Mark Kogan, MD

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2089 Vale Rd Ste 33
San Pablo, CA 94806

Mark Kogan, MD, located in San Pablo, CA, is part of Unio Specialty Care Gastroenterology, the largest gastroenterology medical group in California. Specializing in state-of-the-art medical diagnosis and treatment options for digestive health issues, liver conditions, and various cancers. Their team of expert physicians is dedicated to providing high-quality, patient-centered care in a private practice setting.

With a commitment to comprehensive care, Unio Specialty Care Gastroenterology offers a range of services and procedures, including colonoscopies, upper endoscopies, flexible sigmoidoscopies, and capsule endoscopies. Patients can trust in the years of experience and dedication to delivering the highest quality patient care from their team of knowledgeable gastroenterologists.

Patients are encouraged to explore the informative resources on their website covering common topics related to gastroenterology and endoscopic procedures. The practice values convenience, offering multiple locations throughout California and a provider search tool for easy access to care. Unio Specialty Care Gastroenterology aims to empower patients to make informed decisions about their digestive health for improved well-being.

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Reviews

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4.026 reviews
Photo of Winston L.
Winston L.
9/3/2025

I had the hardest time getting a personal reference for a colonoscopy, so as a last ditch attempt, I tried Yelp. I'm so glad I did, since I found Dr. Kogan. There was an initial visit to talk...

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Octavio G.
11/25/2025

Was referred to this office by my doctor and they asked if I seen another GI before they denied me service because they claim they don't see patients for 2nd opinions. They made that determination...

Kathy M.
10/15/2025

Dr.Kogan has been mine and Husbands GI Special Doctor for Many Years . He's the best doctor ever so knowledgeable , Kind, Patient . His Two Gals in Front Desk Carla and Bianca are so friendly and...

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Janet B.
5/5/2025

Dr. Kogan was fine for the exam. His staff messed up scheduling a procedure TWO separate times. They miscommunicate, leave vague messages, and their record keeping system doesn't reflect...

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Reba Jane S.
6/22/2018

We've had only one visit so far, but I was impressed. The communication is state of the art and they do like to stay in touch. I would recommend signing up on the Patient Portal for all your...

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