Improving Mental Health and Drug Treatment Act of 2023

Improving Mental Health and Drug Treatment Act of 2023 This bill permanently allows state Medicaid programs to receive federal payment for substance-use disorder services that are provided at institutions for mental diseases (IMDs) for individuals aged 21 to 64. The bill also extends the maximum length of stay over a 12-month period from 30 days to 45 days and requires state Medicaid programs to review IMD compliance with relevant standards of care.