Peninsula Gastroenterology Medical Group was founded in 1986 with two locations, in Mountain View and Redwood City . Our office specializes in the field of digestive disorders and liver diseases. Our physicians also provide a full array of diagnostic and therapeutic endoscopic services.
Our gastroenterologists are highly trained and experienced physicians who provide the best care for patients suffering from digestive disorders and diseases affecting the health of the gastrointestinal tract. Our caring medical staff takes the time necessary to diagnose and explain the medical treatment options available to patients.
While you are a patient at Atherton Endoscopy Center , our highly competent and professional staff will care for you. Everyone from the receptionist to the physician embraces our philosophy of patient-focused care. Above all, our staff is friendly and concerned for your comfort.
Peninsula Gastroenterology Medical Group physicians have hospital privileges at the following hospitals:
2500 Grant Road
Mountain View, CA 94040
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650-940-7000
www.elcaminohealth.org
170 Alameda De Las Pulgas
Redwood City, CA 94062
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650-369-5811
www.dignityhealth.org/bayarea/locations/sequoia
Dr. Torosis is a native of Montreal, Canada and founded Peninsula Gastroenterology Medical Group in 1986. Dr. Torosis attended medical school and internship at McGill University in Montreal. In 1982 Dr. Torosis moved to California where he completed his internal medicine residency in San Diego. He attended Yale University for his fellowship in Gastroenterology and Liver Diseases.
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Dr. Yang is a native of Taiwan and moved to California after high school. She attended college in Los Angeles and graduated medical school from Northwestern University in Chicago. Dr. Yang moved to the Bay Area for her post-graduate medical training and completed her internal medicine residency at Santa Clara Valley Medical Center.
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Dr. Rengstorff was born and raised in the Bay Area. He attended medical school at Georgetown University School of Medicine and completed his residency at Vanderbilt University Medical Center. He later returned to the Bay Area to complete his fellowship in Gastroenterology at California Pacific Medical Center.
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Dr. Cynthia Leung was born and raised in the Bay Area. She completed both her medical school and internal medicine residency training at Stanford. After completing her Residency, she participated in the Master’s Program for Clinical Epidemiology and received her MS degree in 2006. Dr. Leung then went on to complete her fellowship in Gastroenterology at Stanford University Medical Center.
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Dr. Madhuri Badrinath grew up in India and moved to the U.S. after medical school to complete her residency and fellowship at SUNY Upstate Medical University in New York. She later worked as faculty at Baylor College of Medicine in Texas before moving to California in 2025 to be closer to her family.
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Hoan was born and raised in Vietnam until 2010 when she moved to Southern California. She attended University of California, Irvine and was a part of the National Honor Society of Pre-Health student, AED. She attended the University of Pittsburgh Physician Assistant Program in Pennsylvania where she worked with UPMC and Cleveland Clinic.
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