Dr. Nikolaos Zacharias


Maternal-Fetal Medicine , Board Certified

Houston, TX

Dr. Nikolaos Zacharias's honors

Dr. Nikolaos Zacharias's bio

Nikolaos Zacharias, MD, FACOG, is a native of Greece; he earned his medical diploma with excellence from the National & Kapodistrian University of Athens, Greece (1995) reciting the Hippocratic Oath as a top graduate in his class. Dr. Zacharias received numerous Hellenic scholarships for undergraduate and postgraduate education (1989-2002). He trained in Obstetrics & Gynecology at Baylor College of Medicine, (1998-2002), elected chief resident in 2001. He received the Council of Resident Education in Obstetrics & Gynecology Outstanding Academic Achievement Award four consecutive years (1999-2002) for scoring at the top 3% of his U.S. peers at these annual examinations. His passion for prenatal sonography and profound interest in pregnancy complications led him to a fellowship in Maternal-Fetal Medicine at the University of Texas Medical Branch, in Galveston, Texas (2002-2005), where he received the UTMB Hospital Academic Fellowship Award (2002-2005) and enrolled in a Masters in Medical Science post-graduate program on clinical research design (2003-2005, all courses passed with excellence, thesis defense pending). Dr. Zacharias returned to Baylor as assistant professor of Obstetrics & Gynecology, in the Maternal Fetal Medicine Division (2005 - 2013). He served as medical director of the Harris Health System Prenatal Ultrasound Screening Program (2005 - 2012) and as founding medical director of the Ben Taub Maternal Fetal Medicine Prenatal Ultrasound Unit (2008 - 2012), having supervised over 30,000 prenatal sonograms. Dr. Zacharias has been an active member of the Texas Children’s Fetal Center (2006-2013), teaching faculty at Ben Taub General (2005 - 2013) and Texas Children’s Hospital (2008 - 2013). He is board-certified in Obstetrics & Gynecology (2008) and Maternal Fetal Medicine (2011). Dr. Zacharias received Baylor's medical student faculty teaching award (2011) and was elected to America's Top Obstetricians & Gynecologists (2012). He co-directed the maternal-fetal medicine elective clerkship at Baylor College of Medicine with Dr. Robert Carpenter (2012-2013). Dr. Zacharias is a fellow of the American College of Obstetricians & Gynecologists (2010) and a regular member of the Society for Maternal-Fetal Medicine (2012). On August 2013 Dr. Zacharias became the inaugural Medical Director of Prenatal Ultrasound and Maternal-Fetal Medicine at the Center for Medical Genetics - collaborating with Geneticist Dr. Katherine Thompson. His focus will be on consultative perinatology and prenatal sonography with genetic testing, serving his beloved Southeast Texas population. Languages spoken: English, Spanish, French and Greek.

Dr. Nikolaos Zacharias's Locations

Center for Medical Genetics

  • 7400 Fannin Street
  • Suite 700
  • Houston TX 77054
  • 7137901990
  • (713) 790-1903

Dr. Nikolaos Zacharias's Visit Information



  • Greek
  • English
  • French
  • Spanish


  • Sun     -
  • Mon     8am-5pm
  • Tues     8am-5pm
  • Wed     8am-5pm
  • Thurs     8am-5pm
  • Fri     8am-5pm
  • Sat     -


  • Blue Cross Blue Shield of Texas:
  • Aetna Life Insurance Company:
  • UnitedHealthcare:

Expert's Gender

  • M


  • www.geneticstesting.com



  • Iconabms Maternal-Fetal Medicine
  • Iconabms obstetrics & Gynecology - Maternal Fetal Medicine
  • Iconabms obstetrics & Gynecology

Hospital Affiliations

  • Ben Taub General Hospital
  • Harris Health System
  • Texas Children's Hospital

Dr. Nikolaos Zacharias's Education & Experience

Academic Appointments

  • Asst. Professor in Maternal-Fetal Medicine, Baylor College of Medicine, 2005-2013


  • Baylor College of Medicine
    Obstetrics and Gynecology


Medical Schools

  • National University of Athens Faculty of Medicine, Greece 1995

Dr. Nikolaos Zacharias's Awards & Affiliations


  • UTMB Hospital Academic Fellowship Award, 2002-2005.
  • CREOG/ACOG outstanding Academic Achievement Award, 1999-2002.
  • Papadakis Undergraduate Hellenic Award, 1989-1995.
  • Kontoleon Postgraduate Hellenic Award, 1998-2002.
  • America's Top Obstetricians & Gynecologists, 2012, 2013
  • Baylor College of Medicine Student Faculty Teaching Award, 2011-2012.


  • Society for Maternal-Fetal Medicine
  • American College of Obstetricians and Gynecologists
  • Harris County Medical Society
  • American Institute of Ultrasound in Medicine

Dr. Nikolaos Zacharias's Publications


Perinatal mortality

Up To Date,

22q11.2 Deletion [DiGeorge] syndrome

Obstetric Imaging, 2012

5p- Syndrome (Cri du Chat)

Obstetric Imaging, 2012

4p- Deletion syndrome (Wolf-Hirschhorn)

Obstetric Imaging, 2012

Anesthesia for Vaginal Birth after Cesarean Delivery

Shnider & Levinson's Anesthesia for Obstetrics 5th edition, 2012

Maternal-Fetal characteristics and aromatase activity in term human placental microsomes.

Journal of the Society for Gynecologic Investigation, 2004

Aspirin in the prevention of preeclampsia: A systematic review.

American Journal of Obstetrics and Gynecology, 2003

Aspirin for the Prevention of Fetal Growth Restriction (FGR): A Systematic Review

American Journal of Obstetrics and Gynecology, 2002

Dr. Nikolaos Zacharias's Blog & Additional Links

  • https://www.doximity.com/pub/nikolaos-zacharias-md
  • http://nikolaoszacharias.md.com/