Summary & Overview
HCPCS S9363: Home Infusion Anti-Spasmotic Therapy, Per-Diem
HCPCS Level II code S9363 covers the per-diem administrative and professional pharmacy services related to home infusion anti-spasmotic therapy, including care coordination and provision of necessary supplies and equipment, with drugs and nursing visits billed separately. This code matters nationally as home infusion grows as an alternative to inpatient care for chronic spasticity management and as payers and providers seek clear billing pathways for bundled professional services supporting at-home drug delivery. Key payers discussed include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will learn how S9363 is defined and used in practice, the typical site-of-service and service components, and the policy and billing implications for payers and providers. The publication provides benchmarks where available, highlights common payer coverage patterns, and explains administrative considerations relevant to billing and claims processing. It also summarizes clinical context around anti-spasmotic infusion therapy in the home setting and notes areas where input data were not provided. Data not available in the input: associated taxonomies, specific ICD-10 diagnoses, related codes, detailed payer-specific coverage rules, and service-line financial benchmarks.
Billing Code Overview
HCPCS Level II code S9363 describes home infusion therapy, anti-spasmotic therapy; administrative services, professional pharmacy services, care coordination, and all necessary supplies and equipment (drugs and nursing visits coded separately), per diem. The service type is home infusion therapy administration and associated professional/administrative support. The typical site of service is the patient's home, where pharmacy professionals coordinate therapy, manage supplies and equipment, and oversee clinical administration while drugs and nursing visits are billed separately.
Clinical & Coding Specifications
Clinical Context
A typical patient is an adult with spasticity from a central nervous system disorder (for example, multiple sclerosis or spinal cord injury) who requires ongoing home infusion of an antispasmodic agent delivered via intermittent infusion or continuous pump. The patient is discharged from an inpatient neurology or rehabilitation unit with a home infusion plan. A pharmacy-based infusion services team provides administrative services, professional pharmacy management, care coordination, patient and caregiver education, home delivery of the medication and supplies, and oversight of device setup; drugs and nursing visits are billed separately. The clinical workflow includes physician order and authorization, pharmacist verification and compounding, training of patient/caregiver on pump operation and aseptic technique, coordination of visiting nurse services for catheter insertion or dressing changes if required, scheduled deliveries of medication and supplies, monitoring for efficacy and adverse effects, and periodic clinician follow-up to adjust dosing. Typical monitoring includes assessment of muscle tone, functional status, potential sedation or hypotension, and catheter/pump integrity. Documentation includes the physician order, pharmacy dispensing record, infusion plan, education notes, and care coordination communications.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
26 | Professional component | Use when billing only the professional component of a service related to infusion management provided by a physician or pharmacist when payer requires split billing. |