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Dr. Hierro is on Doximity

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Education & Training

  • UCLA David Geffen School of Medicine/UCLA Medical Center
    UCLA David Geffen School of Medicine/UCLA Medical CenterFellowship, Gastroenterology, 1990 - 1993
  • Los Angeles County-Harbor-UCLA Medical Center
    Los Angeles County-Harbor-UCLA Medical CenterResidency, Internal Medicine, 1987 - 1990
  • David Geffen School of Medicine at UCLA
    David Geffen School of Medicine at UCLAClass of 1987

Certifications & Licensure

  • CA State Medical License
    CA State Medical License 1989 - 2026
  • American Board of Internal Medicine Gastroenterology

Awards, Honors, & Recognition

  • CMS Meaningful Use Stage 1 Certification Patient Chart Manager EHR, Prime Clinical Systems, 2012
  • Super Doctor SuperDoctors.com
  • Top MD Consumers Checkbook

Professional Memberships

Other Languages

  • Spanish

Hospital Affiliations