Dr. John O. Lai is an internist in Daly City, California and is affiliated with multiple hospitals in the area, including Seton Medical Center and California Pacific Medical Center-Mission Bernal Campus. He received his medical degree from University of Kansas School of Medicine and has been in practice for more than 20 years. Dr. John O. Lai has expertise in treating dementia, hypertension & high blood pressure, diabetes, among other conditions - see all areas of expertise. Dr. John O. Lai accepts Medicare, Aetna, Humana, Blue Cross, United Healthcare - see other insurance plans accepted.