Merit Health River Oaks - MS - Hospital Safety Grade. Health (1 days ago) Merit Health River Oaks. 1030 River Oaks Drive Flowood, MS 39232-9553 Map and Directions. View this hospital's Leapfrog Hospital Survey Results. This Hospital's Grade.Fall 2021 . Show Recent Past Grades. Hospital rooms and medical equipment should be thoroughly cleaned often. Safer hospitals will also keep MRSA patients ....