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Nikolaos Zacharias, MD, Obstetrics & Gynecology, Houston, TX

Nikolaos Zacharias MD FACOG (He/Him)

Obstetrics & Gynecology•Houston, TX

Maternal & Fetal Medicine/High Risk

Medical Education Director - Obstetrix MFM Specialists of Houston; MFM Director, OB/GYN Chairman- Saint Joseph's Medical Center; Clinical Professor of OB/GYN-MFM, at Texas A&M University Naresh K. Vashisht College of Medicine/ENMED; University of Houston Tilman J. Fertitta Family College of Medicine; MFM Faculty, Consultant, Houston Methodist OB/GYN Residency - Weill Cornell Medical College.

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  • 2100 Travis St#1250Houston, TX 77002

  • Phone+1 346-348-1980

  • Fax+1 281-763-7717

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Summary

  • Dr. Nikolaos Zacharias is an Obstetrician and Gynecologist based in Houston, TX, specializing in Maternal and Fetal Medicine with a focus on high-risk cases. He completed his medical training at the University of Athens and pursued postgraduate training at Baylor College of Medicine and the University of Texas Medical Branch Hospitals. Throughout his career, he has held leadership roles including Chairman of the OB/GYN Department at St. Joseph Medical Center and has served as a Clinical Professor at Texas A&M University and the University of Houston. Dr. Zacharias is also a consultant for multiple hospitals in Houston, with expertise in prenatal care techniques such as echocardiography and fetal ultrasound. His research has been published in reputable journals, covering topics such as prenatal ultrasound, placenta accreta spectrum, and Zika virus infection.

Education & Training

  • University of Texas Medical Branch Hospitals
    University of Texas Medical Branch HospitalsFellowship, Maternal-Fetal Medicine, 2002 - 2005
  • University of Texas Medical Branch Graduate School of Biomedical Sciences
    University of Texas Medical Branch Graduate School of Biomedical SciencesMMS, thesis pending, 2002 - 2005
  • Baylor College of Medicine
    Baylor College of MedicineChief Residency, Obstetrics and Gynecology, 2001 - 2002
  • Baylor College of Medicine
    Baylor College of MedicineResidency, Obstetrics and Gynecology, 1998 - 2002
  • Baylor College of Medicine
    Baylor College of MedicineInternship, Obstetrics and Gynecology, 1998 - 1999

Certifications & Licensure

  • TX State Medical License
    TX State Medical License 2005 - 2027
  • Obstetrics & Gynecology
    American Board of Obstetrics and Gynecology Obstetrics & Gynecology
  • Maternal-Fetal Medicine
    American Board of Obstetrics and Gynecology Maternal-Fetal Medicine

Awards, Honors, & Recognition

  • Clinical Professor of High-Risk Obstetrics/MFM Texas A&M University, Naresh K. Vashisht College of Medicine - School of Engineering Medicine, 2025
  • Chairman of OB/GYN Department St. Joseph Medical Center - Houston, 2025
  • Clinical Professor of High-Risk Obstetrics/MFM University of Houston Tilman J. Fertitta Family College of Medicine, 2025

Publications & Presentations

PubMed

Journal Articles

  • First Neonatal Demise with Travel-Associated Zika Virus Infection in the United States of America.  
    Zacharias N, Whitty J, Noblin S, Tsakiri S, Garcia J, Covinsky M, Bhattacharjee M, Saulino D, Tatevian N, Blackwell S., American Journal of Perinatology Reports, 4/13/2017
  • Maternal morbidity in patients with morbidly adherent placenta treated with and without a standardized multidisciplinary approach.  
    Shamshirsaz AA, Fox KA, Salmanian B, Diaz-Arrastia CR, Lee W, Baker BW, Ballas J, Chen Q, Van Veen TR, Javadian P, Sangi-Haghpeykar H, Zacharias N, Welty S, Cassady CI..., American Journal of Obstetrics and Gynecology, 2/1/2015
  • Prospective trial on obstructive sleep apnea in pregnancy and fetal heart rate monitoring  
    Olivarez S, Maheshwari B, McCarthy M, Zacharias NM, Van den Veyver I, Casturi L, Sangi-Haghpeykar H, Aagaard-Tillery K, American Journal of Obstetrics and Gynecology, 8/1/2010

Books/Book Chapters

  • Shnider & Levinson’s Anesthesia for Obstetrics 
    Chapter: Anesthesia for Vaginal Birth after Cesarean Delivery 
    Zacharias NM, LaToya Mason CEditors: Suresh M.Lippincott Williams & WilkinsEdition 5th,2012
  • Obstetric Imaging 
    Chapter: DiGeorge, Wolf-Hirschhorn and Cri-du-chat Syndromes 
    Zacharias NM, Van den Veyver IEditors: Copel J.McGraw-Hill2012

Abstracts/Posters

  • Maternal-fetal and gestational characteristics and microsomal aromatase activity in human placentas
    Zacharias NM, Society of Maternal-Fetal Medicine Annual (The pregnancy TM) Meeting, Dallas, TX, 2/1/2012
  • Creating a customized Birth Weight Standard for Harris County’s Hispanic Population
    Amini S, Francis A, Sangi-Haghpeykar H, Gardosi J, Zacharias NM, Society of Maternal-Fetal Medicine Annual (The pregnancy TM) Meeting, San Francisco, CA, 2/1/2011
  • Prevalence and clinical significance of Polyhydramnios during Screening Prenatal Sonography in a modern Hispanic cohort
    Kim J, Sangi-Haghpeykar H, Zacharias NM, Society of Maternal-Fetal Medicine Annual (The pregnancy TM) Meeting, San Francisco, CA, 2/1/2011

Lectures

  • Fetal anomaly case presentations 
    Texas Medical Center, Houston, TX - 3/1/2013
  • Prenatal imaging of fetal syndromes 
    Baylor College of Medicine, Houston TX - 2/1/2013
  • Fetal growth restriction 
    Baylor College of Medicine, Houston TX - 8/1/2012

Other

Committees

  • Member, Quality Assurance Committee - Ben Taub General Hospital 2011 - 2013
  • Member, Radiation Safety Committee - Baylor College of Medicine 2008 - 2013
  • Member, Texas Children's Fetal Center 2006 - 2013

Professional Memberships

Other Languages

  • Spanish, French, Greek

External Links

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