42 CFR § 435.308 - Medically needy coverage of individuals under age 21.
(a) If the agency provides Medicaid to the medically needy, it may provide Medicaid to individuals under age 21 (or, at State option, under age 20, 19, or 18), as specified in paragraph (b) of this section:
(2) Who meet the income and resource requirements of subpart I of this part.
(1) Individuals in foster homes or private institutions for whom a public agency is assuming a full or partial financial responsibility. If the agency covers these individuals, it may also provide Medicaid to individuals placed in foster homes or private institutions by private nonprofit agencies.
(2) Individuals in adoptions subsidized in full or in part by a public agency.
(3) Individuals in nursing facilities when nursing facility services are provided under the plan to individuals within the age group selected under this provision. When the agency covers such individuals, it may also provide Medicaid to individuals in intermediate care facilities for individuals with intellectual disabilities.