ModifiedUnitedHealthcarePolicy CS080TN.P

Motorized Spinal Traction (for Tennessee Only)

This policy governs coverage of motorized spinal traction (vertebral axial decompression) for Medicaid and CoverKids members in Tennessee, specifying that these devices are considered unproven and not medically necessary for neck and low back disorders.

Policy Summary

PayerUnitedHealthcare

PolicyMotorized Spinal Traction (for Tennessee Only)

Policy CodePolicy CS080TN.P

Change TypeClinical evidence and references updatedprior version archived

Effective DateJun 1, 2026

Next Review Date

Key ActionCheck applicable benefit plan requirements before requesting prior authorization; claims for motorized spinal traction may be denied as the therapy is considered unproven and not medically necessary.

SourceLink

POLICY UPDATE CHANGES

Supporting Information, Clinical Evidence, and References sections were updated to reflect the most current information; previous policy version archived.

Tennesseestate applicability

S9090listed reference procedure code

Not medically necessarycoverage stance

Numerous RCTsevidence summarized

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Coverage Determination

Not medically necessary / Unproven

Covered when ALL of the following are met

Coverage stance: Motorized spinal traction devices (vertebral axial decompression) are unproven and not medically necessary for treating neck and low back disorders due to insufficient evidence of efficacy.

Policy applies to Tennessee Medicaid and CoverKids.

Evidence-based summary

Coverage stance derived from clinical evidence and guideline conclusions in this document segment

Evidence summary: Systematic reviews, randomized controlled trials, and professional guideline assessments report little or no impact of traction (manual or mechanical) on pain, functional status, global improvement, or return to work for nonspecific low back pain; effects reported for cervical radiculopathy are of low quality and not clinically meaningful. Hayes assigned a rating of D for mechanized spinal distraction therapy due to insufficient, low-quality evidence and safety concerns in certain populations.

Key sources: Cochrane/Systematic reviews (Wegner et al.; Colombo et al.), ACP and NASS guidelines, Hayes HTA; multiple RCTs and case series summarized in policy.

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

Hayes performed a Health Technology Assessment of mechanized spinal distraction therapy (including VAX‑D and DRS systems) and, because of limited and methodologically flawed studies, assigned a Hayes rating of D for mechanized spinal distraction therapy in individuals with low back pain and in subgroups where safety concerns exist (for example, pregnant women and those with osseous stenosis, unstable spine, spinal surgical implants, inflammatory disease, vertebral fractures, severe osteoporosis, cauda equina syndrome, or unstable spondylolisthesis).

The rationale for noncoverage is based on systematic reviews, randomized trials, and professional guideline conclusions showing mixed results, methodological limitations, and generally low-quality evidence for motorized spinal traction/vertebral axial decompression. High-quality reviews and guideline statements find little or no clinically meaningful benefit of traction on pain, function, or return-to-work outcomes, and the available RCTs do not provide robust, generalizable support for routine use.

Traction therapies — including mechanized spinal decompression — lack consistent high-quality evidence of effectiveness. Systematic reviews conclude traction offers little or no impact on key outcomes for low back pain, Hayes found insufficient and methodologically limited data for mechanized spinal distraction, and clinical practice guidelines (ACP, NASS) consider the evidence insufficient to recommend traction for acute, subacute, or chronic low back pain or lumbar disc herniation with radiculopathy.

Applicable Codes

Applicable CodesHCPCS

S9090

Vertebral axial decompression, per session

Provider Actions & Billing

Prior Authorization

Prior Authorization / Coding Note

Prior authorization and coding: S9090 (Vertebral axial decompression, per session) is listed for reference but vertebral axial decompression and motorized spinal traction devices are considered unproven and not medically necessary per this policy. Inclusion of S9090 does not imply coverage or guarantee payment; verify benefit plan coding and billing rules before submission.

S9090 — Vertebral axial decompression, per session (listed for reference only).
Prior authorization may be required by the member's specific benefit plan; listing here is not authorization.

Prior Authorization

Prior Authorization and Utilization Management

Prior authorization and utilization management: Reviewers should check the applicable federal, state, and contractual benefit plan requirements to determine whether prior authorization or other utilization management tools apply. UnitedHealthcare may use third-party clinical tools (e.g., InterQual) to assist in benefit administration.

Confirm member-specific prior authorization requirements before scheduling or billing.

Key Definitions

Vertebral axial decompression / motorized spinal traction — definition

TermVertebral axial decompression / motorized spinal traction

DefinitionA type of spinal traction using a computer‑driven table and a pelvic harness to apply controlled cyclical distraction forces to the spine; the table is slowly extended to apply tension, which is then gradually decreased over a series of treatment cycles.

