Summary & Overview
HCPCS S9494: Home Infusion Administrative and Pharmacy Services
HCPCS Level II code S9494 denotes per-diem administrative and professional pharmacy services for home infusion antibiotic, antiviral, or antifungal therapy. It covers care coordination, pharmacy oversight, and necessary supplies and equipment while drugs and nursing visits are billed separately. Nationally, this code is important as home infusion expands as an alternative to inpatient care, affecting pharmacy management, care coordination workflows, and payer reimbursement models for outpatient antimicrobial therapy.
Key payers in this analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise overview of the code’s clinical and service context, guidance on typical site-of-service use, common modifier practices (listed separately), and what to expect when billing this per-diem administrative code alongside separate drug and nursing charge lines. The publication also summarizes benchmarks and payer coverage considerations, and highlights policy and billing cautions relevant to home infusion programs.
This summary is intended for national audiences — clinicians, home infusion pharmacists, revenue cycle staff, and policy analysts — seeking clear, practical context about when and how S9494 is used and its role within home-based antimicrobial therapy.
Billing Code Overview
HCPCS Level II code S9494 describes home infusion therapy administrative services provided on a per-diem basis for antibiotic, antiviral, or antifungal regimens. The code covers professional pharmacy services, care coordination, and all necessary supplies and equipment associated with home infusion therapy; drugs and nursing visits are coded separately. This code is intended for per-diem administrative and pharmacy management of intermittent or continuous home infusion antibiotic/antiviral/antifungal therapy.
Service Type: Home infusion therapy administrative and professional pharmacy services, care coordination, and supplies
Typical Site of Service: Patient home (home health/home infusion setting)
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Clinical & Coding Specifications
Clinical Context
A 68-year-old patient with a central line is discharged from the hospital following treatment for a severe gram-negative bacteremia and is appropriate for continued intravenous antibiotic therapy at home. Home health coordination arranges a per diem home infusion therapy program where the pharmacy provides administrative services, professional pharmacy oversight, care coordination, and all necessary supplies and equipment; the actual antimicrobials and nursing visits are billed separately. Typical workflow: physician orders home infusion per discharge orders; home infusion provider verifies eligibility and authorizations, arranges durable medical equipment and supplies, schedules nursing visits for line care and monitoring, provides patient and caregiver education, and performs care coordination with the prescriber and payors. Documentation includes a signed physician order, plan of care, medication administration records, nursing notes, pharmacy clinical documentation, and billing records indicating per diem administrative/support services billed with S9494 while drugs and direct nursing care are billed under their respective HCPCS/CPT or NDC and revenue codes.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
22 | Increased procedural services | Use when extra administrative or coordination effort is documented beyond typical per diem services. |