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Physician Profile

Mark Kogan, MD

Serving Patients in
San Pablo & Berkeley
Make an Appointment
(510) 234-5012

Recent News

inSite Digestive Health Care is proud to announce its newest location in Lancaster, CA with Dr. Jatinder Pruthi!

About Dr. Mark Kogan

Dr. Mark Kogan received his undergraduate degree and M.D. degrees from Northwestern University as a member of the prestigious Honors Program in Medical Education, earning both degrees in a total of 6 years. After completing his Internal Medicine residency at Cornell University, he completed his Gastroenterology and Hepatology fellowship at the University of Colorado Health Sciences Center in Denver, Colorado.

Dr. Kogan is Board Certified in both Internal Medicine and Gastroenterology. He 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. He has also served as a Regional Medical Director for the Alta Bates Medical Group and sat on the clinical practice committee for the American Gastroenterology Association. He is currently 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 as an Adjunct Associate Professor at Touro Osteopathic Medical School. Named one of the top Gastroenterologists in the Bay Area by San Francisco Magazine, “Dr. Kogan is one of 449 superlative Bay Area physicians to help keep your family healthy”.

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.

San Pablo:


Treatment Philosophy

Dr. Kogan believes in providing the highest quality medical care while respecting the dignity of all patients. His goal is to expertly manage the digestive health of his patients, as well as to provide education and address any concerns.

Dr. Kogan enjoys all aspects of consultative and therapeutic gastroenterology. Colon cancer screening and inflammatory bowel disease are areas of special interest to him. Becker’s GI & Endoscopy has named Dr. Kogan as “GI physician leader to know!”

Specialties and Services

Gastrointestinal Endoscopy (Colonoscopy, Upper Endoscopy, Capsule Endoscopy)

Colon Cancer Screening




Peg Placement, replacement and removal

General Hepatology

Non-Surgical Treatment of Hemorrhoids

Professional Affiliations

American College of Physicians

American Society for Gastrointestinal Endoscopy

American Gastroenterological Association

California Medical Association

Alameda Contra-Costa Medical Association

Northern California Society for Clinical Gastroenterology

American Medical Association

Office Location

San Pablo Offices
2089 Vale Rd., Suite 33
San Pablo, CA 94806
Phone: (510) 234-5012

Berkeley Office
2999 Regent Street, Suite 201
Berkeley, CA 94705
Phone: (510) 234-5012

Professional Publications

Kogan, M.H., Hammond, D.D.; and Vierling, J.M. Defects in proliferation and immunoglobulin secretion to autologous stimuli in chronic liver disease. Hepatology, 5, 1039, 1985. Presented at the 36th Annual Meeting of the American Association for the Study of Liver Diseases, November 5, 1985

Kogan, M.H., Hammond, D.D.; and Vierling, J.M. T Cell proliferation an immunoglobulin secretion to allogeneic stimuli in primary biliary cirrhosis. Hepatology, 6, 1228, 1986

Kogan, M.H., Hammond, D.D.; and Vierling, J.M. Proliferation an immunoglobulin secretion to autologous stimuli in siblings of patients with primary biliary cirrhosis. Gastroenterology, 92, 1744, 1987