Dr. Mary D. Johnston
About Dr. Mary D. Johnston Specialty / Subspecialties: Psychiatry / General Psychiatry, Geriatric Psychiatry, Pain MedicineSUBSPECIALTIES: General Psychiatry, Geriatric Psychiatry, Pain MedicineAFFILIATED HOSPITALS: Johns Hopkins HospitalGENDER: FemaleYEARS OF EXPERIENCE: 21+ Education & Experience Medical School & ResidencyNational University of Ireland, …