Procedure elementsIndividual lies on a special table with a pelvic harness; computer control applies distraction forces in repeated cycles; number of sessions varies.

Intended useTreatment of back or neck pain (non‑surgical spinal decompression).

Policy stance (Tennessee Medicaid/CoverKids)Considered unproven and not medically necessary for treatment of neck and low back disorders due to insufficient evidence of efficacy.

Policy Revision History

2026-06-01Clinical evidence and references updatedLatest

Supporting Information, Clinical Evidence, and References sections were updated to reflect the most current information; previous policy version CS080TN.O was archived.

Policy Summary

PayerUnitedHealthcare

PolicyMotorized Spinal Traction (for Tennessee Only)

Policy CodePolicy CS080TN.P

Change TypeClinical evidence and references updatedprior version archived

Effective DateJun 1, 2026

Next Review Date

SourceLink

On This Page

Utilization management tools (e.g., InterQual) may be applied to coverage determinations.

Denial Risk

Coverage Determination and Denial Risk

Coverage determination and denial risk: Because vertebral axial decompression and motorized spinal traction devices are considered unproven and not medically necessary, claims for these services may be denied. Policy updates or jurisdictional benefit requirements can change coverage; follow the applicable plan terms when making coverage decisions.

Claims may be denied as not medically necessary when the service is vertebral axial decompression or similar motorized traction.
Review federal/state/contractual requirements — they govern in the event of conflict with this policy.

Note

Procedure Description

Procedure description: Vertebral axial decompression is a computer-driven form of spinal traction. A pelvic harness is applied and the individual lies on a specialized table that slowly extends while a controlled distraction force is applied via the harness in repeated cycles; tension is held and then gradually released. Session counts vary by treatment course.

Mechanics: pelvic harness + computer-driven table applying controlled distraction cycles.
Use: treatment of back or neck pain; number of sessions varies.

Documentation Required

Required Documentation and Policy Use

Required documentation and policy use: When reviewing requests or claims, document clinical rationale and supporting evidence. Reference federal, state, or contractual benefit plan requirements; in the event of conflict, those requirements govern. UnitedHealthcare may reference third-party criteria to support determinations.

Include clinical records that justify medical necessity if asserting coverage despite policy stance.
Document dates of service, treatment plan, objective findings, and prior conservative therapies if applicable.
Adjudicators must apply applicable federal/state/contractual rules and may use third-party criteria (e.g., InterQual).

Step Therapy

No Step Therapy Pathway Specified

Step therapy: No step therapy pathway is specified in this policy. There is no established stepwise authorization or trial-of-therapy requirement outlined here; however, individual benefit plans may impose their own step therapy or conservative-therapy prerequisites.

No step therapy pathway is provided in this policy document segment.
Verify member-specific plan terms for any step therapy or conservative care requirements.

Denial Risk

Provider Actions — Summary

Provider actions summary: Because the intervention is considered unproven and not medically necessary, providers should anticipate possible denials and must verify benefit coverage, obtain any required prior authorizations, and supply complete documentation to support medical necessity if requesting coverage.

Anticipate denial risk for vertebral axial decompression (S9090) as not medically necessary.
Obtain prior authorization if the member's plan requires it and submit full clinical documentation.
Follow applicable federal/state/contractual rules; use third-party tools as applicable.

vertebral axial decompression / mechanized spinal distraction therapy — alternate term & evidence mapping

Alternate termvertebral axial decompression / mechanized spinal distraction therapy

Definition mappingNon‑surgical spinal decompression achieved with mechanized or motorized traction devices that apply controlled axial distraction to the spine (e.g., VAX‑D, DRS, IDD, Accu‑SPINA).

Evidence summarySystematic reviews and RCTs report mixed or low‑quality evidence; Hayes assigned a rating of D indicating insufficient evidence of efficacy and safety concerns in specified populations.

Populations of concernHayes rated mechanized spinal distraction therapy D for pregnant women and individuals with osseous stenosis, unstable spine, surgical implants, inflammatory disease, vertebral fractures, severe osteoporosis, cauda equina syndrome, or unstable spondylolisthesis.

Clinical implicationTraction (manual or mechanical) shows little or no impact on pain, function, or return to work for nonspecific low back pain per systematic reviews; further high‑quality RCTs needed.

Vertebral axial decompression is a computer-driven, motorized form of spinal traction that applies controlled cyclical distraction to the spine (typically using a pelvic harness and a motorized table) with the goal of reducing spinal pressure and relieving neck or back pain. Despite this mechanized delivery, published evidence (RCTs and systematic reviews) demonstrates mixed or low-quality results and does not establish consistent, clinically meaningful benefit, which underlies the policy determination that the therapy is unproven and not medically necessary.