No policy of sickness and accident insurance delivered or issued for deliverance after August 6, 1968, to any person in this state, including both individual policies and group policies, which provide coverage for tuberculosis or mental illness or any other illness, shall exclude hospitalization benefits for such patients hospitalized in tax-supported institutions of the State of Mississippi or any county or municipality thereof, whether such institution be deemed charitable or otherwise. However, only that portion or percent of the benefits shall be payable that have been assigned to said eleemosynary institution as payment in whole or in part for services rendered by such institution.