Increases Medicaid reimbursement for in-person partial care and intensive outpatient behavioral health and substance use disorder treatment services, and associated transportation services, for adults.

S 668 increases Medicaid reimbursement rates for two specific behavioral health services for adults aged 21+ with severe mental illness or substance use disorders. It raises reimbursement for "partial care" (minimum 20 hours/week) and "intensive outpatient" (minimum 9 hours/week) services by 35%, covering related services like counseling and evaluations. The bill also sets a minimum $10 reimbursement for each one-way Medicaid-covered transportation trip to these providers. These changes apply to all licensed outpatient facilities providing these services to eligible Medicaid beneficiaries starting on the bill's effective date.