Mo. Rev. Stat. §376.1210(1)

(1) Each entity offering individual and group health insurance policies providing coverage on an expense-incurred basis, individual and group service or indemnity type contracts issued by a nonprofit corporation, individual and group service contracts issued by a health maintenance organization, all self-insured group arrangements to the extent not preempted by federal law, and all managed health care delivery entities of any type or description, that are delivered, issued for delivery, continued or renewed in this state on or after January 1, 1997, and providing for maternity benefits, shall provide coverage for a minimum of forty-eight hours of inpatient care following a vaginal delivery and a minimum of ninety-six hours of inpatient care following a cesarean section for a mother and her newly born child in a hospital as defined in section 197.020 or any other health care facility licensed to provide obstetrical care under the provisions of chapter 197.