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Dr. Thomas O'Brien, MD is a Doctor primarily located in San Rafael, CA. He has 47 years of experience. His specialties include Gastroenterology. Dr. O'Brien is affiliated with California Pacific Medical Center - Davies Campus, Kaiser Permanente Medical Center San Rafael and San Rafael Medical Center. He speaks English.
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Specialties & Expertise
Dr. Thomas O'Brien has the following 5 areas of expertise, 1 specialty and 2 board certifications.
A gastroenterologist is a specialist in diagnosis and treatment of conditions involving the digestive/gastrointestinal (GI) tract. These doctors are experts on how food moves through the digestive system and is chemically broken down, with nutrients being absorbed and waste excreted. You might see this kind of doctor if you are experiencing any number of stomach issues, some of which might be severe diarrhea, irritable bowel syndrome, hemorrhoids, ulcers, acid reflux, Crohn's disease and more.
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Get the facts about Crohn’s Disease, including how it affects the body, the symptoms it causes, and complications that may arise.
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