An Act relative to opioid use disorder treatment and rehabilitation coverage

HD 2059 requires Massachusetts health insurance plans to cover medications for opioid use disorder (like naloxone and buprenorphine) without prior authorization, prescriptions, or cost-sharing (deductibles, copays). It directly affects Commonwealth employees (via group insurance), Medicaid patients, and private insurance holders in Massachusetts. The bill mandates coverage as both a medical benefit (when administered at treatment facilities) and pharmacy benefit, with facilities reimbursed at standard rates to prevent balance billing. It also specifies that cost-sharing may still apply if a plan would lose tax-exempt status under IRS rules.