JOHNSON CITY -- Holston Medical Group (HMG) announces the newest addition to the HMG Family of Care, HMG Primary Care at Johnson City, 215 E. Watauga Ave. Known for their comprehensive, compassionate care, Dr. Cynthia Partain and Michael Smith, PA will be leading the clinical services at this location. Dr. Partain has been providing primary care to the Johnson City and surrounding communities for over twenty years.