ModifiedUnitedHealthcarePolicy CS001.S

Ablative Treatment for Spinal Pain

Defines UnitedHealthcare coverage stance on various ablative interventions for spinal pain (facet joint, sacroiliac, basivertebral nerve) and lists related procedure codes; applies to most states except those with state-specific policies listed. Affects providers seeking authorization or reimbursement for ablative spinal procedures.

Policy Summary

PayerUnitedHealthcare

PolicyAblative Treatment for Spinal Pain

Policy CodePolicy CS001.S

Change TypeMaterial clarification + administrative edits

Effective DateApr 1, 2025

Next Review Date

Key ActionDocument prior conservative management (≥6 months when applicable) and diagnostic block responses and obtain prior authorization using the listed procedure codes where required.

SourceLink

POLICY UPDATE CHANGES

Removed definition of 'Conventional (Thermal) Radiofrequency Ablation'.

Updated Clinical Evidence and References sections to reflect the most current information.

Added language indicating this Medical Policy does not apply to Idaho and Kansas; refer to state-specific policy versions.

multipleunproven techniques

64628-64629BVN codes

mixedCRFA evidence

225

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SMART trial randomized

ID, KSstates excluded

Coverage Criteria for Ablative Spinal Procedures

inv-01: Not medically necessary / Unproven Ablative Treatments

Not medically necessary / unproven procedures:

Unproven ablative techniques: Pulsed radiofrequency ablation of the facet nerves (cervical, thoracic, lumbar), sacral nerve root, or dorsal root ganglion; endoscopic radiofrequency ablation/endoscopic rhizotomy; cryoablation (cryodenervation, cryoneurolysis, cryosurgery, cryoanesthesia); cooled radiofrequency ablation; chemical ablation (including alcohol, phenol, sodium morrhuate); laser ablation (pulsed, continuous, low level)

These are stated as unproven and not medically necessary due to insufficient evidence of efficacy.

inv-02: Evidence summaries and conditional findings

Evidence summaries and conditional notes (informational):

Cooled RFA for SIJ: Some randomized trials and HTA reports suggest CRFA may reduce pain and improve function up to 6–12 months for sacroiliac joint pain, but the overall body of evidence is low-quality and longer-term data are lacking

Mixed evidence; additional well-designed long-term studies are needed.

Cooled RFA versus traditional RFA for facet pain: Small randomized trials (e.g., McCormick 2019) showed numerically higher responder rates for CRFA at 6 months but differences were not statistically significant; evidence limited by small sample sizes

Inconclusive — larger trials required to determine superiority.

Pulsed RFA for radicular/facet pain: Available RCTs and case series are small and heterogeneous with limited long-term follow-up; evidence is insufficient to establish safety and efficacy

Policy considers pulsed RFA unproven/not medically necessary.

inv-03: Basivertebral nerve ablation (BVNA) coverage criteria (evidence-linked)

Covered when ALL of the following are met (evidence-summary driven criteria for BVNA where present in document):

Patient selection: Age ≥ 18 with chronic low back pain of vertebrogenic origin (non-radiating axial chronic low back pain) with Modic Type 1 or 2 changes between L3 and S1

Selection criteria used in randomized trials (SMART, INTRACEPT) and systematic reviews.

Duration and prior care: Symptoms refractory to conservative care for at least 6 months>=6 months

Trials (e.g., Khalil et al.) and guidance referenced required ≥6 months of symptoms and failed conservative management.

Diagnostic imaging and outcome measurement: Imaging demonstrating Modic Type 1 or 2 changes between L3 and S1 and documentation of baseline and planned follow-up using validated measures (ODI, VAS/NRS) with intent to assess outcomes such as ≥10-point ODI improvement or ≥50% pain reduction

inv-04: Thermal RFA for facet-mediated low back pain

Recommendations from NASS guidelines as cited:

Thermal RFA for lumbar zygapophyseal (facet) joint pain: Thermal radiofrequency ablation is suggested for patients with low back pain from the zygapophyseal joints; outcomes are more reliable when more stringent diagnostic criteria (e.g., confirmatory diagnostic blocks) are used and relief is durable for at least six months.

NASS Grade B recommendation; Level II–III evidence.

inv-05: Cooled RFA for sacroiliac joint pain

Cooled RFA for sacroiliac joint pain: Cooled radiofrequency ablation of the sacral lateral branch nerves and dorsal ramus of L5 may be considered for patients with sacroiliac joint pain diagnosed with dual diagnostic blocks.

