Summary & Overview
HCPCS Level II S9476: Vestibular Rehabilitation Program, Non-Physician, Per Diem
HCPCS Level II code S9476 designates a per-diem vestibular rehabilitation program delivered by a non-physician provider. Vestibular rehabilitation targets balance, dizziness, and related vestibular dysfunctions; a per-diem billing structure reflects bundled daily therapy services rather than individual procedure units. Nationally, this code matters for therapy access, benefits design, and payment policy for rehabilitative services outside physician-administered visits.
Key payers in the analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find an overview of clinical context for vestibular rehabilitation, the typical sites of service where S9476 is used, and how per-diem rehab billing differs from session-based codes. The publication outlines benchmark considerations, common billing modifiers observed in practice, and implications for coverage determinations and authorization processes. It also summarizes payer variability in coverage approach and expected documentation elements that support medical necessity for vestibular programs.
This article serves clinicians, billing professionals, and policy analysts seeking concise guidance on the role and administrative characteristics of HCPCS Level II code S9476 within national payer landscapes.
Billing Code Overview
HCPCS Level II code S9476 represents a vestibular rehabilitation program delivered by a non-physician provider and billed per diem. The service type is rehabilitation therapy focused on vestibular (balance) disorders. The typical site of service is outpatient rehabilitation clinics or therapy centers, including community-based therapy programs and specialty vestibular clinics.
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Clinical & Coding Specifications
Clinical Context
A 68-year-old patient presents to an outpatient physical therapy clinic with progressive imbalance, recurrent falls, and vertigo symptoms over several months following a left-sided vestibular neuritis. The patient has difficulty with head movement tolerance, dynamic gait activities, and visual dependency when walking in crowds. The non-physician vestibular therapist performs an initial evaluation that includes symptom history, functional balance and gait assessments (Timed Up and Go, Dynamic Gait Index), and focused vestibular testing (e.g., bedside head impulse observation, Dix–Hallpike maneuver as indicated). A plan of care is established for a structured vestibular rehabilitation program delivered by a non-physician provider (physical therapist) on a per diem basis covering individualized therapeutic exercises, habituation and gaze-stability training, balance and gait retraining, patient education, and home exercise progression. Typical workflow: referral from primary care or ENT → evaluation visit with documentation of baseline function and goals → scheduled per-diem treatment sessions billed under S9476 for each day of service provided by the non-physician vestibular rehabilitation provider → periodic re-evaluation every 4–6 weeks with outcome measures and plan updates until goals are met or discharge. Common payer interactions include authorization checks, application of applicable modifiers for unusual circumstances, and coordination with durable medical equipment or ancillary services if needed.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
00 |