An Act relative to opioid use disorder treatment and rehabilitation coverage

This bill (H 4958) requires all health insurance plans in Massachusetts - covering Commonwealth employees, Medicaid recipients, and private insurance policies - to provide full coverage for medications treating opioid use disorder, including opioid antagonists and agonists (like methadone or buprenorphine). It eliminates prior authorization requirements and removes all out-of-pocket costs (deductibles, copays, coinsurance) for these medications, treating them as medically necessary. The coverage applies whether the medication is dispensed by a pharmacy or administered at a treatment facility, with facilities reimbursed at standard rates to prevent balance billing. This directly affects patients seeking opioid use disorder treatment and the insurers/health plans providing their coverage.