42 C.F.R. § 436.220
Individuals who would meet the income and resource requirements under AFDC if child care costs were paid from earnings
(a) The agency may provide Medicaid to any group or groups of individuals specified under § 436.201(a)(4), (a)(5), and (a)(6) who would meet the income and resource requirements under the State's AFDC plan if their work-related child care costs were paid from their earnings rather than by a State agency as a service expenditure.
(b) The agency may use this option only if the State's AFDC plan deducts work-related child care costs from income to determine the amount of AFDC.