215 ILCS 165/25
A health services plan corporation may receive and accept from governmental or private agencies or from other persons as defined in this Act, payments covering all or part of the cost of subscriptions to provide health services for needy and other individuals. However, all contracts for health services concerning persons other than recipients of public aid shall be between the corporation and the person to receive such services. No payments shall be made by the Department of Healthcare and Family Services to any Health Services Plan Corporation except where the payment is made for a covered service included in the Medical Assistance Program at the rate established by the Department of Healthcare and Family Services , and where the service was rendered to a public aid recipient, and where there was in full force and effect, at the time the service was rendered, a written agreement governing such provision of services between such Health Services Plan Corporation and the Department.
215 ILCS 165/25