NASS Grade C recommendation; Level IV–V evidence; evidence quality poor and additional research needed.

inv-06: Cryodenervation

Cryodenervation for zygapophyseal joint pain: There is insufficient evidence to make a recommendation for or against the use of cryodenervation for the treatment of zygapophyseal joint pain.

NASS Grade I — evidence insufficient or conflicting.

Ablation procedures specifically listed as unproven in this policy are excluded from medical necessity coverage because current evidence is insufficient to demonstrate consistent safety and efficacy. Examples include pulsed radiofrequency ablation (for facet nerves, sacral root, or dorsal root ganglion), endoscopic radiofrequency ablation/endoscopic rhizotomy, cryoablation (cryodenervation/cryoneurolysis/cryosurgery), cooled radiofrequency ablation, chemical ablation (e.g., alcohol, phenol, sodium morrhuate), and laser ablation. These techniques are designated as not medically necessary for treatment of spinal pain when reported outside the strict selection criteria and evidence contexts discussed elsewhere in this policy.

The policy considers laser ablation (laser neurolysis) to have insufficient evidence to establish safety and efficacy for treating spinal pain. Published data are limited to small case series and descriptive reports; well‑designed randomized trials with larger samples and longer follow‑up are needed to determine meaningful patient outcomes.

This Medical Policy applies to UnitedHealthcare standard benefit plans except where superseded by state‑specific policy. This policy does not apply to the states of Idaho and Kansas; refer to the applicable state‑specific policy versions for coverage determinations in those states.

Procedures explicitly listed in the policy as examples of unproven or not medically necessary ablative interventions include: pulsed radiofrequency ablation (for facet nerves, sacral root, or dorsal root ganglion), endoscopic radiofrequency ablation/endoscopic rhizotomy, cryoablation (cryodenervation/cryoneurolysis/cryosurgery/cryonanesthesia), cooled radiofrequency ablation, chemical denervation/chemical ablation (including alcohol, phenol, sodium morrhuate), and laser ablation (pulsed, continuous, or low‑level).

Intraosseous radiofrequency ablation targeting the basivertebral nerve (BVNA/Intracept) is described in the evidence base as having moderate‑quality supporting data in selected patients — specifically adults with chronic vertebrogenic low back pain and MRI‑documented Modic Type 1 or 2 changes between L3 and S1. Randomized and pooled analyses show short‑term improvements in function and pain for carefully selected patients, but some trials demonstrate small differences versus sham, and concerns about trial quality, sponsorship, and limited long‑term blinded data mean coverage is contingent on meeting strict selection and documentation criteria described elsewhere in this policy.

Conservative Care and Diagnostic Block Requirements

inv-32: Document prior conservative management and diagnostic/prognostic block response when applicable

Document prior conservative management and diagnostic/prognostic block response when applicable:

Conservative care documentation: Document prior non-surgical treatments attempted (e.g., pharmacotherapy, physical therapy, injections, chiropractic care) and response

Prior authorization and trial protocols typically require evidence of prior conservative management.

Diagnostic/prognostic block response: When relevant to the procedure, document results of diagnostic or prognostic blocks (e.g., medial branch blocks for facet procedures; sacroiliac diagnostic and prognostic lateral branch blocks), including degree of pain relief

Guidelines (NICE, ASIPP/ASRA) emphasize positive diagnostic block response prior to RFA when indicated.

inv-33: Document prior conservative care attempts for at least 6 months before BVNA

Document prior conservative care attempts for at least 6 months before BVNA:

Procedure Codes and Coding Clarifications

Applicable procedure codes and coding clarificationsCPT

22899	Unlisted procedure, spine [when used to report the Intracept procedure or cooled radiofrequency ablation]
27299	Unlisted procedure, pelvis or hip joint
64625	Radiofrequency ablation, nerves innervating the sacroiliac joint, with image guidance (i.e., fluoroscopy or computed tomography)
64628	Thermal destruction of intraosseous basivertebral nerve, including all imaging guidance; first 2 vertebral bodies, lumbar or sacral
64629	Thermal destruction of intraosseous basivertebral nerve, including all imaging guidance; each additional vertebral body, lumbar or sacral (List separately in addition to code for primary procedure)
64999	Unlisted procedure, nervous system (noted: to be used for Pulsed Radiofrequency Ablation)

Provider Actions: Authorization, Documentation, and Billing

Billing Rule

Procedure code reporting and likely prior authorization

Report pulsed radiofrequency ablation procedures using CPT 64999 when applicable and include documentation of imaging guidance and procedure details. For unlisted spine or pelvis procedures related to intraosseous basivertebral nerve procedures or cooled RFA, report the appropriate unlisted spine/pelvis code (e.g., 22899, 27299) with supporting operative notes. Prior authorization is frequently required — check plan-specific PA rules.

