Faculty in the Department of Radiation Oncology provide leadership in Siteman Cancer Center and contribute significantly to developmental therapeutic and clinical trials research.
Department Leadership
![](https://radonc.wustl.edu/files/2018/07/dennishallahan-1-2f84v17.jpg)
Dennis E. Hallahan, MD, FASTRO
Elizabeth H. and James S. McDonnell III Distinguished Professor of Medicine Chair, Department of Radiation Oncology
![](https://radonc.wustl.edu/files/2018/07/jeffmichalski-1-21oyox2.jpg)
Jeff M. Michalski, MD, MBA, FASTRO
Carlos A. Perez Distinguished Professor
Vice Chair and Director of Clinical Programs
![](https://radonc.wustl.edu/files/2020/05/Hugo_Geoff_updated.jpg)
Geoffrey Hugo, PhD, FAAPM
Professor of Radiation Oncology, Vice Chair of Medical Physics
![](https://radonc.wustl.edu/files/2018/07/julieschwarz-21zov36.jpeg)
Julie K. Schwarz, MD, PhD
Professor of Radiation Oncology, Vice Chair, Research, Cancer Biology Division Chief
These values constantly guide our department leadership in decision-making and interaction with our team!
![](https://radonc.wustl.edu/files/2021/07/EF_CoreValues2_Rev2_Horizontal_ForWebsite.jpg)
![Christopher D. Abraham, MD](https://radonc.wustl.edu/files/2018/07/christopherabraham-2gb5p76-280x386.jpeg)
Christopher D. Abraham, MD
Associate Professor of Radiation Oncology
Medical Director of Clinical Informatics
- Phone: 314-362-8610
Executive Assistant: Leigh Ann Zupan (lzupan@wustl.edu)
![Michael Altman, PhD](https://radonc.wustl.edu/files/2018/07/michaelaltman-27pd1na-280x386.jpg)
Michael Altman, PhD
Associate Professor of Radiation Oncology
Director of Education in Medical Physics
- Phone: 314-362-4818
- Email: m.altman@wustl.edu
![Anthony J. Apicelli, MD, PhD](https://radonc.wustl.edu/files/2018/07/anthonyapicelli-1ivn3ws-280x386.jpg)
Anthony J. Apicelli, MD, PhD
Associate Professor of Radiation Oncology
- Phone: 314-362-8610
Executive Assistant: Christina Mossinghoff (cmossinghoff@wustl.edu)
![Carmen Bergom, MD, PhD](https://radonc.wustl.edu/files/2020/09/Bergom-Carmen_RadOnc__05_web_EDITED-280x386.jpg)
Carmen Bergom, MD, PhD
Associate Professor of Radiation Oncology
- Phone: 314-747-1786
Executive Assistant: Lena Zein (lena.a@wustl.edu)
![Amit Bhatt, MD, PhD](https://radonc.wustl.edu/files/2023/10/Bhatt-Amit_RadOnc_web-280x386.jpg)
Amit Bhatt, MD, PhD
Assistant Professor of Radiation Oncology
- Phone: 314-747-7236
Executive Assistant: Christina Mossinghoff (cmossinghoff@wustl.edu)
![Douglas F. Caruthers, MS](https://radonc.wustl.edu/files/2018/07/douglascaruthers-sjkeh8-280x386.jpg)
Douglas F. Caruthers, MS
Instructor of Radiation Oncology
- Phone: 314-362-2639
- Email: dfcaruthers@wustl.edu
![Jessika Contreras, MD](https://radonc.wustl.edu/files/2022/12/Contreras-Jessika_RadOnc_05preferred_crop_WEB-280x386.jpg)
Jessika Contreras, MD
Assistant Professor of Radiation Oncology
Chief, Gynecological Oncology and Brachytherapy
Executive Assistant: Nicole Castleberry (nicole.c@wustl.edu)
![David T. Curiel, MD, PhD](https://radonc.wustl.edu/files/2018/07/davidcuriel-2a45j9i-280x386.jpg)
David T. Curiel, MD, PhD
Professor of Radiation Oncology
- Phone: 314-747-5443
- Email: dcuriel@wustl.edu
![Arash Darafsheh, PhD](https://radonc.wustl.edu/files/2017/09/Darafsheh-Arash_RadOnc_Headshot_web-280x386.jpg)
