Clinical Context
A typical patient is a 28-year-old adult presenting to an outpatient community behavioral health clinic requesting evaluation for problematic alcohol and/or drug use. The patient reports increasing frequency of binge drinking and occasional nonmedical opioid use, with functional impairment at work. The clinical workflow begins with check-in and brief screening (for example, AUDIT-C or DAST-10). A licensed clinician (licensed clinical social worker, licensed professional counselor, addiction psychiatrist, or certified addiction counselor) conducts a comprehensive H0001 alcohol and/or drug assessment consisting of structured psychosocial history, substance use history (quantity, frequency, route), withdrawal risk assessment, medical and psychiatric comorbidity review, readiness to change assessment, risk behaviors (overdose risk, injection use), and establishment of a preliminary treatment plan and level-of-care recommendation. Documentation includes time spent, assessment instruments used, identified diagnoses, recommended referrals (detox, outpatient therapy, medication-assisted treatment), and consent for treatment. Typical sites of service are outpatient behavioral health clinics, community mental health centers, federally qualified health centers, primary care offices with integrated behavioral health, and substance use disorder treatment programs. The assessment often triggers billing of H0001 for the initial diagnostic evaluation and care planning; follow-up services may include individual therapy, group therapy, or medication management billed under other codes.