Edward Onuma is a Gastroenterologist in San Mateo, California. Dr. Onuma is rated as an Advanced provider by MediFind in the treatment of Congenital Diaphragmatic Hernia. His top areas of expertise are Hemorrhoids, Heartburn, Portal Hypertension, Gastrectomy, and Colonoscopy. Dr. Onuma is currently accepting new patients.

Anne Thai is a Gastroenterologist in Burlingame, California. Dr. Thai is rated as an Experienced provider by MediFind in the treatment of Congenital Diaphragmatic Hernia. Her top areas of expertise are Gastroesophageal Reflux Disease (GERD), Portal Hypertension, Gastrointestinal Bleeding, Endoscopy, and Gastrectomy. Dr. Thai is currently accepting new patients.

Ernest Ribera is a Gastroenterologist in Burlingame, California. Dr. Ribera is rated as an Experienced provider by MediFind in the treatment of Congenital Diaphragmatic Hernia. His top areas of expertise are Non-Alcoholic Fatty Liver Disease, Esophagitis, Barrett Esophagus, Gastroesophageal Reflux Disease (GERD), and Endoscopy. Dr. Ribera is currently accepting new patients.

Our goal is to provide you with personalized medical care using the most current technology to diagnose and treat your medical problems. Emphasis is placed on disease prevention whenever possible. Should you need specialized treatment, a range of diagnostic and therapeutic procedures are available. We will work with your primary care physician to help diagnose, treat, and heal. Dr. Lee is rated as an Experienced provider by MediFind in the treatment of Congenital Diaphragmatic Hernia. His top areas of expertise are Familial Adenomatous Polyposis, Gardner Syndrome, Turcot Syndrome, Endoscopy, and Gastrectomy.

Vino Verghese is a Gastroenterologist in Burlingame, California. Dr. Verghese is rated as an Experienced provider by MediFind in the treatment of Congenital Diaphragmatic Hernia. His top areas of expertise are Swallowing Difficulty, Painful Swallowing, Pancreatic Cancer, Endoscopy, and Pancreatectomy. Dr. Verghese is currently accepting new patients.

Eric Kubat is a General Surgeon in Burlingame, California. Dr. Kubat is rated as an Experienced provider by MediFind in the treatment of Congenital Diaphragmatic Hernia. His top areas of expertise are Hernia, Femoral Hernia, Umbilical Hernia, Endoscopy, and Gallbladder Removal.

Michael Bender is a Gastroenterologist in Burlingame, California. Dr. Bender is rated as an Experienced provider by MediFind in the treatment of Congenital Diaphragmatic Hernia. His top areas of expertise are Hemorrhagic Proctocolitis, Ulcerative Colitis, Hiatal Hernia, Congenital Diaphragmatic Hernia, and Endoscopy.

David Shields is a Gastroenterologist in San Mateo, California. Dr. Shields is rated as an Experienced provider by MediFind in the treatment of Congenital Diaphragmatic Hernia. His top areas of expertise are Familial Adenomatous Polyposis, Turcot Syndrome, Gardner Syndrome, Hemorrhoids, and Gastrectomy.

Gansevoort Dunnington is a Cardiologist and a Thoracic Surgeon in Redwood City, California. Dr. Dunnington is rated as an Experienced provider by MediFind in the treatment of Congenital Diaphragmatic Hernia. His top areas of expertise are Pleuropulmonary Blastoma, Mitral Valve Regurgitation, End-Stage Renal Disease (ESRD), Heart Bypass Surgery, and Heart Valve Repair. Dr. Dunnington is currently accepting new patients.

Hanmin Lee is a Pediatric Surgeon and a Pediatrics provider in San Francisco, California. Dr. Lee is rated as an Experienced provider by MediFind in the treatment of Congenital Diaphragmatic Hernia. His top areas of expertise are Pulmonary Sequestration, Myelomeningocele, Hydrops Fetalis, Fetal Edema, and Endoscopy.

Lan Vu is a Pediatric Surgeon and a Pediatrics provider in San Francisco, California. Dr. Vu is rated as an Experienced provider by MediFind in the treatment of Congenital Diaphragmatic Hernia. Her top areas of expertise are Pulmonary Sequestration, Donnai-Barrow Syndrome, Fryns Syndrome, Gastrostomy, and Appendectomy.

