Gastroenterology, weight + lifestyle management

gastroenterology + TIF

Advocating for healthy communities and preventative medicine since 1991


We're dedicated to treating digestive and liver disorders.

Dr. Ko has been in the gastroenterology medical practice since 1991, helping the local Orange County community to stay healthy and prevent serious illnesses before they manifest.  We specialize in the treatment of digestive and liver-related disorders and bring extensive experience and professionalism to every patient, customizing our support to your individual needs and concerns.

While practicing medicine for over 25 years, we have stayed up-to-date on the latest technological developments in medicine.  We have found the balance between the advantages and constraints of modern medicine, providing our patients with the exceptional service and advice needed to identify and correct disorders and maintain good health for years to come.

Contact us to set up a consultation or to inquire whether our services are right for you.





11100 Warner Ave., Suite 216
Fountain Valley, CA 92708

25401 Cabot Road, Suite 101
Laguna Hills, CA 92653

(714) 545-7311 | FV
(949) 364-9660 | LH


The good physician treats the disease; the great physician treats the patient who has the disease.
— Sir William Osler