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 a Distinguished provider by MediFind in the treatment of Irritable Bowel Syndrome (IBS). 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 Irritable Bowel Syndrome (IBS). Her top areas of expertise are Familial Adenomatous Polyposis, Gastric Dysmotility, Indigestion, Portal Hypertension, and Colonoscopy.

Leila Neshatian is a Gastroenterologist in Redwood City, California. Dr. Neshatian is rated as a Distinguished provider by MediFind in the treatment of Irritable Bowel Syndrome (IBS). Her top areas of expertise are Bowel Incontinence, Irritable Bowel Syndrome (IBS), Neurogenic Bowel, Endoscopy, and Colonoscopy.

Brett Wolff is a primary care provider, practicing in Internal Medicine in San Carlos, California. Dr. Wolff is rated as an Experienced provider by MediFind in the treatment of Irritable Bowel Syndrome (IBS). His top areas of expertise are Glucocorticoid-Remediable Aldosteronism, Familial Hypertension, Hypertension, and Hypothyroidism.

Haleh Sheikholeslami is a primary care provider, practicing in Integrative Medicine in San Carlos, California. Dr. Sheikholeslami is rated as an Experienced provider by MediFind in the treatment of Irritable Bowel Syndrome (IBS). Her top areas of expertise are Irritable Bowel Syndrome (IBS), Bowel Incontinence, and Obesity in Children.

Linda Nguyen is a Gastroenterologist in Stanford, California. Dr. Nguyen is rated as a Distinguished provider by MediFind in the treatment of Irritable Bowel Syndrome (IBS). Her top areas of expertise are Irritable Bowel Syndrome (IBS), Gastroparesis, Intestinal Pseudo-Obstruction, Gastric Dysmotility, and Colonoscopy.

Paul Jemelian is a primary care provider, practicing in Internal Medicine in Menlo Park, California. Dr. Jemelian is rated as an Experienced provider by MediFind in the treatment of Irritable Bowel Syndrome (IBS). His top areas of expertise are Bronchiectasis, Bronchitis, RUNX1 Familial Platelet Disorder, and Paris-Trousseau Thrombocytopenia.

Brooke Gurland is a General Surgeon in Palo Alto, California. Dr. Gurland is rated as an Experienced provider by MediFind in the treatment of Irritable Bowel Syndrome (IBS). Her top areas of expertise are Rectal Prolapse, Bowel Incontinence, Levator Syndrome, Pelvic Laparoscopy, and Sacral Nerve Stimulation.

Mythili Pathipati is a Gastroenterologist in Palo Alto, California. Dr. Pathipati is rated as an Advanced provider by MediFind in the treatment of Irritable Bowel Syndrome (IBS). Her top areas of expertise are Irritable Bowel Syndrome (IBS), Colonic Malakoplakia, and Colonoscopy. Dr. Pathipati is currently accepting new patients.

Jennifer Roost is a Gastroenterologist in Palo Alto, California. Dr. Roost is rated as an Advanced provider by MediFind in the treatment of Irritable Bowel Syndrome (IBS). Her top areas of expertise are Familial Adenomatous Polyposis, Turcot Syndrome, Gardner Syndrome, Irritable Bowel Syndrome (IBS), and Colonoscopy. Dr. Roost is currently accepting new patients.

Irene Sonu is a Gastroenterologist in Redwood City, California. Dr. Sonu is rated as an Advanced provider by MediFind in the treatment of Irritable Bowel Syndrome (IBS). Her top areas of expertise are Gastroparesis, Gastroesophageal Reflux Disease (GERD), Gastric Dysmotility, Endoscopy, and Colonoscopy.

Atul Shah is a Gastroenterologist in Redwood City, California. Dr. Shah is rated as an Advanced provider by MediFind in the treatment of Irritable Bowel Syndrome (IBS). His top areas of expertise are Hiatal Hernia, Congenital Diaphragmatic Hernia, Diverticular Disease, Endoscopy, and Gastrectomy.

Laren Becker is a Gastroenterologist in Redwood City, California. Dr. Becker is rated as an Advanced provider by MediFind in the treatment of Irritable Bowel Syndrome (IBS). His top areas of expertise are Irritable Bowel Syndrome (IBS), Bowel Incontinence, Viral Gastroenteritis, Endoscopy, and Tissue Biopsy.

David Goldenberg is a Gastroenterologist in Redwood City, California. Dr. Goldenberg is rated as an Advanced provider by MediFind in the treatment of Irritable Bowel Syndrome (IBS). His top areas of expertise are Bacterial Gastroenteritis, Necrotizing Enterocolitis, Pseudomembranous Colitis, Gastrectomy, and Endoscopy.

Kian Keyashian is a Gastroenterologist in Redwood City, California. Dr. Keyashian is rated as an Advanced provider by MediFind in the treatment of Irritable Bowel Syndrome (IBS). His top areas of expertise are Viral Gastroenteritis, Crohn's Disease, Colitis, Endoscopy, and Colonoscopy.

Damanpreet Grewal is a Gastroenterologist in Redwood City, California. Dr. Grewal has been practicing medicine for over 17 years and is rated as an Advanced provider by MediFind in the treatment of Irritable Bowel Syndrome (IBS). Her top areas of expertise are Gas Bloat Syndrome, Bowel Incontinence, Irritable Bowel Syndrome (IBS), Endoscopy, and Colonoscopy.

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 Irritable Bowel Syndrome (IBS). His top areas of expertise are Diarrhea, Trichohepatoenteric Syndrome, Indigestion, Endoscopy, and Gastrectomy.

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 Irritable Bowel Syndrome (IBS). His top areas of expertise are Ulcerative Colitis, Diverticular Disease, Familial Adenomatous Polyposis, Colonoscopy, and Gastrectomy.

Andrea Portocarrero is a Gastroenterologist in Redwood City, California. Dr. Portocarrero is rated as an Advanced provider by MediFind in the treatment of Irritable Bowel Syndrome (IBS). Her top areas of expertise are Irritable Bowel Syndrome (IBS), Tenesmus, Gas Bloat Syndrome, Viral Gastroenteritis, and Endoscopy.

Anna Yan is a primary care provider, practicing in Internal Medicine in San Carlos, California. Dr. Yan is rated as an Experienced provider by MediFind in the treatment of Irritable Bowel Syndrome (IBS). Her top areas of expertise are Diabetic Hyperglycemic Hyperosmolar Syndrome, Type 2 Diabetes (T2D), Coronary Artery Spasm, and Prinzmetal's Variant Angina.