Mo. Rev. Stat. § 189.080
Any high risk patient residing in the state of Missouri who is in need of services because of his* condition, who has been certified by a licensed physician as having a high risk condition and who, as a person, can probably benefit from such services and who is otherwise financially unable to pay for such services shall be entitled to health services without charge to the limit of the appropriations provided for in** sections 189.010 to 189.085. Any high risk patient who, or whose parents, guardian, or other person legally chargeable with the support of the patient, is able to pay a portion but not all of the expenses for the required services for the patient, shall be entitled to the services if the patient or parent, guardian, or other person legally charged with the support of the patient shall pay such portion of the expenses to the hospital and physician as the patient or parent, guardian, or other person legally charged with the support of the patient is reasonably able to pay. Provided, however, that where the patient is eligible, payments will be made for such services through Medicaid, or other insurance benefits available to the patient will be utilized to the fullest extent. The benefits available under these sections shall not replace those provided under other federal or state law or under other contractual or legal entitlements of the persons receiving them. Persons entitled to health services may obtain these from any available provider of services with which an agreement is in effect under this section. The funds made available for the purposes of sections 189.010 to 189.085 shall be disbursed so as to insure full payment for the financially eligible for those conditions of highest risk in accord with priorities to be recommended by the coordinating committee and adopted by the director.
§ 189.080, RSMo