Mark Kogan, MD
Practice: Unio Specialty Care
Specialty: Gastroenterology
Office locations: San Pablo, Berkeley
Dr. Mark Kogan, M.D. received his undergraduate and MD degrees from Northwestern University. After completing his Internal Medicine residency at Cornell University, he went on to complete his Gastroenterology and Hepatology fellowship at the University of Colorado Health Sciences Center. Dr. Kogan has been practicing in the Bay Area since 1987 and has been exhaustively involved in the medical community in numerous leadership roles.
Dr. Mark Kogan, M.D. received his undergraduate and MD degrees from Northwestern University. After completing his Internal Medicine residency at Cornell University, he went on to complete his Gastroenterology and Hepatology fellowship at the University of Colorado Health Sciences Center. Dr. Kogan has been practicing in the Bay Area since 1987 and has been exhaustively involved in the medical community in numerous leadership roles.
GI-San Pablo
Suite 33
San Pablo, CA 94806
GI-Berkeley
Suite 701
Berkeley, CA 94705
Dr. Mark Kogan, M.D. received his undergraduate and MD degrees from Northwestern University. As a member of the prestigious Honors Program in Medical Education, he earned both degrees in a total of 6 years. After completing his Internal Medicine residency at Cornell University, he went on to complete his Gastroenterology and Hepatology fellowship at the University of Colorado Health Sciences Center in Denver, Colorado.
Dr. Kogan has been practicing in the Bay Area since 1987 and has been exhaustively involved in the medical community in numerous leadership roles. He has served as Chief of Staff at Doctors Medical Center and as President of the Alameda Contra Costa Medical Association, and as Chief of Gastroenterology at Alta Bates Summit Medical Center. Additionally, he has served as a Regional Medical Director for the Alta Bates Medical Group as well as sat on the clinical practice committee for the American Gastroenterology Association. Currently, he is a member of the California delegation to the American Medical Association and serves on the Board of Trustees of the California Medical Association. He also has had teaching appointments at UCSF School of Medicine as Assistant Clinical Professor and an Adjunct Associate Professor at Touro Osteopathic Medical School. He has been named one of the top Gastroenterologists in the Bay Area by San Francisco Magazine for 2016, 2017, and 2018.
A native of Chicago, Dr. Kogan enjoys spending time with his family. He also enjoys the natural beauty of the Bay Area and spends his free time hiking, skiing, and golfing.

My husband and I both have been going to see Dr Kogan for many years. He is the very BEST to say the least. He’s professional extremely knowledgeable and explains things to make you understand gives you options and puts you at ease every time we go to see him. He’s genuinely cares about his patients he has a way of making you feel that he will do his absolute BEST for you and reassures you that he is there to help you. He is that Dr that makes a difference for those who go to him for his professional help and you feel comfortable in talking with him and I might add he’s got a great sense of humor always puts a smile on our face. One if the greatest attributes about Dr Kogan is he truly cares about his patients we feel very blessed to have him whenever we need his help. And that is a value that is irreplaceable. Dr Kogan is a great asset to the Unio team.
Great experience. Warm, caring doctor who has great communication skills. I knew I was in good hands!
The best!!!
Top gi docter in the bay area period.
Excellent listener with honestly helpful suggestions. Clear presentation and analysis of the test results. Next steps were clearly detailed. Not rushed at all. Engaged actively in our conversation with open acceptance of my questions and ideas and worries. Top notch doctor.
Dr. Kogan is a great Dr. He is easy to talk to and is a great listener. He hears your concerns and works with you for a resolution.
Dr Kogan is highly experienced and has excellent bedside manner. He is very kind, listened to my concerns, asked questions and was very engaged. I felt very comfortable during the visit and felt my concerns were properly addressed. Thank you Dr Kogan!
Dr Kogan is a very caring compassionate doctor
No, wait very Accommodating. And listens, it makes you feel comfortable
Very attentive & professional.