Mo. Rev. Stat. § 198.428: Medicaid eligibility presumed pending approval or denial of application, when.

If the family support division is unable to make a determination regarding Medicaid eligibility for a resident within sixty days of the submission of a completed application for medical assistance for nursing facility services, the patient shall be Medicaid eligible until the application is approved or denied. However, in no event shall benefits be construed to commence prior to the date of application.