John R. Wuchenich, MD Share: John R. Wuchenich, MD Visit Website 100 S. Ellsworth Ave Suite 609 San Mateo, CA 94401 (650) 505-5152 Hours: Monday, Wednesday, Thursday, Friday: 8-5 Tuesday: 12-5 Other times available by appointment only About Map About John R. Wuchenich, MD is a board-certified internal medicine physician who practices primary care in San Mateo.He attended medical school at Loma Linda University School of Medicine in Lom What's Nearby? Distance: 5 10 15 20 25 50 mi.