Dr. Brian P. O'connor

I developed an interest in nature and science in the early years of my education.  The field of gastroenterology allows me to apply the basic sciences to positively effect the health and quality of life of my fellow man.I specialize in managing gastrointestinal, liver and pancreaticobiliary disease both in the clinic and hospital setting. I am trained in endoscopy for the diagnosis and treatment of gastrointestinal disease. Dr. Umphress is rated as an Advanced provider by MediFind in the treatment of Visceromegaly. His top areas of expertise are Visceromegaly, Familial Adenomatous Polyposis, Turcot Syndrome, Endoscopy, and Gastrectomy.

Marion Peters is a primary care provider, practicing in Internal Medicine in San Francisco, California. Dr. Peters is rated as a Distinguished provider by MediFind in the treatment of Visceromegaly. Her top areas of expertise are Hepatitis, Hepatitis C, Hepatitis B, Non-Alcoholic Fatty Liver Disease, and Liver Transplant.

Desiree Arretz is a primary care provider, practicing in Internal Medicine in San Francisco, California. Dr. Arretz is rated as an Advanced provider by MediFind in the treatment of Visceromegaly. Her top areas of expertise are Visceromegaly, Cirrhosis, Enlarged Liver, and Maturity Onset Diabetes of the Young.