Edward K Onuma, MD PhD

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100 S Ellsworth Ave Ste 507
San Mateo, CA 94401

Peninsula Gastrointestinal Specialists, located in San Mateo, California, is dedicated to providing comprehensive care for digestive health through a team-based approach. Their board-certified gastroenterologists prioritize patient understanding and informed decision-making, offering tailored treatment options while ensuring continuous follow-up for improved health outcomes.

Led by experienced physicians like Dr. Edward K. Onuma and Dr. Eugene Y. Lee, the practice is committed to high-quality healthcare, evidenced by their impressive adenoma detection rate and the extensive training of their staff. Patient testimonials highlight their professionalism, attentiveness, and the state-of-the-art facilities that contribute to a positive experience during procedures.

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Reviews

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4.08 reviews
cj j.
3/27/2025

Dr onuma provides Exceptional care and follow up and has a very pleasant and efficient office nurse

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Anne S.
9/5/2023

I had my regular screening colonoscopy with Dr. Onuma recently. Everything went well. I was able to reach the office and make an appointment immediately. The office had a pleasant atmosphere and...

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Shannon E.
9/15/2017

Not going into all the medical details as to the reason for my visit, but my medical history requires constant monitoring for future issues, and I found Dr. Onuma to be a really thorough and...

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Nina I.
5/1/2011

Dr. Onuma may be a decent gastroenterologist... but I wouldn't really know. I went to him on a referral from the GP with complaints of stomach pain and suspicion of an ulcer. He took down my...

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K G.
1/17/2014

I met with Dr. Onuma yesterday and had a pleasant experience. When I got to his office I was greeted by his staff. After filling out some paperwork I was escorted to an examination room. A nurse...

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