considered only when diagnostic blocks demonstrate 80% or greater pain relief and RFA is being considered as the therapeutic intervention.

Prior Authorization

Conservative Therapy and Diagnostic Block Prerequisites

Conservative therapy and diagnostic block prerequisites must be documented prior to authorization for RFA. Ensure the medical record demonstrates failure of conservative therapy and proper sequencing and timing of diagnostic blocks.

Document at least 3 months of moderate to severe pain with functional impairment.
Evidence of failure of conservative therapy: either (a) ≥6 weeks of active conservative therapy within the past 6 months OR documented inability to complete active therapy due to contraindication/intolerance, AND (b) ≥6 weeks of inactive conservative therapy within the past 6 months.

Conservative Treatment Requirements

Both active and inactive conservative therapy documented unless contraindicated

Covered when ALL of the following are met:

Conservative Therapy Requirement: Patient has at least 3 months of moderate to severe pain with functional impairment; failure of conservative therapy evidenced by documentation of at least 6 weeks of active conservative therapy within the past 6 months OR documented inability to complete active therapy, AND documentation of at least 6 weeks of inactive conservative therapy within the past 6 months.6 weeks active + 6 weeks inactive within past 6 months; overall pain duration >= 3 months

Active and inactive conservative therapies defined in policy (eg, physical therapy, HEP, rest, TENS).

Frequency and Procedural Limits

inv-19: Radiofrequency ablation — no more than 4 RFAs per rolling 12 months (2 left and 2 right per spinal region)

Overall limitNo more than 4 RFAs per rolling 12 months

Side distributionMaximum of 2 left and 2 right RFAs per spinal region within the rolling 12 months

ApplicabilityLimit applies to repeat RFA consideration and documentation of prior procedures

inv-20: Medial branch nerve block injections — per-session and per-region spinal level limits (each diagnostic block may treat up to 3 spinal levels for a maximum of 6 spinal levels per spinal region per session)

Per-block spinal level limitEach diagnostic block may treat up to 3 spinal levels (unilateral or bilateral) per session

Per-region per-session maximum

Imaging Requirements

Billing Rule

Use fluoroscopy or CT guidance for medial branch nerve blocks

Perform medial branch nerve block injections using fluoroscopy or computed tomography guidance; imaging and physical exam must also have ruled out other causes of spinal pain prior to intervention.

Policy states: “Medial branch nerve block injections should be performed with fluoroscopy or computed tomography.”
Documentation must show imaging studies and physical exam ruled out fracture, tumor, infection, herniated disk, spinal stenosis, or significant deformity (policy I.A.6).

Not Covered / Exclusions

Not covered: Intra-articular facet joint injections for neck and back pain and routine therapeutic medial branch injections for chronic pain. These interventions are excluded from coverage due to limited or inconclusive evidence of clinical benefit for chronic spinal pain.

Definitions

inv-15: Conservative Therapy — definition and examples

DefinitionA multimodality plan of care including both active (eg, physical therapy, occupational therapy, supervised home exercise program) and inactive therapies (eg, rest, ice/heat, TENS, pharmacotherapy)

Active therapy examplesPhysical therapy, occupational therapy, physician-supervised home exercise program (HEP)

Inactive therapy examplesRest, ice/heat, medical devices, TENS, prescription or over-the-counter pharmacotherapy

inv-16: Successful Diagnostic Injection — definition (eg, >80% reduction within anesthetic duration)

DefinitionAn injection that achieves greater than 80% reduction in pain within the duration of effectiveness for the anesthetic used

Timing

Background

Facet-mediated pain is commonly evaluated using medial branch nerve blocks as a diagnostic tool; however, evidence for therapeutic benefit of medial branch injections is inconclusive. Consequently, medial branch nerve block injections are supported primarily in a diagnostic role rather than as routine therapy for chronic spinal pain, and intra-articular facet injections are not considered medically necessary.

Revision History

2026-05-01Effective DateLatest

Policy effective as of 05/01/2026 following committee approval and prior review updates.

2026-02-11Review

Reviewed; language changed from 'physician' to 'provider', dates of service documentation language removed, and related policies added; approved at Committee.

2025-04-09Review

Annual review with updated references; approved at Committee.

OpenPayer

Facet Joint Interventions — Arkansas PASSE