Jun 27, 2018 · Dr. Oscar A Hernandez, MD . Obstetrics & Gynecology. Harlingen, TX 78550 (3 other locations) Is this you? Claim your profile (956) 425-4901 Read Reviews . Quick Facts . ACCEPTING NEW PATIENTS ; 5.0 . 1 Rating . SPEAKS English, Spanish ; Univ Of Tx Hlth Sci Ctr At San Antonio Joe R & Teresa Lozano Long Schof Med ;.