In his free time, Dr. Kao enjoys playing the piano, listening to live music, enjoying the outdoors and traveling to Italy. He and his wife, who were married in her hometown of Padova, Italy, also love to bike, run and enjoy the outdoors. Dr. Roger Kao is fluent in Mandarin Chinese and conversational medical Spanish and Italian. Dr. Kao is rated as an Experienced provider by MediFind in the treatment of Congenital Diaphragmatic Hernia. His top areas of expertise are Gastric Dysmotility, Irritable Bowel Syndrome (IBS), Diarrhea, Gastrectomy, and Endoscopy.

Patients are the customers and owners of their health. Doctors are providers of information, education and personalized services to the patients. While doctors are good sources of opinions and guidance, ultimately all decisions should come from well informed patients. Dr. Yang strongly believes the best medical care is delivered when the doctor is a knowledgeable and compassionate patient advocate which includes providing clear communication, recommending options that have sound scientific basis, and developing action plans that are customized and well organized. It is the patient-centric approach that has served Dr. Yang and her patients well over many years. Dr. Yang is rated as an Experienced provider by MediFind in the treatment of Congenital Diaphragmatic Hernia. Her top areas of expertise are Familial Adenomatous Polyposis, Gastric Dysmotility, Indigestion, Portal Hypertension, and Colonoscopy.

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. In 1986 at the completion of his fellowship, he moved to the Peninsula. Dr. Torosis is rated as an Experienced provider by MediFind in the treatment of Congenital Diaphragmatic Hernia. His top areas of expertise are Ulcerative Colitis, Diverticular Disease, Familial Adenomatous Polyposis, Colonoscopy, and Gastrectomy.

I strongly believe in providing compassionate, thorough and up to date medical treatment for all of my patients. I strive to be a good listener to determine the best diagnostic and therapeutic approach for each patient every time I see them in the office. Our entire team here at Peninsula Gastroenterology Medical Group does our best to ensure your visit will be pleasant and stress free! I look forward to meeting with you. Dr. Rengstorff is rated as an Experienced provider by MediFind in the treatment of Congenital Diaphragmatic Hernia. His top areas of expertise are Diarrhea, Trichohepatoenteric Syndrome, Indigestion, Endoscopy, and Gastrectomy.

Dr. Mark M. Tsuchiyose is a board-certified gastroenterologist with over 35 years of experience treating complex gastrointestinal and liver disorders. He provides personalized, patient-centered care and performs advanced diagnostic and therapeutic endoscopy with a strong emphasis on safety, comfort, and long-term outcomes. His approach blends clinical precision with a deep commitment to understanding each patient’s full health picture.Expanded his clinical model through formal training in functional and holistic medicine since 2014, focusing on root causes of chronic disease.Developed targeted nutritional strategies to support pyloric valve function and help patients reduce bile-related injury and discontinue long-term PPI therapy safely.At CDCH, improves liver health, reducing liver fat in nearly 90% of patients through metabolic and nutrition-focused interventions.Advocates for physician support, community health, and public wellness while helping patients transition away from unnecessary long-term acid suppression.Committed to compassionate, whole-person care. Dr. Tsuchiyose is rated as an Experienced provider by MediFind in the treatment of Congenital Diaphragmatic Hernia. His top areas of expertise are Exocrine Pancreatic Insufficiency, Angiodysplasia of the Colon, Indigestion, Gastrectomy, and Endoscopy.

John Clarke is a Gastroenterologist in Redwood City, California. Dr. Clarke is rated as a Distinguished provider by MediFind in the treatment of Congenital Diaphragmatic Hernia. His top areas of expertise are Achalasia, Painful Swallowing, Swallowing Difficulty, Endoscopy, and Colonoscopy.

Mary Hawn is a General Surgeon in Stanford, California. Dr. Hawn is rated as a Distinguished provider by MediFind in the treatment of Congenital Diaphragmatic Hernia. Her top areas of expertise are Hernia, Hiatal Hernia, Achalasia, Endoscopy, and Gallbladder Removal.

Mimi Lin is a Gastroenterologist in San Francisco, California. Dr. Lin is rated as an Experienced provider by MediFind in the treatment of Congenital Diaphragmatic Hernia. Her top areas of expertise are Encopresis, Gastroparesis, Achalasia, Endoscopy, and Gastrectomy. Dr. Lin is currently accepting new patients.

Virginia Litle is a Thoracic Surgeon in San Francisco, California. Dr. Litle is rated as an Experienced provider by MediFind in the treatment of Congenital Diaphragmatic Hernia. Her top areas of expertise are Lung Nodules, Lung Cancer, Esophageal Cancer, Endoscopy, and Gastric Bypass. Dr. Litle is currently accepting new patients.