CPT 64999: Unlisted procedure, nervous system — use for pulsed RFA per CPT Assistant guidance
22899: Unlisted procedure, spine — may be used for Intracept or cooled RFA reporting
27299: Unlisted procedure, pelvis or hip joint

Prior Authorization

Prior authorization: verify conservative care, diagnostic blocks, and frequency

Imaging and Procedural Guidance

Billing Rule

Document image guidance and bill with image‑guided CPT codes

Image guidance is commonly used for these procedures; billing and documentation should reflect imaging use and appropriate image‑guided CPT codes such as 64625 for sacroiliac nerve RFA and 64628/64629 for intraosseous basivertebral nerve RFA when applicable.

Include imaging modality and guidance documentation (fluoroscopy or CT) in the procedure note.
Use CPT 64625 for image‑guided sacroiliac nerve RFA and CPT 64628/64629 for intraosseous basivertebral nerve ablation when those services are provided.

Documentation Required

BVNA requires MRI showing Modic Type 1 or 2 changes (L3–S1)

For BVNA candidate documentation, include MRI evidence of Modic Type 1 or 2 endplate changes between L3 and S1; trials required these imaging findings for enrollment.

Attach MRI reports/images demonstrating Modic Type I or II changes at the targeted levels.
Correlate imaging findings with clinical presentation of vertebrogenic axial CLBP.

Procedure Frequency Limits

Frequency limits — general

Policy statementNo explicit frequency limits are stated in this policy section.

Implication for prior authorizationReviewers should reference guideline-recommended intervals and document medical necessity when frequency is uncertain.

Related guidanceASIPP and ASRA guideline recommendations on intervals are referenced elsewhere in the policy and may inform frequency decisions.

Medial branch RFA / medial branch neurotomy — frequency limits

Suggested maximum frequencyNo more than 2 procedures per region per year (suggested maximum).

Minimum interval guidanceTherapeutic interval suggested at least 6 months per region when benefit of ≥50% relief is obtained for 5–6 months (ASIPP).

Definitions of Ablative Techniques

Cooled Radiofrequency Ablation — definition

DefinitionThe application of continuous high frequency electrical current to ablate nerve tissue using water-cooled electrodes/probes.

Typical useUsed to create larger lesions for denervation of medial branch or lateral branch nerves treating facet or sacroiliac joint pain.

Evidence noteEvidence for CRFA is mixed; randomized trials and HTA reports cited elsewhere in the policy highlight limited high-quality long-term data.

Pulsed Radiofrequency Ablation — definition

DefinitionTechnique that delivers intermittent short bursts of energy, instead of continuous energy, using a probe temperature of 42° to 45° Celsius.

Reporting notePulsed RFA is listed among procedures considered unproven/not medically necessary in this policy.

Background

Ablative procedures are intended to reduce spinal pain by destroying or interrupting nociceptive nerve pathways. Modalities described in this policy include continuous thermal radiofrequency ablation (conventional RFA), cooled radiofrequency ablation using water‑cooled probes to create larger lesions, pulsed radiofrequency ablation delivering intermittent bursts of lower‑temperature energy, cryoablation (freezing techniques such as cryorhizotomy), endoscopic rhizotomy, chemical ablation, laser ablation, and intraosseous basivertebral nerve ablation (BVNA/Intracept). Evidence quality varies substantially across modalities; several techniques are identified as unproven and not medically necessary due to limited or low‑quality trial data.

Services Not Covered

Procedures considered not covered / not medically necessary in this policy include: pulsed radiofrequency ablation (facet nerves, sacral root, dorsal root ganglion), endoscopic radiofrequency ablation/endoscopic rhizotomy, cryoablation (all forms listed), cooled radiofrequency ablation, chemical ablation, laser ablation, sacroiliac joint ablation, and intraosseous basivertebral nerve ablation (Intracept) when performed outside the strict selection and evidence contexts. For BVNA, the policy notes that although some trials report benefit for patients with Modic changes, limitations in trial design and follow‑up may render the procedure not medically necessary for patients who do not meet those specific selection criteria.

Policy Summary

PayerUnitedHealthcare

PolicyAblative Treatment for Spinal Pain

Policy CodePolicy CS001.S

Change TypeMaterial clarification + administrative edits

Effective DateApr 1, 2025

Next Review Date

Key ActionDocument prior conservative management (≥6 months when applicable) and diagnostic block responses and obtain prior authorization using the listed procedure codes where required.

