Dr. Ruben John Alvero, MD is a health care provider primarily located in Sunnyvale, CA, with other offices in Aurora, CO and Providence, RI. He has 38 years of experience. His specialties include Obstetrics & Gynecology, Reproductive Endocrinology, Endocrinology, Diabetes & Metabolism. Dr. Alvero is affiliated with Denver VA Medical Center. He speaks English.