MedStar Orthopaedic Institute's Hip and Knee Center at MedStar Union Memorial Hospital is located in the Johnston Professional Building, in Baltimore's Charles Village neighborhood. It is a highly specialized, 3,700 sq. ft. center featuring nine exam rooms, telemedicine capability, and in-suite digital x-ray. Directly opposite the tunnel to Garage A, the Center's convenient location requires limited walking for patients with hip or knee pain.