HCPCS Code S9090: Vertebral axial decompression

## **S9090 documentation requirements** Thorough records demonstrate medical necessity and support clean claims. ### **Diagnosis and clinical findings** Document the precise lumbar diagnosis with ICD-10 codes, such as degenerative disc disease, radiculopathy, or disc herniation, and describe baseline pain, neurologic findings, and functional limits relevant to pain relief goals. ### **Plan of care and goals** Outline frequency, expected number of sessions, target outcomes (pain, mobility, ADLs), and how S9090 fits into a multimodal plan that may include physical therapy, home exercise, and medications. ### **Session details** Record date, total time, device used, programmed traction forces, duty cycles, positioning (for example, a prone lumbar traction protocol), and the patient’s tolerance and immediate response. ### **Device identification** Identify the model or platform used (for example, vertebral axial decompression (VAX-D), DRX-9000, or Lordex lumbar spine system) and note safety checks prior to treatment. ### **Medical necessity and progression** Explain why decompression was selected over alternatives, list prior treatments tried and failed, and track interval progress with validated scales. Include criteria for continuation, modification, or discontinuation. ### **Concurrency with other services** When performed alongside therapeutic exercise, manual therapy, or supervised modalities, document each service distinctly with time and clinical rationale to avoid overlap and to support any distinct procedural billing.

## **S9090 billing requirements** Payer rules vary widely, so align each claim with payer policy. ### **Code selection and payer policy** Report S9090 for “vertebral axial decompression, per session” when accepted by a commercial payer. Many payers consider this service investigational due to insufficient evidence, and Medicare typically does not cover S9090. In Medicare settings, payers may direct you to alternatives such as CPT 97012 for mechanical traction or unlisted codes when appropriate. ### **Frequency and units** Bill one unit per session as delivered. Ensure the number of sessions billed matches the documented visits and the signed plan of care. ### **Prior authorization and ABN strategy** Check for prior authorization requirements. For Medicare beneficiaries, use ABN workflows when a service is expected to be non-covered and follow the payer’s liability modifiers to protect the claim. ### **Claim detail integrity** Include the precise service date, site of service, ordering and rendering provider, and link diagnosis codes that support the session. Ensure documentation is available to demonstrate medical necessity and distinct services when billed on the same day. ### **Denials and patient-pay scenarios** Common denial reasons include lack of prior authorization, inadequate documentation, or payer policies citing a lack of peer-reviewed medical literature support. If coverage is denied, communicate financial responsibility clearly before scheduling ongoing sessions.

## **S9090 applicable modifiers** Use modifiers that reflect coverage expectations or distinct services when required by payer policy: - GA: ABN on file when the service is expected to be non-covered for a Medicare beneficiary. - GX: Voluntary ABN issued for a statutorily non-covered service. - GZ: Expected denial with no ABN on file. - 59: Distinct procedural service when S9090 is separately reportable from other services on the same date under payer rules. - 25: Significant, separately identifiable E/M service by the same provider on the same day as S9090, when supported by documentation. Always verify each payer’s modifier requirements before submission.

## **Other relevant codes** These services are frequently billed with or instead of S9090, depending on payer policy and clinical presentation. Confirm active status and payer guidance. - 97012: Mechanical traction application. - 97110: Therapeutic exercises for strength, endurance, ROM, and flexibility. - 97112: Neuromuscular reeducation of movement, balance, coordination, and posture. - 97140: Manual therapy techniques. - 97530: Therapeutic activities to improve functional performance. - 97161–97163: Physical therapy evaluation, by complexity.