Arash Darafsheh, PhD
Associate Professor of Radiation Oncology
- Phone: 314-362-2639
- Email: arash.darafsheh@wustl.edu
![Jennifer De Los Santos, MD](https://radonc.wustl.edu/files/2024/04/De-Los-Santos-Jennifer_RadOnc_web-b8b48070ed8fc790-280x386.jpg)
Jennifer De Los Santos, MD
Professor of Radiation Oncology
Executive Assistant: Leigh Ann Zupan (lzupan@wustl.edu)
![Carl DeSelm, MD, PhD](https://radonc.wustl.edu/files/2018/07/DeSelm-Carl_RadOnc_05_crop-web-280x386.jpg)
Carl DeSelm, MD, PhD
Assistant Professor of Radiation Oncology
- Phone: 314-273-2931
Executive Assistant: Steve Paglusch (steven.paglusch@wustl.edu)
![Igor Dmitriev, PhD](https://radonc.wustl.edu/files/2018/07/igordmitriev-28cdhqu-280x386.jpg)
Igor Dmitriev, PhD
Associate Professor of Radiation Oncology
- Phone: 314-362-9775
- Email: idmitriev@wustl.edu
![Jose Garcia-Ramirez, MS](https://radonc.wustl.edu/files/2018/07/josegarciaramirez-1eqfg45-280x386.jpg)
Jose Garcia-Ramirez, MS
Assistant Professor of Radiation Oncology
- Phone: 314-362-2639
- Email: jramirez@wustl.edu
![Hiram A. Gay, MD](https://radonc.wustl.edu/files/2018/07/hiramgay-23me283-280x386.jpeg)
Hiram A. Gay, MD
Professor of Radiation Oncology
Chief, Genitourinary Service
Medical Director of Radiation Oncology, Siteman Cancer Center – South County
- Phone: 314-362-8516
Executive Assistant: Estella Scott (eascott@wustl.edu)
![Bruce Gu, PhD](https://radonc.wustl.edu/files/2018/07/brucegu-1kxa5h0-280x386.jpg)
Bruce Gu, PhD
Assistant Professor of Radiation Oncology
- Phone: 314-362-2639
- Email: brucegu@wustl.edu
![Lannis Hall, MD, MPH](https://radonc.wustl.edu/files/2020/09/Lannis-Hall-2020_useThisOne_web-280x386.jpg)
Lannis Hall, MD, MPH
Associate Professor of Clinical Radiation Oncology
Vice Chair, SCC Clinical Research Committee
SCC Director of Diversity and Inclusion in Clinical Research
Medical Director of Radiation Oncology, SCC at Barnes-Jewish St. Peters Hospital
Clinical Trials Leader, Program to Eliminate Cancer Disparities
- Email: lannishall@wustl.edu
Executive Assistant: Nicole Castleberry (nicole.c@wustl.edu)
![Dennis E. Hallahan, MD, FASTRO](https://radonc.wustl.edu/files/2018/07/dennishallahan-1-2f84v17-280x386.jpg)
Dennis E. Hallahan, MD, FASTRO
Elizabeth H. and James S. McDonnell III Distinguished Professor of Medicine
Chair, Department of Radiation Oncology
- Phone: 314-362-9700
Executive Assistant: Jeanne Silvestrini (j.silvestrini@wustl.edu)
![Yao Hao, PhD](https://radonc.wustl.edu/files/2019/08/HaoYao_LowRes-280x386.jpg)
Yao Hao, PhD
Assistant Professor of Radiation Oncology
Chief of Image Services
- Phone: 314-273-2987
- Email: yaohao@wustl.edu
![Jiayi Huang, MD, MSCI](https://radonc.wustl.edu/files/2018/07/jiayihuang-1svwqh7-280x386.jpeg)
Jiayi Huang, MD, MSCI
Associate Professor of Radiation Oncology
Chief, CNS/Gamma Knife Service
Co-director, Brain Tumor Center at Siteman Cancer Center
- Phone: 314-273-2931
Executive Assistant: Christina Barr (barrchristina@wustl.edu)
![Geoffrey Hugo, PhD](https://radonc.wustl.edu/files/2018/07/Hugo-2cy8mhx-280x386.jpg)
Geoffrey Hugo, PhD
Professor of Radiation Oncology
Vice Chair of Medical Physics
- Phone: 314-362-2639
- Email: gdhugo@wustl.edu
Executive Assistant: Jennifer McDermott (boemerj@wustl.edu)
