Methodist Diagnostic Center - Southaven. Directions. Methodist Diagnostic Center - Southaven 7400 Airways Blvd. Southaven, MS 38671 662-996-2122. Hours Mon-Fri: 7:30 a.m. - 5 p.m. Access Patient Portal. At this location. Staffed by board-registered radiologists and certified technologists, our state-of-the-art center provides you and your ....