Mo. Rev. Stat. § 430.250
Any person or persons, firm or firms, corporation or corporations, including an insurance carrier, making any payment to such patient or to his attorneys or heirs or legal representatives as compensation for the injury sustained, after the receipt of such notice in accordance with the requirements of section 430.240, without paying to such hospital the amount of its lien or so much thereof as can be satisfied out of fifty percent of the moneys due to such patient under any final judgment or compromise or settlement agreement after paying the amount of attorneys' liens, federal and Missouri workers' compensation liens, and any prior liens, shall have a period of one year, after such settlement is made known to the hospital, from the date of payment to such patient or his heirs, attorneys or legal representatives, as aforesaid, be and remain liable to such hospital for the amount which such hospital was entitled to receive, as aforesaid, and any such association, corporation or other institution maintaining such hospital may, within such period, enforce its lien by a suit at law against such person or persons, firm or firms, corporation or corporations making any such payment.
§ 430.250, RSMo