Dr. John Koksen Chan, MD

Dr. John Chan is an ophthalmologist who earned his medical degree from New York Medical College and completed his residency at UC Irvine Medical Center. With nearly three decades of practice experience, he specializes in comprehensive eye care with particular expertise in treating complex eye conditions. His bilingual abilities allow him to serve patients in both English and Spanish.

Dr. Chan practices at multiple locations including California Pacific Medical Center Davies Campus and Kaiser Permanente facilities in Union City and San Francisco. He focuses on managing cataracts, glaucoma, and diabetic eye disease. His practice utilizes advanced diagnostic techniques such as retinal imaging and optical coherence tomography to monitor eye health, along with tonometry for measuring eye pressure. Patients consistently rate Dr. Chan highly, giving him an average rating of 5.0.