Summary & Overview
HCPCS G2213: ED Initiation of Medication for Opioid Use Disorder
HCPCS Level II code G2213 documents the initiation of medication for opioid use disorder (OUD) in the emergency department, accompanied by assessment, referral to ongoing care, and arrangements for supportive services. The code reflects a growing emphasis on starting evidence-based treatment at the point of emergency care to reduce overdose risk and connect patients to sustained treatment options. Nationally, emergency-initiated OUD treatment is a priority for public health and payer policy given the burden of opioid-related morbidity and mortality.
Key payers included in this analysis are Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise explanation of what G2213 represents, the clinical context for emergency department initiation of medication-assisted treatment, and the practical implications for billing and care coordination. The publication summarizes typical use cases, payer coverage considerations, and areas where policy updates and coding guidance can affect implementation. It also points to benchmarks and operational topics relevant to emergency clinicians and billing staff.
Data not available in the input for specific associated taxonomies, ICD-10 diagnosis pairings, related codes, or detailed service-line categorizations.
Billing Code Overview
HCPCS Level II code G2213 describes the initiation of medication for the treatment of opioid use disorder in the emergency department setting, including assessment, referral to ongoing care, and arranging access to supportive services. This service represents a bundled encounter focused on beginning medication-assisted treatment (MAT) for opioid use disorder as part of emergency care.
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Service type: Initiation of medication for opioid use disorder with associated assessment, referral, and care coordination
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Typical site of service: Emergency department
Data not available in the input for associated taxonomies, ICD-10 diagnoses, related codes, and service line.
Clinical & Coding Specifications
Clinical Context
A 32-year-old patient presents to the emergency department with acute opioid withdrawal after recent heroin use and expresses interest in treatment. Triage and initial nursing assessment identify autonomic instability, nausea, yawning, diaphoresis, and subjective craving. The emergency physician performs an addiction-focused evaluation, documents recent opioid use history, assesses withdrawal severity (e.g., Clinical Opiate Withdrawal Scale), confirms medical stability, and counsels the patient on options.
After shared decision-making, the clinician initiates buprenorphine in the ED, provides a single observed dose and writes prescriptions for linkage to ongoing medication for opioid use disorder (MOUD). The ED team arranges a warm handoff to a community treatment program or outpatient clinic, coordinates follow-up within 24–72 hours, and documents referrals to supportive services (behavioral health, housing, peer recovery). Nursing and social work involvement, patient education, and medication access coordination (e.g., prior authorization or bridge prescription) are included. Billing includes the primary ED visit code and the add-on code G2213 to report initiation of medication for treatment of opioid use disorder in the ED, reported in addition to the primary procedure/service code.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
11 | Office or other outpatient visit for the evaluation and management of an established patient |