RetiredUnitedHealthcarePolicy CS363LA.D

Interspinous Fusion Decompression Devices La Cs

State-specific UnitedHealthcare medical policy for Louisiana addressing coverage of interspinous fixation (fusion) devices and interspinous decompression/interlaminar stabilization devices, including definitions, evidence review, applicable CPT procedure codes, documentation requirements, and policy history through retirement.

Policy Summary

PayerUnitedHealthcare

PolicyInterspinous Fusion Decompression Devices La Cs

Policy CodePolicy CS363LA.D

Change TypeRetirement and revised documentation/definitions (Mar 1, 2026)

Effective DateMar 1, 2026

Next Review DateN/A

Key ActionEnsure medical records fully support medical necessity (history, exam, pertinent diagnostic tests) and are legible and available upon request.

SourceLink

POLICY UPDATE CHANGES

03/01/2026: Added detailed 'Medical Records Documentation Used for Reviews' language and updated several definitions, description of services, clinical evidence, and references.

04/01/2026: Policy retired due to Louisiana plan membership disenrollment on Apr. 1, 2026.

Added language clarifying that benefit coverage is determined by federal, state, or contractual requirements and that medical records may be required to assess coverage but do not guarantee it.

Updated definitions for Arthrodesis, Interlaminar Lumbar Instrumented Fusion (ILIF), Interlaminar Stabilization Device, and Neurogenic Claudication.

LAState scope

YesSingle-level fusion allowed (L1-S1)

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6NASS exclusion criteria listed

4Definitions updated

Coverage Summary

This UnitedHealthcare Louisiana policy (Policy Number CS363LA.D) takes a mixed coverage stance and is retired effective 2026-04-01 for Louisiana membership. It applies only to the state of Louisiana.

Interspinous fixation devices used as an adjunct to interbody fusion at a single lumbar level (L1–S1) may be considered medically necessary when performed according to FDA labeled indications and when specific clinical criteria are met (for example, discogenic back pain with radiographic confirmation and ≤ Grade I spondylolisthesis).

Interspinous decompression (spacers) and interlaminar stabilization devices used without fusion are considered unproven and not medically necessary because the evidence is insufficient to demonstrate efficacy when used without fusion.

Policy identification: CS363LA.D; retired April 1, 2026 (effective March 1, 2026 – March 31, 2026 period noted in the policy).

Key thresholds and scope

Nonoperative treatment duration6 months failure of nonoperative treatment required

Degenerative scoliosis limit≤ 25° for static interspinous distraction devices

Spondylolisthesis grade limit≤ Grade I (no more than Grade I)

Imaging stenosis severityMild to moderate stenosis defined as 25–50% reduction in lateral/central foraminal diameter vs adjacent levels

Sitting toleranceSitting for at least 50 minutes without pain (neurogenic claudication relieved by flexion)

Walking abilityAble to walk at least 50 feet

BMI exclusionBMI ≥ 40 — not indicated

State scopeLouisiana-specific policy

StatusRETIRED

Effective date2026-03-01

Medical-Necessity Criteria

Interspinous Fixation (fusion) Devices - Medically Necessary

Covered when ALL of the following are met:

ALL of the following

Performed according to FDA labeled indications, contraindications, warnings, and precautions
Back pain of discogenic origin, with degeneration of the disc confirmed by history and radiographic studies
No more than grade 1 spondylolisthesis≤ Grade I
Used with an interbody cage as an adjunct to fusion at a single level in the lumbar spine (L1-S1)L1-S1

Coding

Referenced CPT codes (informational; inclusion does not imply coverage)CPT

22853	Insertion of interbody biomechanical device(s) with integral anterior instrumentation to intervertebral disc space in conjunction with interbody arthrodesis, each interspace
22854	Insertion of intervertebral biomechanical device(s) with integral anterior instrumentation to vertebral corpectomy defect in conjunction with interbody arthrodesis, each contiguous defect
22859	Insertion of intervertebral biomechanical device(s) to intervertebral disc space or vertebral body defect without interbody arthrodesis, each contiguous defect
22867	Insertion of interlaminar/interspinous process stabilization/distraction device, without fusion, including image guidance when performed, with open decompression, lumbar; single level
22868	Insertion of interlaminar/interspinous process stabilization/distraction device, without fusion, including image guidance when performed, with open decompression, lumbar; second level
22869	Insertion of interlaminar/interspinous process stabilization/distraction device, without open decompression or fusion, including image guidance when performed, lumbar; single level
22870	Insertion of interlaminar/interspinous process stabilization/distraction device, without open decompression or fusion, including image guidance when performed, lumbar; second level
22899	Unlisted procedure, spine (when specified as insertion of a non-pedicle interspinous process fixation device)

Provider Actions & Billing Impact

Documentation Required

Medical record documentation required

The patient's medical record must fully support the medical necessity for the requested services. Records should document relevant medical history, physical examination findings, and results of pertinent diagnostic tests or procedures. Documentation must be legible, maintained in the patient's medical record, and made available upon request.

