DraftBlue Cross Blue Shield - Rhode IslandPolicy N/A

Image-Guided Minimally Invasive Spinal Decompression for Spinal Stenosis

This draft policy governs coverage determinations for percutaneous image-guided minimally invasive lumbar decompression (mild®) targeting central spinal stenosis, specifying distinctions for Medicare Advantage and Commercial products and addressing HCPCS code G0276 for Medicare and commercial contexts.

Policy Summary

PayerBlue Cross Blue Shield - Rhode Island

PolicyImage-Guided Minimally Invasive Spinal Decompression for Spinal Stenosis

Policy CodePolicy N/A

Change TypeNo material change

Effective DateJan 11, 2025

Next Review DateAug 20, 2025

Key ActionWhen treating a Medicare Advantage member in a CMS-approved CED clinical trial, bill with the appropriate Q0 or Q1 modifier.

SourceLink

POLICY UPDATE CHANGES

No material clinical or coverage changes in this revision.

1HCPCS code addressed (G0276)

CMS CEDMedicare CED coverage

2Randomized trials cited

1Procedure limited to central stenosis

15+

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Coverage Criteria

Medicare Advantage Plans coverage

Covered only as part of a CMS-approved Coverage with Evidence Development (CED) clinical trial when performed as a blinded PILD or placebo-control:

Medicare CED coverage: Procedure must be performed as a blinded PILD or placebo-control in an approved CMS CED clinical trialperformed as part of CMS-approved CED trial

HCPCS G0276 may be covered; claims must include appropriate Q0/Q1 modifiers

Commercial Products stance

Commercial coverage determination based on evidence:

Commercial product determination for blinded PILD: Blinded procedure for lumbar stenosis (PILD) or placebo-control is considered not medically necessary for Commercial Productsinsufficient evidence

G0276 listed as not medically necessary for Commercial Products

Evidence summary and general coverage implication

Available clinical evidence and conclusion:

Evidence adequacy: Randomized trials and cohort studies exist but have limitations (lack of blinding, risk of bias, limited follow-up, and heterogeneous comparators); the evidence is insufficient to determine the net health benefit of MILD compared with placebo, open decompression, or conservative treatmentinsufficient evidence

Policy concludes evidence insufficient to establish efficacy for commercial use; well-designed trials with relevant control groups are needed

The percutaneous image-guided minimally invasive lumbar decompression (mild®) procedure is intended to treat central lumbar spinal stenosis only. The procedure uses a fluoroscopically guided cannula and single‑use instruments to resect hypertrophied ligamentum flavum and small laminar bone fragments to decompress the central canal. The device and technique are not intended for disc procedures and are contraindicated for use near lateral neural elements, as the instruments remain dorsal to the dura and cannot address nerve root compression or disc herniation.

If services are determined to be not medically necessary or otherwise non‑covered under the member’s benefit plan, those services may be excluded from payment. Providers may not charge the member for non‑covered or not medically necessary services unless the member was informed and provided written agreement in advance to accept financial responsibility.

For Commercial Products, the blinded percutaneous image‑guided lumbar decompression procedure performed as part of a CMS Coverage with Evidence Development (CED) clinical trial (HCPCS G0276) is considered not medically necessary and will be denied for commercial members.

Services determined to be not medically necessary are not covered for payment. Providers should verify member benefits and obtain any required authorizations per the subscriber agreement; denial of payment may occur for not medically necessary services.

Coding

HCPCS code addressedHCPCS

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

Required claim modifiers for CMS-approved trialsModifier

Q0	Investigational clinical service provided in a clinical research study that is in an approved research study (Medicare claims filed without the Q0 modifier will deny as not medically necessary)
Q1	Routine clinical service provided in a clinical research study that is in an approved clinical research study

Referenced coverage guidancemixed

CMS NCD 150.13

Percutaneous Image-guided Lumbar Decompression for Lumbar Spinal Stenosis (national coverage determination reference)

Provider Actions & Billing

Note

Medical Criteria / Prior Authorization

Not applicable

Note

Benefit Verification

Benefits may vary by contract. Refer to the member's Benefit Booklet, Evidence of Coverage, or Subscriber Agreement for applicable benefits, coverage limitations, and whether services are considered not medically necessary or non-covered.

Prior Authorization

Prior Authorization & Benefits

Prior authorization: Not applicable for this policy. Individual plan requirements may differ; verify prior authorization requirements through the member's benefit documents or by contacting the provider call center.

