(1) A corporation holding a certificate of authority under this chapter may enter into contracts with: Licensed hospitals;
(2) Physicians and surgeons licensed to practice in this state;
(3) Licensed nursing homes;
(4) Visiting nurse associations; and
(5) Any hospital maintained and operated by the state or any political subdivision thereof or operated by any corporation, association, or individual.
(6) The contracts by any corporation holding a certificate of authority under this chapter with licensed hospitals, with physicians and surgeons duly licensed to practice in this state, with licensed nursing homes, with visiting nurse associations, and with any hospital maintained and operated by the state or any political subdivision thereof or with any corporation, association, or individual shall be filed with the Insurance Commissioner.