CurrentUnitedHealthcarePolicy CS080ID.B

Motorized Spinal Traction (for Idaho Only)

Policy governs coverage of motorized spinal traction (vertebral axial decompression) for members in the state of Idaho, including Idaho Medicaid Plus plans. It states the devices are unproven and not medically necessary for neck and low back disorders.

Policy Summary

PayerUnitedHealthcare

PolicyMotorized Spinal Traction (for Idaho Only)

Policy CodePolicy CS080ID.B

Change TypeNo material changes

Effective DateDec 1, 2025

Next Review Date

Key ActionDo not expect prior authorization approval for motorized spinal traction (S9090) for Idaho members; claims may be denied as not medically necessary.

SourceLink

POLICY UPDATE CHANGES

No material clinical or coverage changes in this revision.

Insufficient evidenceCoverage rationale conclusion

S9090Applicable procedure code

32RCTs in review

2,762Total participants

Case seriesDevice-specific evidence

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Coverage Determinations

Not Medically Necessary / Unproven

Covered when ALL of the following are met

Not covered: Motorized spinal traction devices are unproven and not medically necessary for treating neck and low back disorders due to insufficient evidence of efficacy.

Policy applies to Idaho members including Idaho Medicaid Plus

Evidence summary (no explicit coverage criteria in provided text)

Summary of clinical evidence and guideline positions relevant to coverage decisions

Evidence synthesis: Multiple randomized controlled trials and systematic reviews (including an updated Cochrane-derived review) found traction, including mechanical and motorized decompression, generally makes little or no difference in pain intensity, functional status, global improvement, or return to work compared with placebo, sham, no treatment, or other therapies; many individual trials show no superiority to sham or other modalities.

Sources: Wegner et al. 2013 systematic review and multiple RCTs (chunks 19,18,20)

Negative or inconclusive device-specific studies: Device-specific studies (DRX9000, IDD, VAX-D and similar systems) consist largely of retrospective case series and small randomized trials; some report within-group improvements but most show no difference versus sham or other treatments and have methodological limitations (no control groups, small sample sizes, short follow-up), limiting conclusions about efficacy.

Examples: Apfel 2010, Schimmel 2009, Unlu 2008, Macario 2008, Beattie 2008, Macario 2006 (chunks 20,21,22,23)

Guideline conclusions: Major clinical practice guidelines (ACP and NASS) conclude that the evidence is insufficient to recommend traction for acute, subacute, or chronic low back pain, lumbar disc herniation with radiculopathy, or lumbar spinal stenosis; evidence for neck pain is limited to case studies and well-designed RCTs are needed.

ACP 2017; NASS 2011, 2020/2021; neck evidence limited (chunks 25,26,24)

Motorized spinal traction devices, including vertebral axial decompression systems, are considered unproven and not medically necessary for the treatment of neck and low back disorders due to insufficient evidence of efficacy.

Published clinical evidence for treating neck (cervical) pain with vertebral axial decompression or other motorized traction is limited to case studies; well‑designed randomized controlled trials are needed and no established indication is supported by current data.

The body of evidence is insufficient to support coverage: motorized spinal traction devices are unproven and not medically necessary for neck and low back disorders, as systematic reviews and randomized trials show little or no consistent benefit.

Evidence for motorized spinal decompression and traction in non‑specific low back pain and chronic discogenic low back pain is limited and inconsistent: systematic reviews (including 32 RCTs) find little or no difference versus placebo, sham, or standard interventions, device‑specific reports are often small case series or retrospective studies, and methodological limitations (small samples, lack of controls, short follow‑up) prevent definitive conclusions.

Provider-facing Requirements and Implications

Prior Authorization

Prior authorization: verify plan and tool use

Prior authorization requirements vary by plan. Verify the member's specific benefit terms and any applicable federal or state contractual requirements before submitting an authorization request. UnitedHealthcare may also use external criteria tools (for example, InterQual®) to assist in benefit administration; confirm whether such tools apply to the member's plan and reference them when needed.

Check member plan terms and federal/state contractual requirements prior to authorization
Confirm whether InterQual® or other third‑party tools are used for review

Denial Risk

Denial risk due to insufficient evidence

Motorized spinal traction devices (vertebral axial decompression) are considered unproven with insufficient evidence of efficacy. Claims for these services may be denied when documentation does not demonstrate medical necessity consistent with applicable benefit language.

Devices such as motorized spinal traction/NSD (e.g., DRX9000) are viewed as experimental/unproven
Expect denial risk if supporting clinical evidence and plan-covered indications are not documented

Billing Rule

Coding and service description

Reference applicable billing codes and include a brief service description to aid claims submission. Listing of a code in this policy does not guarantee coverage; always reconcile with the member's benefit terms.

S9090 — Vertebral axial decompression, per session
Include description: computer-driven table applying controlled distraction via pelvic harness for spinal decompression

Documentation Required

Policy application and documentation

When applying this policy, reviewers must reference the federal, state, or contractual benefit terms that govern coverage for the member. This Medical Policy is informational and does not replace the plan's benefit language; in case of conflict, the federal/state/contractual requirements prevail.

Policy is informational — confirm and follow the member's plan/federal/state contractual coverage terms
In case of conflict, federal/state/contractual requirements govern

Step Therapy

No step therapy favoring traction

There is no evidence-based requirement to implement step therapy that favors traction prior to other standard treatments. Evidence does not support adding traction to physiotherapy as superior to physiotherapy alone.

Do not require traction as a step before other guideline-recommended conservative therapies
Traction added to physiotherapy has not demonstrated superiority and should not be mandated as a prior step

Note

Step therapy context

Clinical guideline context: major societies (ACP, NASS) conclude evidence is insufficient to recommend traction for acute, subacute, or chronic low back pain. Use these guideline positions to inform step therapy or coverage-design decisions, recognizing traction is not established as first-line therapy.

ACP (2017): evidence insufficient to determine effectiveness of traction for LBP
NASS (2011, 2020/2021): evidence insufficient to recommend traction for subacute or chronic LBP and related conditions

Key Terms and Device Examples

Vertebral axial decompression (definition & mechanism)

DefinitionVertebral axial decompression is a type of motorized spinal traction in which a computer-driven table applies a series of extension and distraction cycles via a pelvic harness to produce spinal unloading.

Core mechanismThe device slowly extends the table and applies a distraction force through a pelvic harness to reach a desired tension, which is then gradually decreased over repeated cycles.

Treatment deliveryTherapy is delivered in multiple sessions; the number and duration of sessions vary by protocol.

Examples of motorized traction / non‑surgical spinal decompression systems

DRX9000A motorized non‑surgical spinal decompression (NSD) system used in clinical studies (e.g., Koçak et al. compared DRX9000-based NSD to chiropractic manual therapy).

IDD (Intervertebral Differential Dynamics Therapy)A motorized traction system studied in RCTs (Schimmel et al. 2009) delivering incrementally increased traction up to a specified percentage of body weight versus sham traction.

VAX-DA prone lumbar traction system evaluated in prospective case series (Beattie et al. 2008) using frequent 30‑minute sessions over an 8‑week course with reported within‑group improvements but without randomized controls.

Common intentThese devices apply mechanical distraction to the spine with the stated goal of reducing disc pressure and improving pain and function, though randomized evidence is limited or inconclusive.

OpenPayer

Motorized Spinal Traction (for Idaho Only)

Coverage Determinations

Procedure and Billing Codes

Provider-facing Requirements and Implications

Background and Context

Key Terms and Device Examples

Policy Revision History