CurrentCareSourcePolicy N/A

Sacroiliac Joint Procedures — SIJ injections and radiofrequency ablation (RFA)

Defines medical necessity, limitations, and requirements for diagnostic and therapeutic sacroiliac joint (SIJ) injections and SIJ radiofrequency ablation (RFA) for Arkansas PASSE members; applies to providers requesting coverage and prior authorization.

Policy Summary

PayerCareSource

PolicySacroiliac Joint Procedures — SIJ injections and radiofrequency ablation (RFA)

Policy CodePolicy N/A

Change TypeMaterial clinical change — criteria added/clarified

Effective DateMar 1, 2026

Next Review DateN/A

Key ActionObtain prior authorization and submit documentation showing ≥6 weeks of conservative therapy, pain ≥6/10, ≥3 positive SIJ provocation tests, and response to diagnostic injection (≥75% relief when applicable).

SourceLink

POLICY UPDATE CHANGES

Added pain level criterion requiring at least 6/10 pain and increased number of positive provocation tests for diagnostic injections.

>=3positive SIJ provocation tests

>=6wksmin active conservative therapy

75%pain relief threshold

4max injections/site/12m

1max RFA/side/12m

Coverage Criteria for SIJ Injections and RFA

inv-01: Diagnostic injections

Covered when ALL of the following are met:

Diagnostic SIJ injection criteria: 1) Somatic or nonradicular low back and/or lower extremity pain for at least 3 months; 2) Severe pain (>=6/10) and tenderness in the SIJ region causing functional disability; 3) Positive response to at least 3 SIJ pain provocation tests (eg, distraction, compression, thigh thrust, Gaenslen's, Patrick/FABER, sacral thrust); 4) Failure of conservative therapy documented by: (a) >=6 weeks of active conservative therapy within the past 6 months OR documented inability to complete active therapy for physical reasons, AND (b) >=6 weeks of inactive conservative therapy within the past 6 months; 5) If a second diagnostic injection is requested, at least 1 week has passed since the initial injection.

Up to 2 diagnostic injections considered medically necessary

inv-02: Therapeutic injections

Covered when ALL of the following are met:

Therapeutic SIJ injection criteria: 1) Most recent SIJ injection produced >=75% pain relief and functional improvement; 2) Member has return of severe pain or deterioration in function; 3) Injection is used in conjunction with conservative therapy (active and inactive as defined in policy); 4) Injection frequency no greater than every 2 months; 5) No more than 4 injections total (diagnostic + therapeutic) at the same site in the last 12 months.

Policy Summary

PayerCareSource

PolicySacroiliac Joint Procedures — SIJ injections and radiofrequency ablation (RFA)

Policy CodePolicy N/A

Change TypeMaterial clinical change — criteria added/clarified

Effective DateMar 1, 2026

Next Review DateN/A

SourceLink

On This Page

Trek Health ingests and normalizes Transparency in Coverage data and payer policy updates to give provider organizations a clear view of how commercial reimbursement behaves across markets, payers, and services. Our platform transforms raw payer disclosures into structured intelligence that supports contract evaluation, payer negotiations, and service line strategy. By combining market benchmarks with ongoing policy visibility, Trek helps teams identify variability, risk, and opportunity in commercial reimbursement. The result is faster insight, stronger negotiating positions, and more informed financial decisions.

frequency limits and total count

inv-03: Initial radiofrequency ablation (RFA)

Covered when ALL of the following have been met in the last 6 months:

Initial SIJ RFA: a) Failed conservative therapy as defined by the policy (documentation of >=6 weeks active conservative therapy within past 6 months or documented inability to complete, and >=6 weeks of inactive conservative therapy within past 6 months); b) One diagnostic injection per joint performed with reported >=75% reduction in pain after injection.6 months window

Image guidance/fluoroscopy required per policy

inv-04: Repeat radiofrequency ablation (RFA)

Covered when ANY of the following conditions are met (repeat-specific rules):

