Summary & Overview
HCPCS M1380: Antipsychotic Medication Fill — Two or More Prescriptions
HCPCS Level II code M1380 indicates that a beneficiary filled at least two prescriptions during the performance period for qualifying oral or long-acting injectable antipsychotic medications. This measure is used to capture medication fills as a proxy for adherence or persistence in antipsychotic treatment, which has implications for behavioral health outcomes and utilization. Nationally, consistent measurement of antipsychotic fills supports quality monitoring, care coordination, and program evaluation across payers.
Key payers covered in this analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find an overview of what the code represents, typical sites of service, and the clinical relevance of documenting multiple antipsychotic fills. The publication outlines common modifiers and practical billing considerations, describes the normative context for medication-fill measures, and highlights areas where policy updates or payer-specific rules can affect reporting. It also offers benchmarks and summary-level guidance on interpretation where available and notes when input data are not provided. The content is targeted to billing staff, compliance officers, and clinical program managers seeking a concise reference on HCPCS Level II code M1380 and its role in medication-fill measurement.
Billing Code Overview
HCPCS Level II code M1380 documents that a patient filled at least two prescriptions during the performance period for any combination of qualifying oral antipsychotic medications or long-acting injectable antipsychotic medications listed under the denominator note. This code captures medication adherence or persistence with antipsychotic therapy over the specified performance period.
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Service type: Pharmacy-dispensed antipsychotic medication fills
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Typical site of service: Outpatient pharmacy or community-based medication administration (including clinics administering long-acting injectables)
Clinical & Coding Specifications
Clinical Context
A 28-year-old patient with a diagnosis of schizophrenia presents for routine outpatient psychiatric follow-up at a community mental health clinic. The patient has been prescribed an oral antipsychotic and, during the performance period, the pharmacy records show the patient filled at least two prescriptions for qualifying oral antipsychotic medications. The care team documents medication adherence counseling, monitors for adverse effects (weight, metabolic labs, EPS), and coordinates with the pharmacy to confirm fills. Typical workflow includes medication reconciliation during the visit, verification of prescription fills via pharmacy benefit manager or state prescription monitoring where available, updating the medication list in the electronic health record, and scheduling follow-up or long-acting injectable administration if indicated. Service type is medication adherence tracking/monitoring and pharmacy claim verification. Typical site of service is outpatient behavioral health clinic, ambulatory psychiatric clinic, primary care clinic with behavioral health integration, or pharmacy-managed medication therapy management encounters.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
22 | Increased procedural services | Rarely used; report when work or resources for medication management documentation are substantially greater than usual. |