Mo. Rev. Stat. § 189.050: Local residency requirement prohibited.

1. Notwithstanding any provision of law to the contrary, no hospital in this state receiving state assistance under the provisions of sections 189.010 to 189.085 shall deny any services and care described in section 189.010 to a prospective patient who is a resident of this state, solely for the reason that the prospective patient* does not reside in the city, county, or hospital district in which the hospital is located.

2. Any hospital which violates the provisions of subsection 1 shall not be entitled to any funds under the provisions of sections 189.010 to 189.085.