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Physician Profile

Mark Tsuchiyose, MD

Serving Patients in
Daly City
Make an Appointment
(650) 756-5000

Recent News

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

About Dr. Mark Tsuchiyose

Dr. Mark Tsuchiyose graduated from USC School of Medicine in 1983 and completed his Internal Medicine residency at Huntington Memorial Hospital in Pasadena, California. He then completed his Gastroenterology fellowship at LAC/USC Medical Center and returned for his Hepatology fellowship at Huntington.

Due to his special training in Holland and Japan, Dr. Tsuchiyose was recruited to his current practice to provide ERCP services in 1989.

During his 25 years of practice, Dr. Tsuchiyose has been an associate clinical professor at the University of California, San Francisco, a Section Chief in the division of Gastroenterology at Seton Medical Center, and Chairman of Medicine over the last four years. He has always been an advocate for private practice and has been president of several IPAs. He is now one of the leaders bringing the SCGA GI model for private practice up to Northern California.

Treatment Philosophy

Dr. Tsuchiyose’s philosophy towards medicine is very simple. The patient always comes first. His sole purpose is to use his training and 25 years of accumulated gastrointestinal experience to help patients. This knowledge has been honed by constantly updating his knowledge-base with modern advancements in the field and also by expanding it with the use of alternative strategies not learned in medical school.

He strongly believes in a balanced approach to life. If you do not see him in the clinic or hospital, you will find him on the golf course, tennis or squash court, ski slope, or somewhere around the world with his family. He also enjoys trying new and international dishes from his travels, as well as in the Bay Area. He can confidently say that he enjoys life and the ability to improve people’s gastrointestinal problems, so they can do the same.

Specialties and Services

Gastrointestinal Endoscopy (Colonoscopy, Upper Endoscopy)

Colon Cancer Screening

Hemorrhoidal Banding


Small Bowel Capsule Endoscopy

Esophageal pH and Impedence

Professional Affiliations

American Gastroenterology Association

American College of Gastroenterology

American Society of Gastrointestinal Endoscopy

San Mateo County Medical Association

California Medical Association

Southern California GI Society

Office Location

Bay Area Office / Daly City
1850 Sullivan Ave., Suite 520
Daly City, CA 94015
Phone: (650) 756-5000