Mo. Rev. Stat. § 630.645
The department shall provide or shall arrange for follow-up care and aftercare and shall make or arrange for reviews and visits with the client at least quarterly to the residential facility or day program in which the client has been placed to determine whether the client is receiving care, treatment, habilitation and rehabilitation, including medical care, consistent with his needs and condition. The department shall identify the facilities, programs or specialized services operated or funded by the department which shall provide necessary levels of follow-up care, aftercare, habilitation or medical treatment to clients in certain geographic areas where they are placed. After a client has been placed through the placement program, the department shall, for a period of four months following the initial placement, evaluate and review the progress of the client in the placement at least once a month.
§ 630.645, RSMo