Sacroiliac Joint Fusion and Stabilization
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Criteria and coverage guidance for minimally invasive and open sacroiliac (SI) joint fusion and stabilization procedures for plans administered by Cigna and reviewed by eviCore; applies to providers seeking medical necessity determinations and prior authorization.
No material clinical or coverage changes in this revision.
Coverage Criteria for SI Joint Fusion and Stabilization
Minimally Invasive SI Joint Fusion — Medical Necessity
Minimally invasive sacroiliac (SI) joint fusion and stabilization is considered medically necessary when ALL of the following criteria have been met:
From CMM-611.2
Open SI Joint Fusion — Medical Necessity
Open sacroiliac (SI) joint fusion is considered medically necessary when ALL of the following criteria have been met:
From CMM-611.3
Covered indications
Covered only when the General Guidelines and the specific device-type criteria are met; otherwise considered not medically necessary.
General requirements for surgical consideration
- Diagnostic confirmation: At least two separate diagnostic SI joint injections demonstrating >=75% symptom improvement due to single-injection false positive rates.>=75% improvement
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- Conservative care: Documentation of conservative therapy (NSAIDs, physician-supervised physical therapy, activity modification, and therapeutic injections) for at least six (6) months without adequate improvement.>=6 months
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chunks 20, 27
Not medically necessary
Explicit not medically necessary conditions
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The document includes sections titled “Non‑Indications” and “Not Medically Necessary” that identify situations where sacroiliac (SI) joint fusion and stabilization would not meet coverage criteria. These modules are present in the policy but the detailed text of many specific non‑indications appears elsewhere in the policy and is referenced by these headings.
Open sacroiliac (SI) joint fusion is explicitly listed as not medically necessary when performed without meeting the General Guidelines and the Open SI Joint Fusion indications. The policy further states open SI fusion is not medically necessary for mechanical low back pain, sacroiliac joint syndrome, degenerative sacroiliac joint, or radicular pain syndromes.
The reference‑only portions of the provided excerpt do not contain additional explicit coverage criteria, exclusions, or not medically necessary statements beyond the headings and bibliographic citations present in those chunks.
A Not Medically Necessary module (CMM‑611.4) is present in the policy extract but the excerpted pages do not include the complete list of NMN conditions. The presence of the module indicates the policy contains explicit NMN determinations elsewhere in the full document.
Minimally invasive or percutaneous SI joint fusion and stabilization procedures using devices or implants that do not meet the policy’s device criteria are considered not medically necessary. Examples called out include implants that do not traverse and transfix the SI joint (for example, an allograft wedge placed between the sacrum and ilium or non‑metallic implants), procedures performed without intent to fuse (joint distraction), procedures when implant insertion is not possible, and bilateral SI fusion performed on the same date of service.
This placeholder area in the excerpt contains only bibliographic references and does not include additional coverage criteria or summaries in the provided pages.
Coding and Key Thresholds
| 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 Denial Triggers
Prior authorization required (see CMM-600.1)
Prior authorization is required; determinations are made case-by-case and providers should follow CMM-600.1 for timing and documentation requirements.
Codes listed do not guarantee coverage or prior authorization
Inclusion of CPT codes in the codes table does not imply that a code is managed or requires prior authorization; refer to the applicable health plan. Prior authorization of a code is not a guarantee of payment.
No prior authorization details in reference-only sections
This excerpt contains reference-only material where no specific prior authorization requirements are stated; these chunks are bibliographic and do not define authorization criteria.
Conservative therapy trials required before fusion
Patients must have undergone trials of conservative therapies before surgical consideration, including therapeutic SI joint injection, NSAIDs, medication optimization, activity modification, and physician‑supervised physical therapy.
- At least one therapeutic SI joint injection
- NSAIDs for at least 6 consecutive months
- Prescription medication optimization for at least 6 consecutive months
- Activity modification for at least 6 consecutive months
- Physician‑supervised active physical therapy for at least 6 consecutive months
Minimum 6 months of conservative care required prior to surgery
Conservative measures (NSAIDs, physical therapy, activity modification, and injections) are recommended and surgery may be considered only after failure of at least six (6) months of conservative care.
