A condition in which continuous exposure to stomach acid causes the cells of the esophagus to undergo changes, Barrett’s esophagus can cause various GI problems including esophageal cancer. For people with GERD, and those suffering from persistent heartburn and other GI symptoms, undergoing regular screening is the best way to guard against cancer and other conditions. However, it’s important to remember that tests and treatments for Barrett’s are only as good as the doctors performing them.
The board-certified GI specialists at La Peer’s Barrett’s Esophagus Center of Excellence possess expert training from the premier medical schools in the country. Further, their work has been featured in national media such as Discovery Health, The Oprah Winfrey Show, The Doctors, The New York Times, People, Entertainment Tonight, The Insider, CNN, ABC News, Fox 11 News, and ELLE magazine among others. If you’re interested in booking an appointment with one of our physicians, feel free to contact us at (888) 548-7614.
Our Team of Doctors
Peyton Berookim, MD, Medical Director
Peyton Berookim, MD is a medical director at the Barrett’s Esophagus Center of Excellence and is board-certified by the American Board of Internal Medicine and Subspecialty Board of Gastroenterolgy. Dr. Berookim’s key areas of interest are colon cancer screening, surveillance, and prevention. As a member of the American College of Gastroenterology and the American College of Physicians, Dr. Berookim has placed special emphasis on continually educating himself on the latest and most advanced procedures and treatments in gastroenterology. He also has his own gastroenterology practice.
Dr. Berookim’s key areas of interest are colon cancer screening, surveillance, and prevention. As a member of the American College of Gastroenterology, the American Gastroenterological Association, the American Society for Gastrointestinal Endoscopy, and the American College of Physicians, Dr. Berookim has placed special emphasis on continually educating himself on the latest and most advanced procedures and treatments in gastroenterology.
Mark Davidson, MD, Medical Director
Mark Davidson, MD is a medical director at the Barrett’s Esophagus Center of Excellence and is board-certified in both gastroenterology and internal medicine. He is an Attending Physician at Cedars Sinai Medical Center and other local hospitals in Los Angeles. His practice focuses on clinical medicine and a variety of endoscopic procedures. Thousands of patients have trusted their medical care to Dr. Davidson for a variety of medical disorders but especially for screening of colon, esophageal, and gastric cancers.
Dr. Davidson received his medical degree from David Geffen School of Medicine at the University of California, Los Angeles (UCLA). He completed a three-year residency program in internal medicine at the UCLA-affiliated Veterans Affairs Medical Center in Los Angeles and finished a three-year fellowship program in Gastroenterology with emphasis on liver disorders at the UCLA-affiliated Kaiser Permanente Medical Center in Los Angeles.
Additionally, Dr. Davidson has his own private gastroenterology and internal medicine practice in Beverly Hills and Los Angeles.
Siamak Tabib, MD
Siamak Tabib, MD is board-certified in Internal Medicine, Gastroenterolgy and Hepatology. Dr. Tabib incorporates both health maintenance and disease prevention in his practice of Gastroenterology and Hepatology. These two specialty fields of medicine deal primarily with conditions of the digestive tract. His goal is to maintain health primarily through disease prevention, and when necessary, to intervene with appropriate state of the art methods.
Payman Khorrami, MD
Payman Khorrami, MD is board-certified in Gastroenterology and Hepatology and has had the additional education to diagnose and treat complex gastrointestinal problems. He has been expertly trained to perform colonoscopies when they are required to determine the cause of a patient’s complaints, and has his own private practice in gastroenterology, liver disorders and nutrition. Dr. Khorrami has appeared on several television and radio talk shows to discuss disorders of the gastrointestinal tract.
Arash Ari Nowain, MD
Arash Ari Nowain, MD, is board-certified in gastroenterology and internal medicine and specializes in medical disorders of the digestive system. Dr. Nowain treats acute and chronic GI problems with a heavy focus on prevention of colon cancer. Dr. Nowain has staff privileges at the Cedars-Sinai Medical Center and other local hospitals in Los Angeles, in addition to being the director of the Center for GI Health. He is a Los Angeles native and is thrilled to practice where he grew up.
Leo Treyzon, MD, MS
Leo Treyzon, MD, MS is a board-certified gastroenterologist. He is also board-certified in clinical nutrition. Dr. Treyzon has a sub-specialization in nutrition and obesity. He is the Chief of Gastroenterology at Cedars Sinai Medical Center where he also serves on the Cancer Committee and is an active member in four Centers of Excellence at Cedars Sinai: Weight Loss Center, Esophageal Disorders Center, the Colorectal Cancer Center, and the Inflammatory Bowel Disease Center. Additionally, Dr. Treyzon has a private practice in gastroenterology.
Maurice Elihu, MD
Dr. Maurice Elihu is a board-certified gastroenterologist that specializes in the comprehensive evaluation and prevention of colorectal cancers. He believes that the key to proper diagnosis and treatment is personal attention to every patient. Dr. Elihu is an active member of American College of Gastroenterology & Southern California Society of Gastroenterology as well as a Diplomate of the American Board of Internal Medicine and American Board of Gastroenterology. He also has his own private practice in gastroenterology and internal medicine.
Farshid Sam Rahbar, MD
Farshid Sam Rahbar, MD is the leading integrative gastroenterologist in Los Angeles, California. He is board-certified in Gastroenterology, Internal Medicine, Integrative Holistic Medicine, and Anti-Aging, Regenerative, and Functional Medicine. Dr. Rahbar incorporates anti-aging & functional medicine for an integrative-holistic approach to digestive care. He brings over 20 years of excellent technical skills in endoscopy and colonoscopy along with a Holistic-Integrative approach to each. He also has his own private pracitce.
Shahab Mehdizadeh, MD
Shahab Mehdizadeh, MD is board-certified in gastroenterology, internal medicine, and diseases of the liver. His research focuses on new and advanced endoscopic techniques with particular emphasis on prevention of cancers of the colon. Dr. Mehdizadeh greatly values the importance of nutrition in the treatment and prevention of disorders. He is board certified by the American Board of Physician Nutrition Specialists, and has his own practice in Beverly Hills.
Benjamin Basseri, MD is a gastroenterologist who specializes in the evaluation and management of difficulty swallowing (dysphagia), indigestion (dyspepsia), abdominal pain, irritable bowel syndrome, inflammatory bowel disease, and colorectal cancer screening. Dr. Basseri is also an active member of the American Gastroenterological Association, American College of Gastroenterology, and American Society for Gastrointestinal Endoscopy.
Dr. Marc D. Makhani is a gastroenterologist who is native of Los Angeles. Dr. Makhani centers his principles on a passion for promoting overall health and wellbeing. Dr. Makhani has a wide range of clinical and research interests that include colon cancer screening and prevention, motility disorders of the gastrointestinal tract, gastroesophageal reflux disease, peptic ulcer disease, irritable bowel syndrome and inflammatory bowel disease.
Contact a Los Angeles Barrett’s Specialist Today!
Our gastroenterologists specialize in the treatment of Barrett’s esophagus, and can help you on your way to recovery. Additionally, our patients may be eligible for surgery at Cedars Sinai with one of our renowned surgeons. To learn more about the Cedars Sinai Barrett’s esophagus TIFF procedure or to schedule a consultation at the Barrett’s Esophagus Center of Excellence, please call us at (888) 548-7614.
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