Summary & Overview
HCPCS S9377: Home Infusion Hydration >3 L/Day, Per Diem
HCPCS Level II code S9377 represents a per-diem payment for home infusion hydration therapy exceeding three liters per day, covering administrative services, professional pharmacy services, care coordination, and supplies (with drugs and nursing visits billed separately). This code matters nationally as home infusion expands care options for patients requiring high-volume hydration outside institutional settings, affecting reimbursement pathways for providers, pharmacy benefit managers, and payers.
Key payers addressed include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find an overview of what S9377 encompasses, typical sites of service, and the role of separate billing for drugs and nursing services. The publication outlines common modifiers used with this service, payer coverage patterns, and operational considerations for billing and care coordination. It also summarizes implications for pharmacy services and supply handling tied to per-diem billing.
This summary provides a national perspective on clinical context and billing structure rather than state-specific policy. Data not provided in the input — including associated taxonomies, specific ICD-10 diagnoses, related codes, and detailed payer-specific reimbursement rates — are noted as not available.
Billing Code Overview
HCPCS Level II code S9377 describes home infusion therapy for hydration involving more than three liters per day, and it covers administrative services, professional pharmacy services, care coordination, and all necessary supplies. The code is billed on a per diem basis. Drugs and nursing visits are coded separately and are not included in this per-diem payment.
Service type: Home infusion hydration therapy, high-volume (>3 L/day), per diem administrative and professional services
Typical site of service: Patient's home or other home-like setting where infusion therapy is administered outside of an inpatient facility
Clinical & Coding Specifications
Clinical Context
A 68-year-old homebound patient with advanced congestive heart failure and chronic kidney disease experiences recurrent volume depletion and requires ongoing outpatient hydration. The home infusion provider coordinates daily per diem services to deliver more than three liters of intravenous fluids each day, including administrative services, professional pharmacy oversight, care coordination, and necessary supplies; drugs and nursing visits are billed separately. Typical workflow: a treating physician orders home hydration specifying volume (>3 L/day) and duration; the pharmacy verifies the order, prepares fluids and supplies, arranges delivery, and performs medication reconciliation; a home health nurse performs vascular access assessment and connects the infusion pump, monitors vital signs and intake/output during visits that are billed separately; the infusion vendor bills per diem administrative and professional pharmacy services under S9377 while documenting care coordination notes, supply utilization, and communication with the physician and insurer.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
22 | Increased procedural services | Use when services required significantly greater resources or time than typical administrative/professional pharmacy services for S9377. |