- Surgery considered only after persistent moderate to severe pain and failed ≥6 months conservative care
Provider action — no specific requirement in this excerpt
No provider action specified in this placeholder section of the excerpt.
Required documentation for medical necessity review
Document must include diagnostic SI joint injection results (two separate injections with ≥75% pain reduction), appropriate imaging (plain x-rays and/or CT or MRI to exclude destructive lesions, fractures, and alternative pain sources), records of conservative therapy trials and duration, and documentation of nicotine-free status when applicable.
- Two separate diagnostic SI joint injections each demonstrating ≥75% reduction in reported pain
- Plain x-rays (including ipsilateral hip) and/or CT or MRI of SIJ and lumbar spine as indicated
- Records of NSAID use, medication optimization, activity modification, and physician‑supervised PT for required durations
- Nicotine-free status: never‑smoker or ≥6 weeks abstinence validated by cotinine testing
Clinical documentation required: symptoms, exam, imaging, injections
Providers should document supportive subjective symptoms and physical exam findings, imaging to exclude other sources of pain, and positive diagnostic injection results (recommended two injections with ≥75% improvement).
- Symptoms localizing to Fortin's point and non‑radiating pain caudal to L5
- Physical exam: localized sacral sulcus/posterior SIJ tenderness and reproduction on ≥3 provocative tests
- Positive diagnostic injections: two separate injections with ≥75% symptom improvement
- Assessment/management of psychosocial disorders and smoking status
Reference-only content — no additional provider actions
This placeholder references-only chunk contains bibliographic references and does not add new provider action requirements.
Triggers for claim denial
Lack of required diagnostic confirmation (two positive SI joint injections with ≥75% pain reduction), absence of required imaging, failure to document conservative care duration, or failure to verify nicotine‑free status may lead to denial.
- Missing two diagnostic injections with ≥75% pain reduction
- No plain x-rays or cross-sectional imaging to exclude other pathology
- Insufficient documentation of ≥6 months conservative therapy
- No objective cotinine testing when nicotine abstinence claimed
Denial risk for procedures not meeting guideline criteria
Procedures performed without meeting the General Guidelines and the specified Minimally Invasive or Open SI Joint Fusion criteria are considered not medically necessary and are subject to denial.
Explicit non-covered scenarios that will be determined NMN
Specific scenarios that trigger not medically necessary determinations include procedures when implants cannot be inserted, bilateral SI fusion on the same date, use of implants that do not traverse and transfix the SI joint, procedures performed without intent to fuse (joint distraction), and open fusion performed for mechanical low back pain, sacroiliac joint syndrome, degenerative SI joint, or radicular pain.
- Any condition preventing implant insertion
- Bilateral SI joint fusion/stabilization on same date of service
- Implants that do not traverse/transfix the SI joint (e.g., allograft wedge, non‑metallic implants)
- Procedures intended for joint distraction rather than fusion
- Open SI fusion for mechanical low back pain, sacroiliac joint syndrome, degenerative SI joint, or radicular pain
No authorization/denial rules in reference-only bibliography
The reference-only bibliography sections do not contain authorization or denial criteria and should not be used as source of prior authorization rules.
Background and Scope
Minimally invasive and open sacroiliac joint fusion are surgical options intended to treat lumbopelvic pain originating from the SI joint. Diagnostic SI joint injections are used to confirm the SI joint as the pain generator and imaging is required to exclude other pathology. Open SI joint fusion is reserved for specific indications such as trauma, infection adjuncts, sacral tumor management, multi‑segmental long‑fusion constructs, or failed prior percutaneous fusion; minimally invasive approaches are intended to use implants that traverse and transfix the joint with the intent to fuse.
Definitions and Diagnostic Criteria
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