SourceLink

On This Page

ODI ≥10-point or pain ≥50% responder thresholds used in studies

Endpoints and imaging requirements derive from clinical trials and systematic reviews.

Minimum conservative treatment duration for BVNA: Document attempts at and inadequate response to conservative (non-surgical) therapies for at least 6 months prior to consideration of basivertebral nerve ablation>=6 months

Khalil et al. INTRACEPT trial and other BVNA trial protocols enrolled patients with ≥6 months of symptoms refractory to conservative care.

inv-34: Use of diagnostic blocks to confirm pain source (single or dual depending on procedure) is emphasized in guideline recommendations.

Use of diagnostic blocks to confirm pain source (single or dual depending on procedure) is emphasized in guideline recommendations:

Medial branch diagnostic blocks for facet procedures: Only perform radiofrequency denervation after a positive response to a diagnostic medial branch block; document magnitude of pain relief

NICE recommends positive diagnostic medial branch block prior to denervation.

Dual diagnostic blocks for sacroiliac procedures: For sacroiliac joint procedures, consider dual diagnostic blocks (both diagnostic and prognostic lateral branch blocks) to confirm SIJ as pain source before cooled RFA

NASS suggests CRFA for SIJ pain diagnosed with dual diagnostic blocks; trial protocols for SIJ studies used diagnostic/prognostic blocks.

Obtain prior authorization to confirm that conservative care and prognostic/diagnostic blocks have been attempted and documented when required by the benefit. PA reviewers should verify documentation of prior therapies (physical therapy, medications, injections, etc.) and results of diagnostic or prognostic medial branch or sacroiliac joint blocks where the indication or guideline requires them.

Document trials of conservative management (e.g., structured PT, pharmacotherapy, activity modification) prior to RFA when clinically appropriate
Include results and dates of diagnostic and/or prognostic blocks (percent pain relief, technique, and timing)
For repeat procedures, document prior benefit (commonly ≥50% pain relief) and timing between procedures

Prior Authorization

Verify benefits and prior authorization

Before scheduling or performing procedures, verify member benefits and obtain any required prior authorization. Coverage determinations are subject to federal, state, and contractual benefit terms which may impose additional requirements or exceptions.

Confirm member-specific medical necessity criteria and PA requirements per the benefit plan
If state or contract requirements differ from this policy, follow the federal/state/contractual requirements
Use third-party tools (e.g., InterQual) as authorized by UnitedHealthcare when applicable

Denial Risk

Denial risk for unproven ablative procedures

Procedures identified as unproven (e.g., pulsed RFA for facet nerves, endoscopic RFA/rhizotomy, cryoablation, cooled RFA variants, chemical or laser ablation, and intraosseous BVN ablation where not supported by coverage) carry a high risk of denial as not medically necessary. Ensure documentation supports any request and aligns with coverage criteria.

Examples of techniques at high denial risk: pulsed RFA of facet nerves, endoscopic RFA, cryoablation, cooled RFA, chemical or laser ablation
Intraosseous BVN procedures (Intracept) are noted as unproven in parts of this policy — verify specific plan coverage and evidence basis before authorization

Prior Authorization

Diagnostic block requirement (NICE)

Follow guideline-based diagnostic block requirements: a positive response to a diagnostic medial branch block is required before offering radiofrequency denervation per NICE; ASRA and ASIPP also recommend using medial branch blocks as prognostic screening prior to lumbar facet RFA.

NICE: Only perform radiofrequency denervation after a positive diagnostic medial branch block
ASRA: Medial branch blocks are the prognostic screening test of choice before lumbar facet RFA
Document percentage pain relief and timing of blocks relative to the proposed RFA

Note

Contract and regulatory compliance

Ensure all requests comply with applicable federal, state, and contractual requirements. Where contract or regulatory requirements conflict with this policy, the federal/state/contractual terms govern coverage decisions.

Review and apply member-specific plan language and state mandates
Document any deviations necessitated by contractual or regulatory requirements in the authorization review

Documentation Required

Documentation supporting BVNA

When requesting intraosseous basivertebral nerve ablation (BVNA / Intracept), include imaging evidence of Modic Type 1 or 2 endplate changes and validated baseline and follow-up outcome measures (e.g., ODI, VAS) from clinical trials to support medical necessity.

