Ethan Bortniker, MD
Practice: Unio Specialty Care
Specialty: Gastroenterology
Office locations: Encinitas, San Diego
Dr. Ethan Bortniker, M.D., MBA, earned his medical degree at Boston University and completed his internal medicine residency at Boston Medical Center and his gastroenterology fellowship at the University of Connecticut. Board-certified by the ABIM, he previously served on the faculty at UConn and UCSD. He specializes in general gastroenterology, GI motility, disorders of the gut-brain axis, colorectal cancer screening, liver disease, colonoscopy, and EGD.
Dr. Ethan Bortniker, M.D., MBA, earned his medical degree at Boston University and completed his internal medicine residency at Boston Medical Center and his gastroenterology fellowship at the University of Connecticut. Board-certified by the ABIM, he previously served on the faculty at UConn and UCSD. He specializes in general gastroenterology, GI motility, disorders of the gut-brain axis, colorectal cancer screening, liver disease, colonoscopy, and EGD.
GI-Encinitas
Suite #100
Encinitas, CA
GI-San Diego - Rancho Bernardo
Suite 270B
San Diego, CA 92128
Dr. Ethan Bortniker, M.D., completed the 7-year BA/MD program at Boston University, followed by internal medicine residency at Boston Medical Center. After a year as a hospitalist at Boston Medical Center, Dr. Bortniker pursued a Gastroenterology fellowship at the University of Connecticut, where he stayed on as faculty for three years, actively participating in teaching and research activities in colon cancer prevention, serving as director of the motility program, and earning an MBA from UConn.
In 2019, life brought Dr. Bortniker to the sunshine of Southern California, where he joined faculty at UCSD and the San Diego VA. He is affiliated with Scripps Memorial Hospital Encinitas and Scripps Memorial Hospital La Jolla.
Dr. Bortniker practices general Gastroenterology with an interest in motility, disorders of the brain-gut axis, prevention of GI tract cancers, liver disease, and general endoscopy, including colonoscopy, EGD, and capsule endoscopy.
Dr. Bortniker is passionate about preventive care and early detection of gastrointestinal conditions, including colorectal cancer. He encourages all eligible adults to get screened and stay proactive about their digestive health. To learn more about why colon cancer screening is so important — and how to get started — visit our Colon Cancer Screening Resource Page.

Dr. Bortniker is excellent doctor, he listen and takes care of patients
Dr. Bortniker and the entire team from reception to all the nurses were really profeesional, communicative, and it was just a great experience.
Excellent listener and care! Staff all friendly
He seemed to understand what had previously occurred and some things that needed to be clarified.
Doctor Ethan Bortniker cares for his patients.
Excellent dr i wont see anyone else. Good manners - explains everything and he will answer ALL your questions
Best Doctor, best staff, they made us feel comfortable during a very stressful time.
He was very patient, knowledgeable and professional!
Smart, great listener and takes time to explain thoroughly.
great personality! very thoughtful made me feel very comfortable. the staff was excellent as well.