ENROLLMENT OF INDIVIDUALS UNDER GROUP HEALTH PLANS
(1) may implement guidelines established by the Secretary, consistent with subsection (b), to identify those cases in which enrollment of an individual otherwise entitled to medical assistance under this title in a group health plan (in which the individual is otherwise eligible to be enrolled) is cost-effective (as defined in subsection (e)(2));
(2) may require, in case of an individual so identified and as a condition of the individual being or remaining eligible for medical assistance under this title and subject to subsection (b)(2), notwithstanding any other provision of this title, that the individual (or in the case of a child, the child’s parent) apply for enrollment in the group health plan; and
(3) in the case of such enrollment (except as provided in subsection (c)(1)(B)), shall provide for payment of all enrollee premiums for such enrollment and all deductibles, coinsurance, and other cost-sharing obligations for items and services otherwise covered under the State plan under this title (exceeding the amount otherwise permitted under section 1916), and shall treat coverage under the group health plan as a third party liability (under section 1902(a)(25)).
(b)(1) In establishing guidelines under subsection (a)(1), the Secretary shall take into account that an individual may only be eligible to enroll in group health plans at limited times and only if other individuals (not entitled to medical assistance under the plan) are also enrolled in the plan simultaneously.
(2) If a parent of a child fails to enroll the child in a group health plan in accordance with subsection (a)(2), such failure shall not affect the child’s eligibility for benefits under this title.
(c)(1)(A) In the case of payments of premiums, deductibles, coinsurance, and other cost-sharing obligations under this section shall be considered, for purposes of section 1903(a), to be payments for medical assistance.
(B) If all members of a family are not eligible for medical assistance under this title and enrollment of the members so eligible in a group health plan is not possible without also enrolling members not so eligible—
(i) payment of premiums for enrollment of such other members shall be treated as payments for medical assistance for eligible individuals, if it would be cost-effective (taking into account payment of all such premiums), but
(ii) payment of deductibles, coinsurance, and other cost-sharing obligations for such other members shall not be treated as payments for medical assistance for eligible individuals.
(2) The fact that an individual is enrolled in a group health plan under this section shall not change the individual’s eligibility for benefits under the State plan, except insofar as section 1902(a)(25) provides that payment for such benefits shall first be made by such plan.
(e) In this section:
(1) The term “group health plan” has the meaning given such term in section 5000(b)(1) of the Internal Revenue Code of 1986, and includes the provision of continuation coverage by such a plan pursuant to title XXII of the Public Health Service Act, section 4980B of the Internal Revenue Code of 1986, or title VI of the Employee Retirement Income Security Act of 1974.
(2) The term “cost-effective” has the meaning given that term in section 2105(c)(3)(A). means, as established by the Secretary, that the reduction in expenditures under this title with respect to an individual who is enrolled in a group health plan is likely to be greater than the additional expenditures for premiums and cost-sharing required under this section with respect to such enrollment.
 P.L. 105-33, §4741(b)(2); 111 Stat. 523.
 See Vol. II, P.L. 83-591, §5000(b)(1).
 P.L. 78-410, Title XXII, P.L. 83-591, §4980B, and P.L. 93-406, Title VI.