Relevant medical history
Physical examination findings
Pertinent diagnostic test or procedure results
Legible documentation maintained in the medical record and available upon request

Documentation Required

Adhere to FDA labeling when applicable

Interspinous fixation devices are covered only when performed according to the U.S. Food and Drug Administration (FDA) labeled indications, contraindications, warnings, and precautions.

Background and Evidence Summary

This policy reviews clinical evidence, device labeling, and professional guidance for interspinous/ interlaminar devices for lumbar spine conditions. The policy differentiates devices used as adjuncts to fusion from those used alone for decompression.

Interspinous fixation devices used in combination with an interbody cage as an adjunct to fusion may be medically necessary under the policy’s specified criteria and when used according to FDA labeling and clinical indications.

Interspinous decompression (spacers) and interlaminar stabilization devices when used without fusion are considered unproven and not medically necessary due to limited and generally low-quality evidence, small studies, and a lack of long-term comparative data.

Systematic reviews, meta-analyses, and technology assessments cited in the policy report mixed short-term symptom findings but note higher or uncertain reoperation rates and overall low or insufficient quality of evidence for long-term outcomes; these sources include multiple systematic reviews and assessments (for example, Ge 2025, Han 2024, Pennington 2024, Poetscher 2018, ECRI and Hayes reports).

Because of these evidence limitations and concerns about reoperation risk and inconsistent long-term benefit, the policy states that interspinous decompression/interlaminar devices used without fusion remain unproven and not medically necessary, while supporting selective use of fixation devices as adjuncts to fusion under defined criteria.

The policy also incorporates and summarizes NASS coverage recommendations and specific qualifying criteria and exclusions, and it was updated to add documentation requirements and revised definitions before being retired.

Evidence highlights

Definitions

Term	Definition
Arthrodesis	A surgical procedure to eliminate motion in a joint by providing a bony fusion. The procedure is used for several specific purposes including: relief of pain, provide stability, overcome postural deformity resulting from neurologic deficit, and to halt advancing disease.
Interlaminar Lumbar Instrumented Fusion (ILIF)	During the ILIF procedure, the surgeon makes an incision in the lower back and an opening is created through the ligaments to access the spinous processes. Bone, ligament or disc causing compression is removed to release pressure on the nerves. Allograft bone may be placed in the disc space. Autologous or allograft bone is placed between the spinous processes and on the remaining lamina. An implant is inserted to stabilize the spine and secure the spinous processes until the fusion takes place.
Interlaminar Stabilization Device	An implantable interspinous process device intended to provide symptomatic relief of claudicatory lumbar spinal stenosis by reducing lumbar extension while preserving range of motion in flexion, axial rotation, and lateral bending. The U-shaped titanium device is inserted between adjacent spinous processes and secured by serrated wings; it is implanted after decompression of stenosis at the affected level(s).
Interspinous Fixation Devices	Devices intended for attachment to the spinous processes for the purpose of achieving stabilization to promote fusion in patients with degenerative disc disease.
Interspinous Process Decompression (IPD)	A minimally invasive surgical procedure implanting a spacer between one or two affected spinous processes to distract (open) the neural foramen and decompress the nerves; spacers are implanted midline between adjacent lamina and spinous processes to provide dynamic stabilization following decompressive surgery and are purported to block stenosis-related lumbar extension.
Lumbar Spinal Stenosis (LSS)	Narrowing or constriction of the lumbar spinal canal that may result in painful compression of a nerve and/or blood vessel(s) supplying the nerve.
Neurogenic Claudication	Pain in the buttock, thigh, or leg or leg weakness that is relieved with a change in position or leaning forward and improves with rest; a common indicator of lumbar spinal stenosis and should be differentiated from vascular claudication.

Revision History

2026-03-01revised

Policy revised: added 'Medical Records Documentation Used for Reviews' language clarifying that benefit coverage is determined by federal, state, or contractual requirements; that medical records may be required to assess coverage but do not guarantee it; and that documentation must fully support medical necessity, be legible, maintained, and made available upon request. Definitions updated for Arthrodesis, Interlaminar Lumbar Instrumented Fusion (ILIF), Interlaminar Stabilization Device, and Neurogenic Claudication; supporting sections (Description of Services, Clinical Evidence, References) were updated. (Material change)

2026-04-01removedLatest

Policy retired effective April 1, 2026 due to Louisiana plan membership disenrollment. (Material change)

Policy Summary

PayerUnitedHealthcare

PolicyInterspinous Fusion Decompression Devices La Cs

Policy CodePolicy CS363LA.D

Change TypeRetirement and revised documentation/definitions (Mar 1, 2026)

Effective DateMar 1, 2026

Next Review DateN/A

Key ActionEnsure medical records fully support medical necessity (history, exam, pertinent diagnostic tests) and are legible and available upon request.