Provide imaging reports documenting Modic Type I or II changes between L3 and S1 where applicable
Include validated outcome measures (ODI, VAS) and prior conservative care documentation
If prior trials (e.g., SMART, INTRACEPT) are cited, supply patient-specific data that align with trial inclusion criteria

Documentation Required

Documentation and benefit verification

PA reviewers must document benefit verification steps and reference federal/state/contractual plan terms when rendering determinations. Maintain copies of operative reports, imaging, diagnostic block results, and conservative therapy records in the authorization record.

Include operative/procedure notes, imaging, diagnostic/prognostic block documentation, and conservative management records in the PA submission
Reference plan-specific benefit language, state mandates, and any third-party criteria used (e.g., InterQual) in the authorization rationale

Documentation Required

Conservative care and diagnostic block documentation

Document conservative care trials and diagnostic block sequencing clearly: conservative management should precede RFA when indicated, diagnostic/prognostic blocks should be performed and their results recorded, and sequencing (e.g., wait intervals between regions or repeat procedures) should follow guideline recommendations.

Record details of conservative therapies (type, duration, response) prior to RFA
Document diagnostic/prognostic block technique, date, and percent relief; for multiple regions, observe recommended intervals (e.g., treat different regions no sooner than 1–2 weeks apart)
For repeat RFA, document prior benefit (commonly ≥50% relief for specified duration) and adhere to recommended frequency limits (generally no more than twice per year per region)

Prior Authorization

Conservative management and diagnostic block sequencing

Favor non-surgical management prior to RFA when clinically appropriate and ensure diagnostic block sequencing is consistent with guideline recommendations. If multiple regions are treated, document rationale for simultaneous versus staged procedures and adhere to recommended inter-procedure intervals.

Prefer a trial of non-surgical management (PT, medications, injections) before RFA unless contraindicated
When using diagnostic blocks, perform prognostic testing (medial branch or SIJ blocks) prior to RFA and document timing/response
If treating multiple regions, consider treating all regions at the same time when safe; otherwise, space procedures per guideline intervals (≥1–2 weeks between regions)

Documentation Required

Document imaging guidance for RFA, CRFA, and BVNA procedures

Imaging guidance expectations are implied for RFA, cooled RFA, and basivertebral ablation—ensure procedural documentation includes the imaging technique used for targeting (e.g., fluoroscopy or CT) as trials and coding guidance reference image‑guided techniques.

Document the imaging modality and target localization steps in the operative report.
When applicable, support coding with documentation of image guidance to match listed image‑guided CPT codes.

Repeat procedure criteriaRepeat RFA recommended for recurrence in patients who had a good outcome (≥50% pain relief at 3 months) (ASRA).

Coding noteWhen reported, pulsed RFA is noted to be billed with unlisted nervous system code (CPT 64999) per coding guidance in the policy.

Basivertebral nerve ablation (BVNA / Intracept) — definition

DefinitionPercutaneous intraosseous radiofrequency ablation targeting the basivertebral nerve for chronic vertebrogenic low back pain in patients with Modic Type 1 or 2 changes between L3 and S1.

Patient selectionTrials enrolled adults with refractory chronic low back pain and Modic Type 1 or 2 changes; documentation of imaging and validated outcomes (ODI, VAS/NRS) is emphasized.

Evidence summaryRandomized sham-controlled and pooled trials demonstrate clinically meaningful ODI and pain improvements in selected patients, but long-term and generalizability limitations exist.

Cooled radiofrequency ablation (CRFA) — definition

DefinitionA radiofrequency technique using cooled probes to create larger lesions for denervation of medial branch or lateral branch nerves treating facet or sacroiliac joint pain.

Clinical contextUsed in studies comparing CRFA to conventional RFA for facet or sacroiliac joint pain; evidence shows mixed results with some short-term benefits reported.

Evidence limitationMany studies are small, observational, or lack long-term comparative data; high-quality randomized trials are needed to validate findings.

Laser ablation (laser neurolysis) — definition

DefinitionAblative application of laser energy to denervate painful spinal structures.

Evidence statementThere is insufficient evidence to establish the safety and efficacy of laser ablation for treating spinal pain; existing reports are small case series.

Research needWell‑designed randomized controlled trials with larger samples and long-term follow-up are needed to determine impact on health outcomes.

Conventional (Thermal) Radiofrequency Ablation — definition removed

Policy changeDefinition of 'Conventional (Thermal) Radiofrequency Ablation' has been removed from this policy version (see revision history).

Revision dateChange documented in Policy History: 04/01/2025 (Definitions removed).

GuidanceRefer to earlier policy versions or clinical guidelines for details on conventional thermal RFA technique and terminology if needed.