No contract between a dental plan of a healthcare entity and a dentist for the provision of services to beneficiaries may require that a dentist provide services to its patients at a fee set by the healthcare entity unless said services are covered services under the applicable subscriber agreement. "Covered services," as used herein, means services reimbursable under the applicable beneficiary agreement, subject to such contractual limitations on beneficiary benefits as may apply, including, for example, deductibles, waiting period, or frequency limitations.
R.I. Gen. Laws § 27-18.8-4