Tucson’s Top Doctors

Bryan Contreras MD was born and raised in California. He received his Medical degree from the University of Southern California. He completed his residency at the University of California San Diego Medical Center and his fellowship in gastroenterology at the University of California Irvine Medical Center.

Dr Contreras has been practicing medicine since 2003. Board Certified in Gastroenterology. His clinical interest include; research studies, Radiofrequency ablation for treatment of Barrett’s and Interstim therapy for the treatment of incontinence.

His hobbies include; spending time with his children, collecting muscle cars, and practicing Brazilian Jiu Jitsu.

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Leon Tsai MD was born in Taipei, Taiwan and raised in New Orleans, Louisiana . He has an undergraduate in education with a Bachelor’s degree in Microbiology from Louisiana State University and French Language Studies from the Institute Des Etudiants Estrangers Paul Valery Montpellier III, France.   Dr. Tsai earned his medical degree from Louisiana State University School of Medicine. He completed his residency in a combined program of Internal Medicine, and Pediatrics from 1984 to 1988. He was an Area Peace Corps Medical Officer stationed in the city of Dakar, Senegal, in West Africa for Peace Corps volunteer from 1995 – 1997. His fellowship in gastroenterology was completed from Louisiana State University Medical Center in 2002.

Dr Tsai is Board Certified in Gastroenterology. He has practice in Tucson for 2002. His clinical interest include hemorrhoid treatment.

He lives in Tucson with his family. He enjoys reading, playing the Ukulele, dancing the Argentina tango, cooking and relaxing at home and outdoors with his wife and daughter.

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Pat Dinning, MD was born and raised in south central Kentucky. He received his medical degree from the University of Kentucky, College of Medicine. His residency and fellowship were done at the University of Arizona College of Medicine where he was Chief Resident in Internal Medicine from 1994-1995.

Dr Dinning is board certified in Gastroenterology. His clinical interest includes Liver and Pancreas Disease, Upper GI Diseases and General Gastroenterology.

Dr Dinning lives in Tucson with his family. He and his family are active in mission work. The family spend vacation time building houses for the poor. His hobbies include sports, cars, and farming.

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