![Vaishali Kapoor, PhD](https://radonc.wustl.edu/files/2019/08/KapoorV-72-280x386.jpg)
Vaishali Kapoor, PhD
Assistant Professor of Radiation Oncology
- Phone: 314-362-9914
- Email: vkapoor@wustl.edu
![Hyun Kim, MD](https://radonc.wustl.edu/files/2017/10/Kim_Hyun_RadOnc_22_Crop_web-280x386.jpg)
Hyun Kim, MD
Associate Professor of Radiation Oncology
Chief, Gastrointestinal Service
Chief, MR-Guided Radiotherapy
- Phone: 314-362-8567
Executive Assistant: Amy Akers (akersa@wustl.edu)
![Taeho Kim, PhD](https://radonc.wustl.edu/files/2019/03/Kim-Taeho_RadOnc_web-1axw114-280x386.jpg)
Taeho Kim, PhD
Professor of Radiation Oncology
Chief, SRS Medical Physics Services (Lead GK AMP)
- Phone: 314-273-3316
- Email: taehokim@wustl.edu
![Nels Knutson, PhD](https://radonc.wustl.edu/files/2018/07/nelsknutson-1gs4kxn-280x386.jpg)
Nels Knutson, PhD
Associate Professor of Radiation Oncology
Chief, Clinical Medical Physics
- Phone: 314-362-2639
- Email: nknutson@wustl.edu
Executive Assistant: Jennifer McDermott (boemerj@wustl.edu)
![Susan Laduzinsky, MD](https://radonc.wustl.edu/files/2018/08/Ladusinsky-2dgnj8w-280x386.jpeg)
Susan Laduzinsky, MD
Assistant Professor of Radiation Oncology
Medical Director of Radiation Oncology, Siteman Cancer Center at Memorial Hospital East
Executive Assistant: Steve Paglusch (steven.paglusch@wustl.edu)
![Eric Laugeman](https://radonc.wustl.edu/files/2018/07/Laugeman-1vsb4g6-280x386.jpg)
Eric Laugeman
Clinical Staff Physicist
Chief, Adaptive RT Physics
- Phone: 314-362-2639
- Email: elaugeman@wustl.edu
![Jason Lee, MD, PhD](https://radonc.wustl.edu/files/2018/08/Jason-Lee-rbrk3i-280x386.jpeg)
Jason Lee, MD, PhD
Assistant Professor of Radiation Oncology
Executive Assistant: Christy Hanson (chanson@wustl.edu)
![Calvin Lewis, MD, PhD](https://radonc.wustl.edu/files/2023/07/Lewis-Calvin_Onc_05_web-280x386.jpg)
Calvin Lewis, MD, PhD
Instructor of Radiation Oncology
- Email: calvinlewis@wustl.edu
Executive Assistant: Steve Paglusch (steven.paglusch@wustl.edu)
![Hua Li, PhD, DABR](https://radonc.wustl.edu/files/2021/10/Li_Hua-2021_web-280x386.jpg)
Hua Li, PhD, DABR
Professor of Radiation Oncology
- Email: li.hua@wustl.edu
Executive Assistant: Alice Canavan (canavana@wustl.edu)
![Zhi Hong Lu, PhD](https://radonc.wustl.edu/files/2020/03/Lu-Zhi-Hong_RadOnc_Web-280x386.jpg)
Zhi Hong Lu, PhD
Assistant Professor of Radiation Oncology
- Phone: 314-362-3236
- Email: zhihonglu@wustl.edu
![Stephanie Markovina, MD, PhD](https://radonc.wustl.edu/files/2018/07/stephaniemarkovina-29s4p0d-280x386.jpeg)
Stephanie Markovina, MD, PhD
Assistant Professor of Radiation Oncology
- Phone: 314-747-1786
Executive Assistant: Lena Zein (lena.a@wustl.edu)
![Nichole M. Maughan, PhD, MS](https://radonc.wustl.edu/files/2020/02/Maughan-Nichole_RadOnc_web-280x386.jpg)
Nichole M. Maughan, PhD, MS
Assistant Professor of Radiation Oncology
- Phone: 314-749-8759
- Email: maughan.nichole@wustl.edu
![Thomas Mazur, PhD](https://radonc.wustl.edu/files/2018/07/thomasmazur-12ma3h0-280x386.jpg)
Thomas Mazur, PhD
Assistant Professor of Radiation Oncology
Chief, SBRT
- Phone: 314-362-2639
- Email: tmazur@wustl.edu
![Jeff M. Michalski, MD, MBA, FASTRO](https://radonc.wustl.edu/files/2018/07/jeffmichalski-1-21oyox2-280x386.jpg)
Jeff M. Michalski, MD, MBA, FASTRO
