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.