Physicians & Staff

Ken Chow, M.D.

Joined NVGI in 1997.


Siva P. Doma, M.D.

Dr. Doma joined North Valley Gastroenterology Medical Group in 2010 and is a board certified in Gastroenterology. Dr. Doma finished his fellowship training at Temple University Hospital, Philadelphia, PA, with advanced training in Gastrointestinal Motility Disorder.


Alex Kim, D.O.

Raised by immigrant parents in the Midwest set the course for me in life. I lived my goal of serving as a military physician and ultimately achieving the rank of Lieutenant Colonel in the Air Force prior to focusing on family life. Nurtured by my parents, I believe in holistic approach in patient care. Although a subspecialists, I know the relationship between the mind, body and spirit is vital to the patient care. This is the core of my approach to the patient care. Living extensively throughout America and experiences from overseas deployments, I saw commonalty the to achieve a “Goodlife” in most. That is one of the main reasons I am a gastroenterologist, I appreciate the opportunity to see a diverse population and illnesses with a goal of achieving optimal GI health for you and your loved ones.



Debra Neilson

Debra has been with North Valley Gastroenterology since 2015. She has been the office manager to NVGI.


Lori Skevington

Lori has worked as a full time ICU nurse. In 2015 she joined the Endoscopy Center as a per diem procedural nurse. In 2019 she was appointed the clinical manger of The Endoscopy Center.