Gastroenterology 

Both Drs. Rayyes and Bali provide diagnosis and treatment of diseases and conditions related to the small and large intestine. One of the most common services is the annual colonoscopy for patients over 50 years of age (or earlier if personal or familiy history of intestinal conditions or cancer). Both physicians see patients at our Yorba Linda campus.

Amer Rayyes, MD 

He completed medical school at the American University of Beirut, in Lebanon, and did his internship and residency at St. Luke's Hospital Center in New York. He completed a fellowship in Gastroenterology at Peter Bent Brigham Hospital in Boston, Massachusetts. 

He has been certifed in both Internal Medicine and Gastroenterology by the American Board of Internal Medicine.

Ambika Bali, MD 

Dr. Bali earned her medical degree from Maulana Azad Medical College, in New Delhi, India. She then received certificates of licensure and specialty study (L.R.C.P., M.R.C.S) from the Royal College of Physicians and Surgeons in London. She achieved the status of Fellow in Gastroenterology and Internal Medicine from the Royal College of Physicians and Surgeons in Canada.

She has been certified in both Internal Medicine and Gastroenterology by the American Board of Internal Medicine.