; thus, Medicaid could provide a sustained mechanism to pay for MAT, mental health treatment, and general health care for a large portion of the incarcerated population. 3. Repeal of Medicaid inmate exclusion Section 1905(a) of the Social Security Act ( 42 U.S.C. 1396d(a) ) is amended, in the matter following paragraph (29), by striking such term does not include— and all that follows through who is a patient in an institution for mental diseases. and inserting such term does not include any such payments with respect to care or services for any individual who has not attained 65 years of age and who is a patient in an institution for mental diseases. .