Repeat SIJ RFA rules: 1) If there has been >=12 months of pain reduction from the initial RFA within the last 36 months, conservative therapy and diagnostic injections are not required for repeat RFA; 2) If there has not been a repeat RFA in the last 36 months, a diagnostic injection is required prior to repeat RFA; 3) Maximum of 1 RFA per side per 12 months.time-based

The policy considers the use of cooled radiofrequency ablation (cooled RFA) for sacroiliac joint (SIJ)-mediated low back pain to be not medically necessary due to insufficient evidence demonstrating efficacy in the peer-reviewed literature.

The use of SIJ injections for pain resulting from Herpes Zoster is considered not medically necessary because available evidence is insufficient to demonstrate efficacy.

The policy states that monitored anesthesia and conscious sedation for SIJ procedures are not medically necessary and may be denied when billed for these interventions.

Cooled radiofrequency ablation specifically for SIJ pain is listed as not medically necessary based on insufficient evidence supporting its effectiveness.

Coding and Billing Rules

Billing conflicts / Not billable togetherCPT

64451	Injection, anesthetic agent; other peripheral nerve or branch (documented in policy as conflicting with 27096)
27096	Injection procedure for sacroiliac joint (listed in policy as conflicting with 64451)

Pain reduction threshold

Pain reduction required>= 75% reduction in pain after diagnostic SIJ injection

PurposeDemonstrated therapeutic effect from diagnostic injection used to select candidates for initial RFA

Timing windowReported within the last 6 months prior to initial RFA request

Provider Actions, Documentation, and Prior Authorization

Prior Authorization

Prior Authorization Required

Prior authorization required to establish medical necessity per criteria.

Step Therapy

Conservative-first Requirement

Conservative therapies (active and inactive) and diagnostic injections are required before therapeutic injections or radiofrequency ablation except in limited exceptions. Medical record must document failure of conservative therapy: 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 at least 6 weeks of inactive conservative therapy within the past 6 months. For initial RFA, one diagnostic injection per joint with ≥75% pain reduction is required. Repeat RFA may waive conservative therapy and diagnostic injections if prior RFA provided ≥12 months of pain relief within the last 36 months.

Documentation Required

Clinical Documentation Requirements

Clinical documentation must include duration of somatic or nonradicular low back and/or lower extremity pain (≥3 months), pain severity (at least 6/10), tenderness in the SIJ region causing functional disability, results of at least 3 positive SIJ provocation tests (eg, distraction, compression, thigh thrust, Gaenslen's, Patrick's/FABER, sacral thrust), and details of conservative therapy (types, dates, duration, and response). For diagnostic injections, document pain relief percentage and timing; for implanted spinal cord stimulators or pumps, submit device interrogation report with prior authorization requests.

Billing Rule

Conflicting Codes — Billing Restriction

Billing both codes 64451 and 27096 on the same date for the same side is not allowed; only one code will be reimbursed and the other may be denied or adjusted.

Affected codes: 64451, 27096

Definitions and Key Terms

Conservative Therapy

DefinitionA multimodal plan of care including both active and inactive conservative therapies

Active componentsPhysical therapy, occupational therapy, physician‑supervised home exercise program (HEP), and/or chiropractic care

Inactive componentsRest, ice/heat, medical devices, TENS, and pharmacotherapy (prescription or OTC)

HEP (Home Exercise Program)

DefinitionA 6‑week home exercise program requiring an exercise prescription/plan and documented follow‑up after completion, or documentation of inability to complete for stated physical reasons

Provider roleProgram must be physician‑supervised or otherwise documented in the medical record

NoncompliancePatient inconvenience or unexplained noncompliance does not qualify as inability to complete

Radiofrequency Ablation (RFA)

DefinitionMinimally invasive procedure that percutaneously introduces an electrode under fluoroscopic guidance to thermocoagulate target nerves (medial branches) for SIJ pain

