Sacroiliac Joint Fusion and Stabilization
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Coverage policy governing medical necessity, indications, and non-indications for minimally invasive and open sacroiliac (SI) joint fusion and stabilization for members covered under Cigna benefit plans administered by eviCore. Affects providers seeking coverage or prior authorization for SI joint fusion procedures.
No material clinical or coverage changes in this revision.
Coverage Criteria for Sacroiliac Joint Fusion
Minimally Invasive SI Joint Fusion and Stabilization — Covered when ALL are met
Minimally invasive sacroiliac joint fusion and stabilization is considered medically necessary when ALL of the following criteria have been met:
A positive response is defined as ≥75% reduction in reported pain for the duration of the local anesthetic. See CMM-203 for diagnostic injection details.
Plain pelvic X-rays should include the ipsilateral hip; cross-sectional imaging of the lumbar spine as indicated.
Chiropractic adjustments may be additional but are not a substitute for physical therapy.
Open SI Joint Fusion — Covered when ALL are met
Open sacroiliac joint fusion is considered medically necessary when ALL of the following criteria have been met:
Minimally invasive or percutaneous sacroiliac (SI) joint fusion and stabilization using titanium triangular implants is considered not medically necessary when the procedure does not meet the policy's General Guidelines and the Minimally Invasive SI Joint Fusion and Stabilization indication criteria. The policy explicitly lists that such procedures are not medically necessary when they would prevent implant insertion, when bilateral SI joint fusion and stabilization procedures are performed on the same date of service, when implants used do not traverse and transfix the SI joint (for example, allograft wedge or non-metallic implants), or when the procedure is performed without the intention to fuse the joint (i.e., joint distraction).
Open sacroiliac (SI) joint fusion is considered not medically necessary when the procedure does not meet the policy's General Guidelines and the Open SI Joint Fusion indication criteria. The policy also specifies that open SI joint fusion is not medically necessary for the following conditions: mechanical low back pain, sacroiliac joint syndrome, degenerative sacroiliac joint, or radicular pain syndromes.
The reference section and supporting citations included in the document do not state any additional explicit coverage exclusions beyond those listed in the policy non-indications sections; references are provided for clinical background and evidence but do not themselves impose extra exclusions.
Procedures that fail to meet the specified General Guidelines and the applicable indication criteria for either minimally invasive/percutaneous or open SI joint fusion are considered not medically necessary and may be subject to denial. This applies to both the minimally invasive indications (including device and diagnostic confirmation requirements) and the open fusion indications.
This portion of the document does not contain any additional explicit 'not medically necessary' statements beyond the non-indications and not medically necessary language already cited in the policy sections.
Procedure Codes and Key Numeric Criteria
| 27278 | Arthrodesis, sacroiliac joint, percutaneous, with image guidance, including placement of intra-articular implant(s) (e.g., bone allograft[s], synthetic device[s]), without placement of transfixation device. |
| 27279 | Arthrodesis, sacroiliac joint, percutaneous or minimally invasive (indirect visualization), with image guidance, includes obtaining bone graft when performed, and placement of transfixation device. |
| 27280 | Arthrodesis, sacroiliac joint, open, includes obtaining bone graft, including instrumentation, when performed. |
Prior Authorization, Documentation, and Provider Requirements
Prior authorization follows CMM-600.1; referenced CPT codes
Prior authorization and any timing/documentation requirements follow CMM-600.1. The policy lists CPT codes 27278, 27279, and 27280 as the procedure codes referenced and these may be subject to prior authorization per the applicable health plan.
No explicit prior authorization statement in these pages
This section of the document does not provide an explicit prior authorization statement for these procedures; see CMM-600.1 for plan-specific prior authorization requirements.
- No explicit prior authorization requirement is stated on the referenced pages.
Conservative therapy: ≥1 therapeutic SI joint injection and ≥6 months non-invasive care
A trial of conservative therapy is required unless contraindicated: at least one therapeutic intra-articular SI joint injection plus all listed non-invasive treatments for a minimum consecutive six months.
- Require ≥1 therapeutic intra-articular SI joint injection (see CMM-203 for injection details).
- Require ≥6 consecutive months of non-invasive treatments: NSAIDs, prescription medication optimization, activity modification, and physician-supervised/prescribed active physical therapy (including home exercise).
No additional step therapy requirements provided
No step therapy protocol beyond the conservative therapy elements described is provided in this portion of the document.
- The policy does not specify additional step therapy sequencing or prior authorization step requirements in these pages.
Required documentation to support medical necessity
Document medical necessity with diagnostic confirmation from two separate fluoroscopic- or CT-guided SI joint injections demonstrating ≥75% reduction in reported pain, plus supporting imaging, exam findings, conservative treatment attempts, and nicotine-free status.
- Two separate diagnostic fluoroscopic- or CT-guided SI joint injections with ≥75% pain reduction for the duration of the local anesthetic.
- Imaging to exclude alternative pathology (plain X-rays and/or CT or MRI) concordant with history and exam.
- Record objective physical exam findings, details of conservative therapy attempts (including therapeutic injection and ≥6 months of non-invasive care), and nicotine-free status (blood cotinine ≤10 ng/mL).
Attach imaging reports and include procedure codes with authorization requests
Include plain X-ray and/or cross-sectional imaging reports (CT or MRI) showing localized SI joint pathology concordant with the history and exam when requesting authorization; include the procedure codes being requested.
Device IFU (SI-BONE iFuse) referenced — include device documentation as applicable
The policy references device Instructions for Use (SI-BONE iFuse IFU); device-specific IFU and manufacturer claim documentation may be relevant when submitting device-related claims or supporting documentation.
- SI-BONE iFuse Instructions for Use are cited in the references and may inform device-specific documentation requirements.
Denial risk: minimally invasive SIJ fusion without meeting indications
Minimally invasive/percutaneous SI joint fusion using titanium triangular implants performed without meeting the General Guidelines and Minimally Invasive Indications is considered not medically necessary and may be denied.
- Procedures that do not meet diagnostic, imaging, conservative therapy, or other listed criteria are considered not medically necessary.
Denial risk: open SIJ fusion without meeting open-fusion criteria
Open sacroiliac joint fusion performed without meeting the General Guidelines and Open SI Joint Fusion Indications is considered not medically necessary and may be denied.
- Open fusion for mechanical low back pain, sacroiliac joint syndrome, degenerative SI joint, or radicular pain syndromes is specifically listed as not medically necessary.
No further authorization/denial instructions in these pages; refer to CMM-600.1
No additional authorization or denial procedural content is present on the cited pages; for authorization timing and plan-specific management refer to CMM-600.1 and the applicable health plan.
- These reference pages do not contain further authorization or denial instructions.
Background and Clinical Context
Sacroiliac joint–originating lumbopelvic pain can be challenging to diagnose definitively. The policy endorses a multimodal assessment that includes a focused history, targeted physical provocation testing, imaging to exclude alternative causes, and diagnostic confirmation with injections. Conservative care is standard first-line management, and surgery is reserved for persistent, function-limiting pain after appropriate non-operative treatment. The references and clinical background in the policy support the need for objective diagnostic confirmation and careful selection of surgical candidates due to procedure risks and variable outcomes.
Definitions and Device References
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