(1) If a carrier approves a health care provider's credentialing application, upon completion of the credentialing process, the carrier must reimburse a health care provider under the following circumstances:

(a) When credentialing a new health care provider through a new provider contract, the carrier must reimburse the health care provider for covered services provided to the carrier's enrollee retroactively to the date of contract effectiveness if the credentialing process extends beyond the effective date of the new contract.

(b) When credentialing a provider to be added to an approved and in-use provider contract where a relationship existed between the carrier and the health care provider or the entity for whom the health care provider is employed or engaged at the time the health care provider submitted the completed credentialing application, the carrier must reimburse the health care provider for covered health care services provided to the carrier's enrollees during the credentialing process beginning when the health care provider submitted a completed credentialing application to the carrier.

(2) The health carrier must reimburse the health care provider at the contracted rate for the applicable health benefit plan that the health care provider would have been paid at the time the services were provided if the health care provider were fully credentialed by the carrier.

(3) Nothing in this section requires reimbursement of health care provider-rendered services that are not benefits or services covered by the health carrier's health benefit plan.

(4) Nothing in this section requires a health carrier to pay reimbursement for any covered medical services provided by a health care provider applicant if the health care provider's credentialing application is not approved or if the carrier and health care provider do not enter into a contractual relationship.