Sec. 24. "Participating provider" means a provider who, under an express or implied contract with:
(1) the health maintenance organization; or
(2) a contractor of the health maintenance organization or any subcontractor of a contractor of the health maintenance organization;
has agreed to provide health care services to enrollees with an expectation of directly or indirectly receiving payment, other than copayment or deductible, from the health maintenance organization.