Dr. Mary Hammack, a well-respected physician, joins us from private practice at Presbyterian Hospital of Dallas. She practices general Internal Medicine, providing medical care for adults of all ages. She has been practicing Internal Medicine since 1995. She attended medical school at the University of Texas Health Sciences Center in San ...Patient Portal‧Meet Dr. Huerta‧Insurance Plans‧Meet Dr. Brown‧Meet Dr. Crawford‧Meet Dr. Tirandaz.