Summary & Overview
HCPCS J1165: Injection, Phenytoin Sodium, 50 mg
HCPCS Level II code J1165 designates a 50 mg unit of injectable phenytoin sodium, an anticonvulsant used for acute seizure management and seizure prophylaxis in various clinical settings. Nationally, accurate coding for parenteral anticonvulsants is important for care continuity, billing accuracy, and tracking utilization of critical acute-care medications.
This brief summarizes payer coverage and practical context for major national payers: Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find an overview of what J1165 represents clinically and operationally, plus the types of benchmarks and policy items typically relevant for injectable drug codes: payer coverage patterns, billing and revenue-line considerations, site-of-service implications, and common modifier usage (reference only; specific modifier guidance is not provided here). The publication also frames clinical contexts in which J1165 is commonly used, such as emergency seizure control and perioperative seizure prophylaxis.
What readers will learn: the clinical meaning and typical settings for J1165, which payers are considered in the analysis, and the categories of benchmarks and policy updates that affect injectable drug billing. Data not available in the input will be identified as such where applicable.
Billing Code Overview
HCPCS Level II code J1165 represents injection, phenytoin sodium, per 50 mg. This code denotes a parenteral anticonvulsant medication administered as an intramuscular or intravenous injection. Service type: injectable medication administration. Typical site of service: hospital inpatient, emergency department, observation unit, or outpatient clinic where injectable anticonvulsant therapy is provided.
Data not available in the input.
Clinical & Coding Specifications
Clinical Context
A 58-year-old male with a history of generalized tonic–clonic seizures is admitted to the emergency department after multiple breakthrough seizures despite oral anticonvulsant therapy. The treating emergency physician and ED nursing staff determine that rapid parenteral administration of an anticonvulsant is required. Intravenous phenytoin sodium is prepared in 50 mg increments for bolus dosing to achieve therapeutic serum concentrations and terminate ongoing seizures. The typical clinical workflow includes assessment of airway and hemodynamics, IV access confirmation, administration of a loading dose of phenytoin sodium (often calculated in mg/kg and given in divided 50 mg increments), continuous cardiac monitoring during and after infusion because of risk of hypotension and arrhythmia, documentation of dose and lot number, and monitoring of serum drug levels and neurologic status. Typical sites of service are the emergency department, inpatient hospital ward, intensive care unit, and occasionally ambulatory infusion centers for specialty administration when indicated.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
00 | No modifier applicable | Rarely used; default when no specific modifier applies |
11 |