Ill. Admin. Code tit. 77, § 240.80
c) The HMO shall develop and implement a process which will enable the HMO to maintain current information regarding each provider site under contract with the HMO, including the following:
e) The HMO's participating physicians, other than those whose scope of practice is limited to radiology, anesthesiology, pathology, or emergency medical services, shall have one of the following:
h) The HMO shall not cancel an enrollee's membership unless the HMO can present documentation verifying that:
4) failure of the enrollee and the primary care physician to establish a satisfactory patient-physician relationship if it is shown that: