Meet The StaffPatient Forms & InfoWhat is Retainer Medicine? Call Us At 415-925-3617 or Fill Out The Form Below: * First Last Email* PhoneQuestions or Comments Δ Contact / Directions MICHAEL K. KWOK, M.D. Diplomate, American Board of Internal Medicine PHONE: 415-925-3617 FAX: 415-925-3597 895 Sir Francis Drake Boulevard San Anselmo, CA 94960 MON – FRI 9:30am – 5:00pm