Carlos A. Perez Distinguished Professor
Vice Chair and Director of Clinical Programs
- Phone: 314-362-8566
Executive Assistant: Gayle Bumb (gbumb@wustl.edu)
![Timothy Mitchell, PhD](https://radonc.wustl.edu/files/2018/07/timothymitchell-1rzdywa-280x386.jpg)
Timothy Mitchell, PhD
Assistant Professor of Radiation Oncology
- Phone: 314-362-2639
- Email: tjmitchell@wustl.edu
![Allen Mo, MD, PhD](https://radonc.wustl.edu/files/2023/08/Mo-Allen_RadOnc_04_crop_web-280x386.jpg)
Allen Mo, MD, PhD
Assistant Professor of Radiation Oncology
Executive Assistant: Amy Akers (akersa@wustl.edu)
![Michael Moravan, MD, PhD](https://radonc.wustl.edu/files/2023/01/Moravan-Michael_RadOnc_02web-280x386.jpg)
Michael Moravan, MD, PhD
Assistant Professor of Radiation Oncology
Medical Director, Siteman Cancer Center at Northwest HealthCare
Executive Assistant: Christina Mossinghoff (cmossinghoff@wustl.edu)
![Naim Ozturk, PhD](https://radonc.wustl.edu/files/2018/08/ozturk-cc-2g4bbbi-280x386.jpg)
Naim Ozturk, PhD
Chief Physicist, Cox Health Springfield
- Phone: 314-362-2639
- Email: nozturk@wustl.edu
![Stephanie M. Perkins, MD](https://radonc.wustl.edu/files/2016/10/Perkins-Stephanie_RadOnc_04_New2022_crop_web-280x386.jpg)
Stephanie M. Perkins, MD
S. Lee Kling Endowed Chair in Radiation Oncology
Director, S. Lee Kling Proton Therapy Center
Chief, Pediatric Radiotherapy Service
Professor of Radiation Oncology
- Phone: 314-273-2931
Executive Assistant: Christina Barr (barrchristina@wustl.edu)
![Michael Prusator, PhD](https://radonc.wustl.edu/files/2020/07/Prusator-Michael_crop_webs_04-280x386.jpg)
Michael Prusator, PhD
Assistant Professor of Radiation Oncology
Chief, External Beam Physics
- Phone: 314-273-1429
- Email: m.prusator@wustl.edu
![Nikhil Rammohan, MD, PhD](https://radonc.wustl.edu/files/2023/09/Rammohan-Nikhil_RadOnc_05_Crop_web-280x386.jpg)
Nikhil Rammohan, MD, PhD
Assistant Professor of Radiation Oncology
Executive Assistant: Christina Barr (barrchristina@wustl.edu)
![Clifford G. Robinson, MD](https://radonc.wustl.edu/files/2016/10/Robinson-Clifford_RadOnc_04_2022_web-280x386.jpg)
Clifford G. Robinson, MD
Professor of Radiation Oncology
Chief, Stereotactic Body Radiation Therapy (SBRT)
Associate Director, Clinical Programs
- Phone: 314-362-8567
Executive Assistant: Amy Akers (akersa@wustl.edu)
![Buck Rogers, PhD](https://radonc.wustl.edu/files/2018/07/buckrogers-18gn7q6-280x386.jpg)
Buck Rogers, PhD
Associate Director, Cancer Biology Division
Professor of Radiation Oncology
- Phone: 314-362-9787
- Email: b.rogers@wustl.edu
![Pamela Samson, MD, MPHS](https://radonc.wustl.edu/files/2020/08/Samson-Pamela_RadOnc_DB02_web-280x386.jpg)
Pamela Samson, MD, MPHS
Assistant Professor of Radiation Oncology
- Phone: 314-747-1786
Executive Assistant: Lena Zein (lena.a@wustl.edu)
![Matthew Schmidt, PhD](https://radonc.wustl.edu/files/2019/03/Matthew_Schmidt-24lf8zh-280x386.jpg)
Matthew Schmidt, PhD
Assistant Professor of Radiation Oncology
Chief, Quality Assurance
- Email: matthew.schmidt@wustl.edu
![Julie K. Schwarz, MD, PhD](https://radonc.wustl.edu/files/2018/07/julieschwarz-21zov36-280x386.jpeg)
Julie K. Schwarz, MD, PhD
Professor of Radiation Oncology, Vice-Chair, Research, Cancer Biology Division Director
- Phone: 314-273-0275
