William, Lai M.D.Attending PhysicianRheumatology Internal Medicine Education: Ohio State University College of MedicineMain Office:866-735-2922 Kaiser Permanente 2295 S. Vineyard Ave Ontario, CA 91761 Clinic Intersts:internal medicine and primary care.Certification: Board Certified in Rheumatology, Internal Medicine Additional Office: 9961 Sierra Ave, Fontana, CA 92553 Office Hours: Mon8:30 am - 5:00 pm Tue8:30 am - 5:00 pm Wed8:30 am - 5:00 pm Thu8:30 am - 5:00 pm Fri8:30 am - 5:00 pm Sat7:00 am - 12:00 pm SunClosed