SourceLink

On This Page

Interspinous decompression and Interlaminar Stabilization systems (without fusion)

Not medically necessary when used alone:

Interspinous decompression and interlaminar stabilization systems (without fusion) for the treatment of spine pain or spinal stenosis are unproven and not medically necessary due to insufficient evidence of efficacy

NASS 2025 Coverage Recommendations (summarized constraints)

NASS guidance included in policy; items where interspinous fixation without fusion should NOT be used:

Not indicated in

Spondylolisthesis greater than Grade I> Grade I
Bilateral isthmic spondylolysis
Significant dynamic instability (e.g., flexion-extension views)
Scoliosis, or signs of coronal or rotatory instability
Fusion indicated at more than one level of the lumbar spinemultilevel
Generally not indicated for procedures at L5-S1 due to mechanical limitations (unless anatomy favorable)
Complete resection of the facet (unless accompanied by an interbody fusion)
Disc herniations: not indicated except as adjunct to primary excision in absence of instability or spondylolisthesis
Stenosis: not indicated as adjunct in absence of instability, foraminal stenosis, spondylolisthesis
Discogenic low back pain
A fusion is otherwise not indicated per NASS Coverage Recommendation for Lumbar Fusion

NASS 2025 Recommendations for Static Interspinous Distraction Devices (without fusion and used instead of decompression)

May be indicated when ALL qualifying criteria are met:

ALL of the following

Clinically symptomatic degenerative lumbar stenosis
Associated with neurogenic claudication that is relieved by lumbar flexion
Sitting for at least 50 minutes without pain≥ 50 minutes
Can walk at least 50 feet≥ 50 feet
Mild to moderate stenosis on CT or MRI defined as 25-50% reduction in lateral/central foraminal diameter compared to adjacent levels25-50% reduction
Failure of 6 months of nonoperative treatment6 months
No more than 25° of degenerative scoliosis≤ 25°
No more than a Grade I degenerative spondylolisthesis≤ Grade I
Open surgery (eg, laminectomy) is not a medically safe treatment option because of comorbidities

Not indicated when any of the following apply

Degenerative spondylolisthesis of Grade II or higher>= Grade II
Degenerative scoliosis greater than 25°> 25°
Dynamic instability at the operative level
Symptoms not relieved by flexion
Patient is medically suitable for a direct decompressive procedure (eg, laminectomy)
Patient has primarily axial back pain that is unrelated to activity

Medical Records Documentation Used for Reviews

Covered when ALL of the following are met:

Benefit coverage is determined by federal, state, or contractual requirements and applicable laws that may require coverage for a specific service; these govern when they differ from this policy.

Medical records documentation may be required to assess whether the member meets the clinical criteria for coverage but documentation does not guarantee coverage.

The patient's medical record must contain documentation that fully supports the medical necessity for the requested services.

Documentation includes but is not limited to relevant medical history, physical examination, and results of pertinent diagnostic tests or procedures.

Documentation supporting medical necessity should be legible, maintained in the patient's medical record, and made available upon request.

Definitions Updated

Definitions updated in this policy include:

Arthrodesis (definition updated)

Interlaminar Lumbar Instrumented Fusion (ILIF) (definition updated)

Interlaminar Stabilization Device (definition updated)

Neurogenic Claudication (definition updated)

Denial Risk

Not medically necessary if not meeting criteria

Claims for interspinous decompression devices or interlaminar stabilization devices used without fusion (i.e., as standalone decompression/spacer devices) are considered unproven and not medically necessary and may be denied.

Documentation Required

Maintain complete medical record

Providers must maintain complete, legible medical records that support the medical necessity of the requested services. Records should include the patient's relevant history, physical exam, and results of pertinent diagnostic tests or procedures and must be made available upon request.

Relevant medical history
Physical examination
Results of pertinent diagnostic tests or procedures
Legible records maintained and available upon request

Prior Authorization

Verify applicable benefit requirements

Before relying on this policy for coverage decisions, verify applicable federal, state, or contractual benefit requirements and laws, as they govern coverage when they differ from this policy.

Systematic reviews / meta-analysesMultiple reviews (Ge 2025; Han 2024; Pennington 2024; Poetscher 2018; others) report limited or mixed evidence for interspinous/interlaminar devices compared with decompression

RCT and cohort findingsSome RCTs and prospective studies show short-term improvements but inconsistent long-term superiority and methodological limitations (small samples, risk of bias)

Reoperation riskSystematic reviews note higher or uncertain reoperation rates for interspinous spacers versus standard decompression

Technology assessmentsECRI and Hayes assessments (2019–2024) conclude evidence is low quality or insufficient to determine long-term benefit

Device-specific evidenceEvaluations of Superion, Coflex, Minuteman show limited high-quality comparative data and need for longer-term RCTs

Quality limitationsCommon study limitations: small sample sizes, lack of blinding/randomization, short follow-up, single-center or retrospective designs

Clinical impact conclusionOverall evidence base judged limited or mixed; insufficient to support routine use without fusion in many scenarios

Guideline sourceNASS 2025 referenced for coverage recommendations and constraints

2026-03-01clarified

Non-material clarification added: language emphasizing that documentation supporting medical necessity should be legible, maintained in the patient's medical record, and made available upon request.

Prior lumbar surgery at the intended level