Background

Lumbar spinal stenosis (LSS) is a narrowing of the central spinal canal that compresses the spinal cord and nerve roots, commonly producing neurogenic claudication—leg pain, heaviness, or weakness brought on by standing or walking and relieved by sitting or spinal flexion. Conventional posterior decompressive surgeries (eg, laminectomy, laminotomy) are established treatments; the mild® procedure is an ultra‑minimally invasive, percutaneous, fluoroscopically guided decompression that targets hypertrophied ligamentum flavum to enlarge the central canal while avoiding open surgical exposure. Benefit and eligibility are determined by the member’s subscriber agreement, and this policy does not guarantee payment.

Definitions

inv-21: IG-MILD (mild®) — procedure and tools

Procedure descriptionPercutaneous image-guided minimally invasive decompression performed under fluoroscopic guidance using a specialized cannula and single-use tools (portal cannula, surgical guide, bone rongeur, tissue sculptor, trocar) to resect hypertrophied ligamentum flavum and small laminar bone fragments for central lumbar spinal canal decompression.

Imaging guidanceEntire procedure performed under fluoroscopy with contrast medium injected into the epidural space to aid visualization of decompression.

InstrumentsSpecialized mild® tool kit: 6-gauge cannula with back plate plus single-use instruments for tissue and bone sculpting (portal cannula, surgical guide, bone rongeur, tissue sculptor, trocar).

Approach and scopePosterior percutaneous approach; procedure repeated contralaterally as needed for bilateral central canal decompression.

VisualizationNo endoscopic or microscopic visualization; decompression achieved using fluoroscopic imaging and contrast rather than direct visualization.

Policy Summary

PayerBlue Cross Blue Shield - Rhode Island

PolicyImage-Guided Minimally Invasive Spinal Decompression for Spinal Stenosis

Policy CodePolicy N/A

Change TypeNo material change

Effective DateJan 11, 2025

Next Review DateAug 20, 2025

Key ActionWhen treating a Medicare Advantage member in a CMS-approved CED clinical trial, bill with the appropriate Q0 or Q1 modifier.

SourceLink

On This Page

Billing Rule

Billing/Coding for CMS-Approved Clinical Studies (Medicare Advantage)

For Medicare Advantage members treated within a CMS-approved Coverage with Evidence Development (CED) clinical study, bill G0276 when appropriate and include the correct modifier: Q0 for investigational clinical service provided in an approved research study or Q1 for routine clinical service provided in an approved research study. Follow CMS billing rules for Medicare Advantage claims.

HCPCS G0276 — Blinded procedure for lumbar stenosis, percutaneous image-guided lumbar decompression (PILD) or placebo-control (Medicare CED only)
Use Modifier Q0 for investigational clinical service
Use Modifier Q1 for routine clinical service

Denial Risk

Commercial Products — Not Medically Necessary

For Commercial Products, HCPCS code G0276 (blinded PILD/placebo in a CED trial) is considered not medically necessary and is non-covered. Claims for services determined to be not medically necessary or non-covered may be denied and the provider may not bill the member unless the member was informed and provided written agreement to pay in advance.

Commercial: G0276 — Not medically necessary / Non-covered

Documentation Required

Provider Actions

Provider actions: Benefits and eligibility are determined by the member's subscriber agreement, member certificate, and/or employer agreement. For member-specific benefits or prior authorization assistance, contact the BCBSRI provider call center. Do not bill members for services determined to be not medically necessary or non-covered unless prior written consent was obtained per the provider participation agreement.

inv-22: Device intent/limitations

Intended targetCentral lumbar spinal canal stenosis due to hypertrophied ligamentum flavum (central stenosis only).

Not intended for disc pathologyDevice and procedure are not intended for disc procedures or treatment of disc herniation.

Not for lateral neural elementsInstruments are contraindicated for use near lateral neural elements and are not intended to address nerve root compression.

Anatomic planeThe device remains dorsal to the dura and is used for tissue resection at the perilaminar/interlaminar space and ventral aspect of the lamina.

inv-23: minimally invasive lumbar decompression — definition

DefinitionMinimally invasive lumbar decompression (mild®/IG-MILD) is a percutaneous, fluoroscopically guided posterior decompressive procedure using the mild® instrument set to remove hypertrophied ligamentum flavum and small laminar bone fragments to enlarge the central spinal canal.

Technique specificsProcedure uses a 6-gauge cannula clamped with a back plate and single-use sculpting tools; contrast is added throughout to visualize decompression under fluoroscopy.

Indication scopeDesigned for treatment of central lumbar spinal stenosis only; not capable of addressing lateral foraminal stenosis, nerve root compression, or disc herniation.

Comparison to conventional surgeryProposed as an ultra–minimally invasive alternative to conventional posterior decompressive surgeries, without endoscopic or microscopic visualization.