Dr. Gary Tigges was born and raised in Bancroft, Iowa. He earned a Bachelor of Science degree in Exercise Physiology from the University of Iowa in 1988 and a Medical Degree from the University of Iowa College of Medicine in 1992. Dr. Tigges completed his internal medicine residency at the University of Texas-Houston in 1995. He started his private practice at Presbyterian Hospital of Plano in 1995 and founded Plano Internal Medicine in 1996.

Dr. Tigges is board-certified by the American Board of Internal Medicine.

Dr. Tigges has been very active in the medical leadership at Presbyterian Hospital of Plano. He served on the Medical Board from 1999 to 2007 and was elected by his peers as President of the Medical Staff in 2006. He has also served as Chairman of the Department of Medicine, the Bioethics Committee and the Peer Review Committees.

Dr. Tigges has served on councils for the Texas Medical Association, is a member of the Dallas County Medical Society and is on the board of directors for a political action committee of the TMA.

Dr. Tigges' community involvement includes previous board membership of the Wellness Center in Plano, current board member of the Dallas chapter of DIFFA and serves on the benefit committee for American Foundation for AIDS Research (amfAR). He is a member of St. Elizabeth Ann Seton Catholic Church in Plano. He has traveled on medical relief missions to such places as Haiti, Ecuador and Zimbabwe.

Dr. Tigges' hobbies include fitness, photography and world travel.