HCPCS Level II code S9379 designates a per diem for home infusion therapy administrative and professional pharmacy services not otherwise classified. The code covers care coordination, pharmacy professional services, and necessary supplies and equipment tied to home infusion therapy; drugs and nursing visits are billed separately. Nationally, this code matters as home infusion grows as an alternative to facility-based care and payers refine coverage and billing for bundled home infusion services.

Key payers addressed in this analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise overview of what S9379 represents, typical sites of service, common modifier usage (listed elsewhere), and how the code interacts with separately billed drug and nursing services. The publication provides clinical context for home infusion administration, explains the scope of services captured in the per diem, and outlines typical billing practices and areas where payers commonly apply rules and prior authorization. Data not available in the input is noted where relevant.

The piece is intended to inform revenue cycle managers, clinicians overseeing home infusion programs, and policy analysts about the operational and billing implications of HCPCS Level II code S9379, including topics readers can expect: benchmark considerations, common payer coverage patterns, and policy or billing updates affecting home infusion per‑diem reporting.