ImagingPerformed under fluoroscopic guidance; image guidance is included and may not be billed separately

Use caseConsidered medically necessary for initial RFA when failed conservative therapy and diagnostic injection with >=75% pain reduction have been met within 6 months

Sacroiliac Joint (SIJ) Injections

DefinitionCorticosteroid and local anesthetic injections into the sacroiliac joint to diagnose or temporarily treat SIJ‑mediated pain not responsive to conservative therapies

Diagnostic vs TherapeuticDiagnostic injections help identify SIJ as pain source (up to 2 diagnostic injections allowed); therapeutic injections are for symptom relief when prior injection produced >=75% pain relief

Image guidanceImage guidance and/or contrast injection is included in the procedure and may not be billed separately

Conservative Treatment Requirements Prior to Intervention

inv-22: Required prior to diagnostic injection and initial RFA

Required prior to diagnostic injection and initial RFA:

Conservative therapy requirement: Active conservative therapy: documentation of at least 6 weeks of active therapies (eg, PT/OT, supervised 6‑week HEP) within the past 6 months OR documented inability to complete active therapy for physical reasons; AND Inactive conservative therapy: documentation of at least 6 weeks of inactive therapies (eg, rest, ice/heat, TENS, pharmacotherapy) within the past 6 months.Active: >=6 weeks within past 6 months; Inactive: >=6 weeks within past 6 months

Required prior to diagnostic injections and initial RFA except as noted for repeat RFA

Frequency and Quantity Limits

SIJ injections — Total injections per 12 months

LimitNo more than 4 injections total (diagnostic + therapeutic) at the same site in the last 12 months

Applies toCount includes both diagnostic and therapeutic SIJ injections at the same anatomical site

DocumentationPrior authorization and medical record must support number and dates of prior injections

Therapeutic SIJ injection — Frequency

Frequency limitTherapeutic SIJ injection may be repeated no more frequently than every 2 months (>=2 months between injections)

ConditionTherapeutic injections must be used in conjunction with conservative therapy

DocumentationMedical record must document most recent injection produced >=75% pain relief and functional improvement prior to repeat therapeutic injection

SIJ RFA — Procedure frequency

LimitMaximum of 1 RFA procedure per side per 12 months

Repeat rulesIf RFA produced >=12 months of pain reduction within the last 36 months, conservative therapy and diagnostic injections are not required for repeat RFA

When diagnostic injection requiredIf no RFA in the last 36 months, a diagnostic injection is required before repeat RFA

Imaging and Procedural Guidance Requirements

Billing Rule

Fluoroscopy/image guidance included (do not bill separately)

Image guidance/fluoroscopy is included in SIJ injections and RFA and should not be billed separately; fluoroscopic guidance is required for RFA.

Image guidance and/or injection of contrast is included in sacroiliac injection procedures and may not be billed separately.
RFA is percutaneous and performed under fluoroscopic guidance.

Clinical Background

Sacroiliac joint dysfunction is a recognized contributor to persistent low back pain and may account for approximately 10–30% of cases. First-line management emphasizes a conservative, multimodal approach that includes both active therapies (for example, physical therapy, occupational therapy, and a supervised or documented 6‑week home exercise program) and inactive measures (such as rest, ice/heat, TENS, and pharmacotherapy). Documentation of start dates, duration, and follow-up for conservative treatments is required prior to diagnostic SIJ injection and initial radiofrequency ablation. SIJ injections are primarily diagnostic with limited short-term therapeutic benefit; RFA evidence is inconsistent and selection of patients for RFA requires demonstration of response to diagnostic injection and adequate conservative therapy.

Services Not Covered

Not covered: cooled radiofrequency ablation for SIJ-mediated low back pain; SIJ injections for pain due to Herpes Zoster; and monitored anesthesia and conscious sedation for SIJ procedures are considered not medically necessary due to insufficient evidence or lack of medical necessity and therefore are not covered under this policy.