Image-Guided Minimally Invasive Decompression for Spinal Stenosis (REQUIRES PREAUTHORIZATION)
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Policy governing coverage and preauthorization for percutaneous image-guided minimally invasive decompression (mild® procedure) for central spinal stenosis, affecting providers and members under Blue Cross Blue Shield - Nebraska.
No material clinical or coverage changes in this revision.
Coverage Determination and Rationale
Overall coverage determination
Covered when ALL of the following are met:
Policy states investigational; no medical necessity criteria for coverage provided.
The devices and technique described for percutaneous image-guided minimally invasive decompression (mild®) are intended specifically for central lumbar spinal stenosis and are not intended for use near lateral neural elements. The procedure uses a 6-gauge cannula with single-use instruments to resect portions of the ligamentum flavum and small laminar bone under fluoroscopic guidance and epidurography; because of this design and approach, the devices and procedure are contraindicated for disc procedures and cannot address nerve root compression or disc herniation. Detailed procedural documentation should reflect use of fluoroscopic guidance, epidurography/contrast, levels treated, and the inability of the procedure to treat lateral or disc pathology.
This policy designates image-guided minimally invasive spinal decompression (mild®) as investigational. There are no clinical scenarios in this policy in which the procedure is described as medically necessary, and therefore claims for this procedure are subject to denial as investigational per the policy statement.
Procedure and Billing Codes
| 62330 | Decompression, percutaneous, with partial removal of the ligamentum flavum, including laminotomy for access, epidurography, and imaging guidance (ie, CT or fluoroscopy), bilateral; one interspace, lumbar |
| 62331 | Decompression, percutaneous, with partial removal of the ligamentum flavum, including laminotomy for access, epidurography, and imaging guidance (ie, CT or fluoroscopy), bilateral; additional interspace(s), lumbar (List separately in addition to code for primary procedure) |
| G0276 | Blinded procedure for lumbar stenosis, percutaneous image-guided lumbar decompression (pild) or placebo-control, performed in an approved coverage with evidence development (ced) clinical trial |
Prior Authorization, Documentation, and Billing Guidance
Preauthorization required
Preauthorization is required for image-guided minimally invasive decompression procedures (policy title states "REQUIRES PREAUTHORIZATION"). Submit a prior authorization request before scheduling the procedure. Relevant CPT/HCPCS codes listed in the policy include 62330, 62331, and G0276.
Step therapy not applicable
No step-therapy or conservative-therapy prerequisites are specified in this policy for image-guided minimally invasive decompression; there is no required prior conservative treatment sequence listed.
Procedure documentation expectations
Document fluoroscopic guidance, epidurography with contrast, indication for central lumbar spinal stenosis, inability to address nerve root compression or disc herniation, and the specific levels treated and laterality. Include procedural details that confirm use of a 6-gauge cannula, epidural contrast medium, and fluoroscopic imaging throughout the decompression.
- Use of fluoroscopic guidance for the entire procedure
- Epidurography with contrast added throughout the procedure
- Indication limited to central lumbar spinal stenosis (not for lateral neural elements or disc procedures)
- Levels treated and whether bilateral decompression was performed
- Description of devices/tools used (eg, 6-gauge cannula, single-use instruments)
Investigational procedure — denial risk
The policy designates image-guided minimally invasive spinal decompression as investigational; claims for this procedure are subject to denial as investigational.
- There are no scenarios in the policy in which the procedure is considered medically necessary.
Clinical Background
Lumbar spinal stenosis produces narrowing of the central spinal canal that can result in neurogenic claudication—leg pain, numbness, or weakness that typically worsens with standing or walking and is relieved by sitting or leaning forward. Degenerative contributors commonly include ligamentum flavum hypertrophy, disc bulging, and facet arthropathy. The mild® percutaneous image-guided decompression procedure uses a 6-gauge cannula and single-use instruments under fluoroscopic guidance with contrast to resect thickened ligamentum flavum and small pieces of lamina to decompress the central canal. Because the procedure is performed solely under fluoroscopic visualization and is designed to remove central canal soft tissue and small bone fragments, it is intended only for central stenosis and cannot address lateral nerve root compression or disc herniation.
Procedure Definition
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