HCPCS Level II J1942: Injection, Aripiprazole Lauroxil, 1 mg

HCPCS Level II code J1942 identifies a single milligram unit of aripiprazole lauroxil for injection, a long-acting antipsychotic used in treatment of schizophrenia and related disorders. Nationally, this code matters because it standardizes billing for a specialty injectable medication administered in outpatient and behavioral health settings, affecting payer policy, site-of-care billing, and medication access.

Key payers covered in this analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise overview of what J1942 represents clinically and operationally, typical sites of service, and which major payers’ policies and coverage practices are relevant. The publication outlines common benchmarking topics such as unit-based billing mechanics for injectable agents, potential impacts on outpatient clinic workflows, and considerations for payer medical necessity and prior authorization processes.

The report also summarizes where to look for related policy updates, how J1942 interacts with service-line billing for behavioral health and psychiatric care, and which clinical and administrative stakeholders should be aware of variations in coverage. Data not available in the input is noted where applicable; the focus remains on national-level implications for billing, coverage, and clinical use of aripiprazole lauroxil injectable therapy.

Billing Code Overview

HCPCS Level II code J1942 represents injection, aripiprazole lauroxil, 1 mg. This code describes a single unit dose of the long-acting injectable antipsychotic aripiprazole lauroxil administered by injection.

Service type: Intramuscular or subcutaneous long-acting antipsychotic injection
Typical site of service: Outpatient clinic, behavioral health clinic, community mental health center, or physician office

Data not available in the input.

Clinical Context

A typical patient is an adult with schizophrenia or schizoaffective disorder receiving long-acting injectable antipsychotic therapy. The patient presents to an outpatient behavioral health clinic or infusion center for a scheduled administration of J1942 (aripiprazole lauroxil), dosed based on the product strength ordered. Nursing staff confirm identity, review allergies and recent clinical status, assess injection site, and document last oral antipsychotic use and any recent adverse effects. The injection is administered intramuscularly (gluteal or deltoid) following manufacturer guidance and clinic protocols. Post-injection observation for 15–30 minutes is typical to monitor for acute reactions. Documentation includes product name, lot number, NDC, dose, route, site, patient tolerance, and clinician signature. Billing uses J1942 per milligram unit reported according to the syringe strength dispensed and institutional billing rules. Typical sites of service are outpatient behavioral health clinics, psychiatric partial hospitalization programs, community mental health centers, and hospital outpatient departments.

Coding Specifications

Modifier	Description	When to Use
`25`	Significant, separately identifiable evaluation and management service by the same physician on the same day	Use when an E/M visit is provided on the same day as the injection and meets documentation requirements.

Taxonomy Code	Specialty	Notes
`207P00000X`	Psychiatry & Neurology - Adult Psychiatry	Psychiatrists commonly prescribe and oversee long-acting antipsychotic injections.
`2084P0800X`	Behavioral Health & Social Service Providers - Psychiatric Nurse Practitioner	Psychiatric NPs frequently administer and manage LAI antipsychotic therapy in outpatient clinics.
`282N00000X`	Nursing - Registered Nurse	RNs perform the intramuscular injection, counseling, and post-injection monitoring.
`207L00000X`	Psychiatry & Neurology - Child and Adolescent Psychiatry	Child/adolescent psychiatrists may manage LAI therapy for adolescents when indicated.
`163W00000X`	Allied Health - Clinical Pharmacist	Pharmacists prepare, verify dosing, and provide medication counseling and prior authorization support.

Related Diagnoses

ICD-10 Code	Description	Clinical Relevance
`F20.9`	Schizophrenia, unspecified	Common indication for long-acting injectable aripiprazole formulations to improve adherence and prevent relapse.
`F25.9`	Schizoaffective disorder, unspecified	Long-acting antipsychotics may be used for mood-stabilizing antipsychotic therapy in schizoaffective presentations.
`F29`	Unspecified psychosis not due to a substance or known physiological condition	LAI antipsychotics are used when persistent psychotic symptoms require maintenance therapy.
`F32.9`	Major depressive disorder, single episode, unspecified	In select cases with psychotic features or augmentation strategies, antipsychotics may be part of treatment plan; documentation required.
`F33.9`	Major depressive disorder, recurrent, unspecified	As above, when antipsychotic augmentation or maintenance is indicated.

Related CPT Codes

CPT Code	Description	Relationship to This Procedure
`96372`	Therapeutic, prophylactic, or diagnostic injection (specify substance or drug); subcutaneous or intramuscular	Commonly billed when an office-based intramuscular medication such as aripiprazole lauroxil is administered; documents the administration service separate from the drug reimbursement billed with `J1942`.
`99213`	Office or other outpatient visit for the evaluation and management of an established patient, typically 15 minutes	Often used for routine follow-up visits where medication management decisions are made on the same day as the injection. Use `25` modifier if billed with the injection.
`96361`	Intravenous infusion, hydration; initial, 31 minutes to 1 hour	Data not applicable to intramuscular injection but included here only when IV access is required for concurrent therapies — not typical for `J1942`.
`99070`	Supplies and materials (except spectacles), used for treatment, not otherwise specified	Used when billable supplies beyond standard injection kit are provided and separately chargeable.
`90471`	Immunization administration (including percutaneous, intradermal, subcutaneous, or intramuscular injections); one vaccine (single or combination)	Generally not used for psychiatric injectables; included for crosswalks where payors require an administration code category, but `96372` is preferred for therapeutic injections.

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Summary & Overview