R.I. Gen. Laws § 27-41-54: Disassociation prohibited.

Notwithstanding any provision of the general or public laws to the contrary, no individual or group health insurance contract, plan, or policy delivered, issued for delivery, or renewed in this state that provides medical coverage for physician services in a physician’s office, and no policy that provides major medical or similar comprehensive-type coverage for specified diseases or other supplemental policies, shall prohibit a medical provider from ceasing an association with and participation in one health maintenance organization and associating and participating with another health maintenance organization doing business in this state.