(a) The insurer may include any or all of the following managed care provisions to control the cost of a minimum basic benefit policy issued pursuant to this chapter:

(1) An exclusion for services that are not medically necessary;

(2) A procedure for preauthorization by telephone, to be confirmed in writing, by the insurer or its designee of any medical service, the cost of which is anticipated to exceed a minimum threshold, except for services necessary to treat a medical emergency;

(3)

(A) A preferred panel of providers who have entered into written agreements with the insurer to provide services at specified levels of reimbursement.

(B) With the exception of health maintenance organizations, participation in such a preferred panel shall be open to all providers licensed to provide the services to be covered.

(C)

(i) Any such written agreement between a provider and an insurer shall contain a provision under which the parties agree that the insured individual or covered member will have no obligation to make payment for any medical service rendered by the provider that is determined not to be medically necessary.

(ii) However, charges for medically necessary services received by the insured which are not covered by the minimum basic benefit policy shall be considered the responsibility of the insured; and

(4)

(A) A provision under which any insured who obtains medical services from a nonpreferred provider shall receive reimbursement only in the amount that would have been received had services been rendered by a preferred provider, less a differential, if any, in an amount to be approved by the Insurance Commissioner but which may not exceed twenty-five percent (25%).

(B) However, charges for medically necessary services received by the insured which are not covered by the minimum basic benefit policy shall be considered the responsibility of the insured.

(b) Nothing in this chapter shall be construed to prohibit an insurer from including in a minimum basic benefit policy other managed care and cost control provisions which, subject to the approval of the commissioner, have the potential to control costs in a manner which does not result in inequitable treatment of an insured under this chapter.