Yifan, Geng M.D.Attending PhysicianInternal Medicine Hospital Medicine Education: Tufts University School Of MedicineMain Office:925-295-4000 Kaiser Permanente 1425 S Main St 4th Floor Walnut Creek, CA 94596 Clinic Intersts:hospital medicine(inpatient services).Certification: Board Certified in Internal Medicine Hospital Affiliations: Walnut Creek Medical Center Santa Clara Homestead Medical Center Certifications: Board-Certified in internal Medicine Office Hours: Monday - Sunday: 6:30 a.m. - 5 p.m.