Every individual or group hospital or medical expense insurance policy or individual or group hospital or medical service plan contract delivered, issued for delivery or renewed in this state will, when deemed medically necessary by the nonprofit hospital service corporation in accordance with its standard medical management protocols and within the nonprofit hospital service corporation‘s subscriber contractual benefit limits, provide coverage for the services of counselors in mental health licensed pursuant to § 5-63.2-9 and therapists in marriage and family practice licensed pursuant to § 5-63.2-10. In the case of a limited provider network, it shall remain within the sole discretion of the nonprofit hospital service corporation as to which certified counselors in mental health and certified therapists in marriage and family practice with which it shall contract. Nothing contained in this section shall require the nonprofit hospital service corporation to provide coverage other than in conjunction with a related medical illness.