Executive Assistant: Kathy Hentrich (k.hentrich@wustl.edu)
![William Straube, MS](https://radonc.wustl.edu/files/2018/07/williamstraube-1ropvi1-280x386.jpg)
William Straube, MS
Research Associate Professor of Radiation Oncology
- Phone: 314-362-9762
- Email: straube@wustl.edu
![Maria A. Thomas, MD, PhD](https://radonc.wustl.edu/files/2018/07/mariathomas-2mg1jk3-280x386.jpg)
Maria A. Thomas, MD, PhD
Associate Professor of Radiation Oncology
- Phone: 314-362-8516
Executive Assistant: Estella Scott (eascott@wustl.edu)
![Wade L. Thorstad, MD](https://radonc.wustl.edu/files/2018/07/wadethorstad-2itpjg3-280x386.jpg)
Wade L. Thorstad, MD
Professor of Radiation Oncology
Chief, Head and Neck Cancer Service
- Phone: 314-362-8516
Executive Assistant: Estella Scott (eascott@wustl.edu)
![Gregory R. Vlacich, MD, PhD](https://radonc.wustl.edu/files/2018/07/gregoryvlacich-255v1df-280x386.jpeg)
Gregory R. Vlacich, MD, PhD
Associate Professor of Radiation Oncology
Clinical Director for Satellite Operations
Medical Director of Radiation Oncology, Alton Memorial Hospital
- Phone: 314-362-8610
Executive Assistant: Steve Paglusch (steven.paglusch@wustl.edu)
![Phillip Wall, PhD, MS](https://radonc.wustl.edu/files/2022/10/Wall_Phillip_web-280x386.jpg)
Phillip Wall, PhD, MS
Assistant Professor of Radiation Oncology
Assistant Program Director, Medical Physics Residency Program
- Email: phillip.wall@wustl.edu
![Michael Waters, MD, PhD](https://radonc.wustl.edu/files/2024/07/Waters-Michael_RadOnc_01_cropped_web-280x386.jpg)
Michael Waters, MD, PhD
Assistant Professor of Radiation Oncology
Executive Assistant: Leigh Ann Zupan (lzupan@wustl.edu)
![Jeffrey F. Williamson, PhD, MD(hon), FAAPM, FACR, FASTRO](https://radonc.wustl.edu/files/2018/07/jeffreywilliamson-2enhgpp-280x386.jpg)
Jeffrey F. Williamson, PhD, MD(hon), FAAPM, FACR, FASTRO
Professor of Radiation Oncology
- Phone: 804-387-2512
- Email: jfwilliamson@wustl.edu
![Joanna C. Yang, MD, MPH](https://radonc.wustl.edu/files/2021/02/Yang-Joanna_Rad-Onc_04_web-280x386.jpg)
Joanna C. Yang, MD, MPH
Associate Professor of Radiation Oncology
Chief, Leukemia and Lymphoma Service
Director, Clinical Residency Program
- Phone: 314-362-8610
Executive Assistant: Christina Mossinghoff (cmossinghoff@wustl.edu)
![Jin Zhang, PhD, MPHS](https://radonc.wustl.edu/files/2018/07/zhang-jin-1nglr5u-280x386.jpg)
Jin Zhang, PhD, MPHS
Assistant Professor of Radiation Oncology
- Phone: 314-273-3278
- Email: jin.zhang@wustl.edu
![Tong Zhu, PhD, DABR](https://radonc.wustl.edu/files/2021/07/Zhu_Tong_web-280x386.jpg)
Tong Zhu, PhD, DABR
Associate Professor of Radiation Oncology
Chief, MRgRT Services
- Phone: 314-273-1447
- Email: zhut@wustl.edu
![Imran Zoberi, MD](https://radonc.wustl.edu/files/2018/07/imranzoberi-22i8mw1-280x386.jpg)
Imran Zoberi, MD
Professor of Radiation Oncology
Medical Director of Radiation Oncology, Siteman Cancer Center at Barnes-Jewish West County Hospital
- Phone: 314-362-8610
Executive Assistant: Nicole Castleberry (nicole.c@wustl.edu)
![Jacqueline Esthappan Zoberi, PhD](https://radonc.wustl.edu/files/2018/07/jacquelinezoberi-165lbpg-280x386.jpg)
Jacqueline Esthappan Zoberi, PhD
Professor of Radiation Oncology
Chief, Brachytherapy Medical Physics Service
- Phone: 314-362-8610
- Email: jzoberi@radonc.wustl.edu