42 CFR §435.136

1. (a)Provide a one-time notice of potential Medicaid eligibility under § 435.135 to all individuals who meet the requirements of § 435.135 (a) or (c) who were not receiving Medicaid as of March 9, 1984; and
2. (b)Establish an annual review system to identify individuals who meet the requirements of § 435.135 (a) or (c) and who lose categorically needy eligibility for Medicaid because of a loss of SSI. States without medically needy programs must send notices of potential eligibility for Medicaid to these individuals for 3 consecutive years following their identification through the annual review system.