Summary & Overview

HCPCS S9349: Home Infusion Tocolytic Administrative and Pharmacy Services

HCPCS Level II code S9349 represents the per diem administrative and professional pharmacy services, care coordination, and necessary supplies and equipment associated with home infusion tocolytic therapy, with drugs and nursing visits billed separately. This code matters nationally as home-based tocolytic infusion supports outpatient management of preterm labor risks and can affect utilization, payer policy design, and care coordination models.

Key payers covered in this analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find an overview of the clinical and billing context for S9349, typical sites of service, and which elements are included in the per diem charge versus billed separately. The publication outlines common modifiers and coding considerations, summarizes payer coverage patterns, and highlights benchmarks and policy updates relevant to home infusion administrative billing. It also provides practical clarity on documentation and billing boundaries for entities submitting claims for tocolytic home infusion services.

The content is national in scope and intended for billing professionals, pharmacy providers, clinician leaders, and payer policy analysts seeking concise guidance on how S9349 is used and reimbursed across major payers.

AetnaBlue Cross Blue ShieldCigna HealthUnitedHealthcareMedicareS9349HCPCS Level IIhome infusiontocolytic therapypharmacy servicescare coordinationper diemmedical billing

Billing Code Overview

HCPCS Level II code S9349 describes home infusion therapy for tocolytic infusion therapy, covering administrative services, professional pharmacy services, care coordination, and all necessary supplies and equipment on a per diem basis. The code specifies that drugs and nursing visits are billed separately and are not included in this per diem administrative/service charge.

Service Type: Home infusion administrative and pharmacy care coordination for tocolytic therapy

Typical Site of Service: Patient's home (home infusion setting)

Clinical & Coding Specifications

Clinical Context

A 30-year-old pregnant patient at 28 weeks' gestation presents with symptomatic preterm labor characterized by regular uterine contractions and cervical change. After evaluation in the obstetrics unit, the clinical team determines that short-term tocolysis is indicated to delay delivery for corticosteroid administration and fetal transfer if needed. The patient is clinically stable, desires home-based management, and meets criteria for outpatient infusion therapy. A per diem home infusion program is arranged that provides administrative services, professional pharmacy management, care coordination, and all necessary supplies and equipment for continuous or intermittent tocolytic infusion.

In the typical workflow: the obstetrician documents the indication and treatment plan and orders home infusion tocolytic therapy. A specialty pharmacy prepares the infusion medications (drugs billed separately) and coordinates nursing visits. A registered nurse performs home assessments, starts and monitors the infusion, provides patient education on infusion device and warning signs, and communicates updates to the obstetrician. The pharmacy manages dosing adjustments, sterile compounding, and supply logistics. Care coordination includes prior authorization, scheduling of nursing visits, emergency instructions, and arranging transport back to hospital if maternal or fetal status deteriorates. Billing uses S9349 as the per diem administrative/professional services and supplies charge, while the tocolytic drug and nursing visits are billed separately under their respective HCPCS/CPT codes.

Coding Specifications

Modifier	Description	When to Use
`22`	Increased procedural services	Use when the home infusion administrative services require substantially greater resources than typical (complex coordination, extended nursing time).
`23`	Unusual anesthesia	Rare for home tocolysis; use if anesthesia services are provided unusually for a procedure component.
`26`	Professional component	Use when billing only the professional component of a separately payable service related to the infusion program.
`32`	Mandated services	Use when services are provided due to an administrative requirement (e.g., court or public health order).
`52`	Reduced services	Use if services are partially furnished on the per diem day (e.g., abbreviated administrative support).
`59`	Distinct procedural service	Use to indicate a distinct service not normally reported together with another service on the same day (e.g., separate infusion-related administrative day).
`76`	Repeat procedure by same physician	Use when a similar home infusion administrative per diem is billed again the same day by the same provider for a repeated session.
`80`	Assistant at surgery	Use if an assistant provider is involved in an associated procedure requiring billing of assistant services (uncommon for home infusion).
`82`	Assistant not available	Use when assistant surgeon is not available and the assistant-at-surgery services are performed by a different qualified provider type.
`CQ`	Service furnished as part of a home health plan of care	Use when the tocolytic infusion administrative services are provided under an established home health plan.
`QX`	Ordering physician not enrolled in program (modifier to be used with QK/QY)	Use when the ordering provider lacks required enrollment and a qualified non-physician practitioner furnished services.
`QY`	Services furnished by a qualified non-physician practitioner	Use when a qualified NPP (e.g., nurse practitioner) furnishes the professional services for the home infusion program.
`SD`	Service performed in a distinct setting (facility reporting)	Use to indicate a separately payable service when facility reporting rules apply.
`TG`	Service provided under a tribal contract health service delivery area	Use when services are furnished under applicable tribal/Indian Health Service arrangements.

Taxonomy Code	Specialty	Notes
`163W00000X`	Obstetrics & Gynecology	Obstetricians direct tocolytic therapy and determine candidacy for home infusion.
`163K00000X`	Maternal-Fetal Medicine	High-risk pregnancy specialists manage complicated preterm labor cases and consult on home infusion suitability.
`363L00000X`	Pharmacy	Clinical pharmacists/infusion pharmacists manage compounding, dosing, and medication safety for tocolytics.
`163W00000X-RN`	Registered Nurse (Infusion)	Home infusion RNs perform assessments, start and monitor infusions, and provide patient education.
`363A00000X`	Home Health Agency	Agencies coordinate visits and logistics for home infusion services.

Related Diagnoses

ICD-10 Code	Description	Clinical Relevance
`O60.1`	Preterm labor with preterm delivery	Primary indication for tocolytic therapy to delay delivery and allow fetal maturation.
`O47.13`	False labor, third trimester	Differentiation diagnosis; may prompt observation and consideration of home infusion only if true labor subsequently identified.
`O60.02`	Preterm labor without delivery, unspecified gestational age	Indicates active preterm contractions where tocolysis may be considered to delay labor.
`O99.89`	Other diseases and conditions complicating pregnancy, childbirth and the puerperium	Used when concurrent maternal conditions complicate management and require coordinated infusion care.
`Z76.89`	Encounter for health monitoring and follow-up	Used for documented home health monitoring days and per diem administrative coordination associated with home infusion services.

Related CPT Codes

CPT Code	Description	Relationship to This Procedure
`96413`	Chemotherapy administration, intravenous infusion technique; up to 1 hour, single or initial substance/drug	Commonly used as an analogous code for billing skilled nursing infusion administration time when specific infusion drug administration codes apply; nursing visits for infusion monitoring are billed separately and may map to infusion administration CPTs.
`96365`	Intravenous infusion, for therapy, prophylaxis, or diagnosis; initial, up to 1 hour	May be used for reporting initial intravenous infusion administration when nursing documents timed infusion services accompanying the home tocolytic drug.
`96366`	Intravenous infusion, each additional hour (List separately in addition to primary code)	Used to report additional hourly infusion time beyond the initial hour for prolonged tocolytic infusion nursing time.
`99441`	Phone evaluation and management service by a physician or other qualified healthcare professional, 5-10 minutes of medical discussion	Used for brief telephonic follow-up or care coordination related to home infusion management.
`99443`	Phone evaluation and management service, 21-30 minutes	For longer telehealth or telephone management contacts related to infusion adjustments or urgent clinical coordination.
`99090`	Analysis of clinical data stored in a computer, remote evaluation	Used for documented remote monitoring or review of infusion device data and clinical parameters as part of care coordination.