; or (iv) is entitled to medical assistance under this title and for whom the State is providing a payment or subsidy to an employer for coverage of the individual under a group health plan pursuant to section 1906 or section 1906A (or pursuant to a waiver that provides only comparable benefits). (2) 1903A enrollee category The term 1903A enrollee category means each of the following: (A) Elderly A category of 1903A enrollees who are 65 years of age or older. (B) Blind and disabled A category of 1903A enrollees (not described in the previous subparagraph) who are eligible for medical assistance under this title on the basis of being blind or disabled. (C) Children A category of 1903A enrollees (not described in a previous subparagraph) who are children under 19 years of age. (D) Expansion enrollees A category of 1903A enrollees (not described in a previous subparagraph) for whom the amounts expended for medical assistance are subject to an increase or change in the Federal medical assistance percentage under subsection (y) or (z)(2), respectively, of section 1905. (E) Other nonelderly, nondisabled, non-expansion adults A category of 1903A enrollees who are not described in any previous subparagraph. (3) Medicaid enrollee The term Medicaid enrollee means, with respect to a State for a month, an individual who is eligible for medical assistance for items or services under this title and enrolled under the State plan (or a waiver of such plan) under this title for the month. (4) Determination of number of 1903A enrollees The number of 1903A enrollees for a State and fiscal year, and, if applicable, for a 1903A enrollee category, is the average monthly number of Medicaid enrollees for such State and fiscal year (and, if applicable, in such category) that are reported through the CMS–64 report under (and subject to audit under) subsection (h). (f) Special payment rules (1) Application in case of research and demonstration projects and other waivers In the case of a State with a waiver of the State plan approved under