42 C.F.R. § 435.1001
FFP for administration
(a) FFP is available in the necessary administrative costs the State incurs in—
(1) Determining and redetermining Medicaid eligibility and in providing Medicaid to eligible individuals; and
(2) Administering presumptive eligibility.
(b) Administrative costs include any costs incident to an eye examination or medical examination to determine whether an individual is blind or disabled.