HCPCS Level II J3379: Valproate Sodium Injection, 5 mg

HCPCS Level II code J3379 denotes a 5 mg injection of valproate sodium, an intravenous or intramuscular formulation of an established anticonvulsant and mood-stabilizing medication. Nationally, accurate coding for injectable valproate matters for inpatient and acute outpatient care, emergency management of seizures, and billing consistency for antiepileptic therapies. Proper use of J3379 supports clinical documentation alignment and payer adjudication for injectable medication administration.

Key payers covered in this analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find an overview of coding context and clinical application, summaries of payer coverage considerations where available, benchmarking of common reimbursement and billing practice themes, and important billing and policy updates that affect injectable antiepileptic drugs. The publication also outlines typical sites of service and service line implications for hospital and emergency care settings. Data not available in the input will be noted where applicable.

Billing Code Overview

HCPCS Level II code J3379 describes an injection of valproate sodium, 5 mg. This code represents a parenteral anticonvulsant medication delivered by injection for indications where intravenous or intramuscular administration of valproate sodium is clinically appropriate.

Service type: Medication administration (injectable antiepileptic/antimanic therapy)
Typical site of service: Hospital inpatient or outpatient settings, emergency department, or other clinical settings where injectable medication administration occurs

Clinical Context

A typical patient is an adult or adolescent with a seizure disorder, bipolar disorder, or migraine prophylaxis indication who requires parenteral administration of valproate sodium when oral therapy is not feasible (e.g., acute agitation, inability to swallow, perioperative fasting, or severe vomiting). The clinical workflow begins with an evaluation by the treating physician (neurology, psychiatry, or emergency medicine) to confirm the indication for intravenous valproate sodium. Vital signs and relevant labs (serum valproate level if available, liver function tests, and platelets) are reviewed. Nursing prepares the medication per institutional protocol, calculates the required dose based on the ordered milligrams, verifies the J3379 billing unit(s) (each unit = 5 mg), performs medication reconciliation and allergy check, establishes intravenous access, and administers the injection/infusion over the recommended time frame. Post-administration monitoring includes observation for sedation, hypotension, liver-related adverse effects, and neurologic response. Documentation includes indication, dose in mg and units billed, route, administration time, lot number, informed consent if required, and any immediate adverse reactions.

Coding Specifications

Modifier	Description	When to Use
`JW`	Drug amount discarded/not administered to the patient	When a portion of valproate sodium is discarded after opening a single-use vial

Taxonomy Code	Specialty	Notes
`207R00000X`	Neurology	Common prescriber for seizure-related indications
`2084P0800X`	Psychiatry	Prescribes valproate for bipolar disorder management
`164W00000X`	Emergency Medicine	Administers IV therapy for acute seizure or agitation in ED
`363A00000X`	Critical Care Medicine	Manages IV anticonvulsant administration in ICU
`367500000X`	Family Medicine	Manages outpatient or urgent care administrations and transitions of care

Related Diagnoses

ICD-10 Code	Description	Clinical Relevance
`G40.909`	Epilepsy, unspecified, not intractable, without status epilepticus	Common indication for valproate sodium administration for seizure control
`G40.101`	Localization-related (focal) (partial) idiopathic epilepsy and epileptic syndromes with seizures of localized onset, not intractable, with status epilepticus	Used when IV valproate is required for focal seizures or status epilepticus management
`F31.9`	Bipolar disorder, unspecified	Indication for valproate as mood stabilization when parenteral therapy is needed
`G43.709`	Migraine, unspecified, not intractable, with status migrainosus	IV valproate may be used for refractory migraine requiring parenteral therapy
`R56.9`	Unspecified convulsions	Symptom code used in acute settings when IV anticonvulsant therapy is administered

Related CPT Codes

CPT Code	Description	Relationship to This Procedure
`96365`	Intravenous infusion, initial, for therapy, prophylaxis, or diagnosis; up to 1 hour	Used when valproate sodium is administered as an initial IV infusion lasting up to 1 hour
`96366`	Intravenous infusion, each additional hour (List separately in addition to code for primary infusion)	Billed when infusion of valproate sodium continues beyond the first hour
`96374`	Therapeutic, prophylactic, or diagnostic injection (specify substance or drug); intravenous push, single or initial substance/drug	Applicable when valproate sodium is given as an IV push
`96372`	Therapeutic, prophylactic, or diagnostic injection (specify substance or drug); subcutaneous or intramuscular	Relevant if valproate sodium is administered IM in rare circumstances per site protocol
`99223`	Initial hospital care, per day, for the evaluation and management of a patient, which requires a comprehensive history and examination and medical decision making of high complexity	May be billed by the admitting physician when an inpatient admission includes initiation of IV valproate therapy
`99283`	Emergency department visit for the evaluation and management of a patient, which requires medical decision making of moderate complexity	Commonly billed in the ED when patients receive IV valproate for acute seizures or severe agitation

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Summary & Overview