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...
Mark Kogan, MD
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(28)
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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
4.0(28)
David L.
1/14/2026
Very poor communication When you have to copy and resend a message 4 times, it is a sign to find another physician Even then a phone call was needed and they say they don't discuss test results
Ann E.
1/22/2026
Very good gastroenterologist. Good listener. Thorough responses to my questions. No rushing through the appointment. I was very pleased to be referred to this doctor.
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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