alth maintenance organizations shall not disenroll any enrollee against his wishes without cause as determined by the Commission, either through public hearings or by regulation. All eligible persons who become enrollees, shall remain enrolled in the health maintenance organization of their choice for a benefit period of one (1) year, with the following exceptions:

(a) An enrollee who changes his residence; or

(b) The health maintenance organization is terminated; or

(c) The enrollee declares his intent to disenroll through the grievance procedure established by the Commission; or

(d) The enrollee declares his intent to voluntarily change HMO’s at a time other than the end of the benefit period, he shall pay a premium; and

(e) An enrollee if he is unwilling or unable to follow the advice of his physician.

SOURCE: GC § 9990.17.