Simon A. Humphries, M.D. 811 Altos Oaks Dr, Los Altos, CA94024 Dr. Simon A. Humphries is a general practice physician based in Los Altos. Dr. Humphries specializes in internal…More medicine and is board certified by the American Board of Internal Medicine. The office can help with a wide range of issues including high blood pressure, heart issues, and diabetes as well as other internal problems. Call for more information or to schedule a consultation.