Summary & Overview
HCPCS S9379: Home Infusion Administrative and Pharmacy Services
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.
Billing Code Overview
HCPCS Level II code S9379 describes home infusion therapy, infusion therapy, not otherwise classified. The code captures a per diem bundle of administrative services, professional pharmacy services, care coordination, and all necessary supplies and equipment associated with home infusion therapy. Drugs and nursing visits are coded separately and are not included in this per diem.
Service type: Home infusion administrative and professional pharmacy services (per diem)
Typical site of service: Patient's home or other non‑acute residential setting where home infusion care is delivered
Clinical & Coding Specifications
Clinical Context
A 68-year-old patient with chronic heart failure and recurrent exacerbations is discharged from the hospital but requires ongoing intravenous diuretic therapy and electrolyte monitoring at home. The home infusion pharmacy sets up a per diem home infusion service to coordinate supplies, professional pharmacy services, medication compounding, and administrative oversight while nursing visits for infusion administration and the drug product itself are billed separately.
The clinical workflow includes: referral from the discharging physician to a home infusion provider; initial pharmacist review and medication reconciliation; delivery of infusion supplies and infusion pump; scheduling of home health nursing visits for line access and infusion administration (nursing time and drug coded separately); ongoing care coordination between the pharmacist, home health agency, and the patient’s primary cardiologist for dose adjustments, adverse event monitoring, and insurance authorization. Communication is documented in the medical record and prior authorization paperwork is maintained by the home infusion provider.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
00 | No modifier — service furnished as stated | Use when no special circumstances apply to the per diem home infusion administrative service |