Gregory R. Vlacich, MD, PhD

Gregory R. Vlacich, MD, PhD

Radiation Oncologist

Primary Academic Title

Associate Professor of Radiation Oncology, Washington University School of Medicine

Clinical Expertise

As a member of our lung, esophageal, prostate and head and neck cancer specialist teams, Dr. Vlacich cares for patients diagnosed with these cancers through treatment and recovery.


  • 2007: MD, University of Chicago
  • 2009: PhD, molecular genetics and cell biology, University of Chicago


  • 2009 - 2010: Intern, department of medicine, St. Vincent's Catholic Medical Center, New York City
  • 2010 - 2014: Resident, radiation oncology, Vanderbilt University Medical Center, Nashville

Board Certification

  • 2016: American Board of Radiology - radiation oncology

Selected Research Publications

Pre-radiotherapy ctDNA liquid biopsy for risk stratification of oligometastatic non-small cell lung cancer.
  • Semenkovich NP, Badiyan SN, Samson PP, [...] Vlacich G, [...] Chaudhuri AA
  • NPJ Precis Oncol 2023

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Contact Information

  • Washington University Medical Campus

    4921 Parkview Place
    Saint Louis, MO 63110

Phone Numbers

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