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American College of Medical Toxicology
Board of Directors

Louise Kao, MD, FACMT

Indiana University School of Medicine
Indianapolis, IN
President (2021-2023)

KAO 2012for website2.jpgDr. Kao received her medical degree from Rush Medical College in Chicago, where she worked as a Poison Information Specialist (PIS) at the Chicago Poison Center under the medical direction of Dr. Jerrold Leikin. Dr. Kao went on to complete residency in Emergency Medicine and a Medical Toxicology Fellowship at Indiana University/Methodist Hospital in Indianapolis. She is board certified in Emergency Medicine and Medical Toxicology. Dr. Kao currently serves as the IU Medical Toxicology Fellowship Director as well as the Director of the Medical Toxicology rotation for residents and students in addition to her clinical Emergency Medicine and Toxicology duties. She is an Associate Professor of Clinical Emergency Medicine at the IU School of Medicine. Her vision for the future involves expanding the visibility and reach of Medical Toxicology across disciplines.

Anthony Pizon, MD, FACMT

UPMC Presbyterian
Pittsburgh, PA
Vice President (2021-2023)

Pizon 125wDr. Pizon currently serves as the Chief of the Division of Medical Toxicology and as Director of the Medical Toxicology Fellowship. He received his medical degree at the Medical College of Ohio in 2001. He completed his Emergency Medicine Residency at the University of Pittsburgh Medical Center in 2004 and completed his medical toxicology fellowship training at Banner Good Samaritan Medical Center in Phoenix, Arizona in 2006. Dr. Pizon is board-certified in Emergency Medicine, Medical Toxicology and Addiction Medicine. His current research interests include the novel pharmaceutical management of withdrawal syndromes, the evaluation of cost effective care provided by medical toxicologists, and biomarkers of hepatic injury after acetaminophen toxicity. However, his real passion lies in the education of fellows, residents, and medical students. 

Ziad Kazzi, MD, FACMT

Georgia Poison Center / Emory University
Atlanta, GA
Secretary / Treasurer (2021-2023) 

boardmembers/Kazzi_Photo.JPGRaised in Beirut, Lebanon, Dr. Kazzi trained in Emergency Medicine at Emory University in Atlanta. He served as a Chief Resident before completing a subspecialty fellowship in Medical Toxicology at Emory University and the Centers for Disease Control & Prevention (CDC) in Atlanta. He is board certified in both Emergency Medicine and Medical Toxicology. From 2005-2008, Dr. Kazzi joined the Department of Emergency Medicine at the University of Alabama at Birmingham (UAB) where he served as a Medical Toxicologist for the Regional Poison Control Center in Birmingham and the Alabama Poison Center. Currently, he is an Associate Professor at the department of Emergency Medicine and the Director of the International Toxicology Postdoctoral Fellowship Program at Emory University. He is also the Assistant Medical Director of the Georgia Poison Center and a Guest Researcher at the CDC National Center of Environmental Health. As an emergency physician and toxicologist, Dr. Kazzi specializes in the recognition, triage and management of poisonings and holds a deep interest in the areas of Radiation and International Toxicology. He is also currently serving as the President of the Middle East & North Africa Clinical Toxicology Association whose mission is to advance the care of poisoned patients and prevent poisonings in the MENA region.

Michelle Ruha, MD, FACMT

Banner—University Medical Center Phoenix
Phoenix, AZ
Past President (2021-2023)

boardmembers/Ruha_Michelle_2021.jpgDr. Ruha received her medical degree from UMDNJ New Jersey Medical School and then completed an Emergency Medicine residency at Morristown Memorial Hospital in New Jersey. Her fellowship training brought her to Phoenix, Arizona, where she served as Director of the Medical Toxicology Fellowship at Banner Good Samaritan Medical Center from 2005 to 2017. She is now Vice-Chief of the Department of Medical Toxicology at Banner – University Medical Center Phoenix and Section Chief for Addiction Medicine. Dr. Ruha is Board Certified in Emergency Medicine, Medical Toxicology, and Addiction Medicine, with her clinical practice focused on the care of patients with medication or venom toxicity as well as substance use disorders. She is a Clinical Professor with the Department of Emergency Medicine at the University of Arizona College of Medicine Phoenix. Her primary research interests include North American snake and scorpion envenomations, and she is the Principal Investigator for the ACMT North American Snakebite Registry. She has been a member of the Board of Directors of the American College of Medical Toxicology since 2009.

Maryann Amirshahi, PharmD, MD, MPH, FACMT

MedStar Washington Hospital Center
Children’s National Medical Center
Washington, DC
(Term 2: 2022-2025)

Mazer_Amirshahi sm.jpg

Dr. Amirshahi completed her BS in pharmacy and PharmD at the University of the Sciences in Philadelphia, followed by medical school at Temple University. She completed emergency medicine residency at the University of Pennsylvania, medical toxicology fellowship at the George Washington University, and clinical pharmacology fellowship at Children’s National Medical Center. She received an MPH from the George Washington University with a concentration on environmental and occupational health. She is board certified in emergency medicine, medical toxicology, addiction medicine, and clinical pharmacology. She is currently an Associate Professor of Emergency Medicine at the Georgetown University School of Medicine and practices clinically at MedStar Washington Hospital Center and Children’s National Medical Center in Washington, DC. She serves as a toxicology consultant for the Mid-Atlantic Center for Children’s Health and the Environment and the National Capital Poison Center. Her research interests focus on medication safety, prescription drug shortages, drug therapy in emergency medicine, and prescription drug abuse.

Diane Calello, MD, FACMT

New Jersey Poison Information and Education System
Rutgers Biomedical and Health Sciences
Newark, NJ
(Term 2: 2020-2023)

boardmembers/Calello_Diane_2018.jpegDr. Calello, a New Jersey native and devotee, received her BA from the College of William and Mary and her MD from New Jersey Medical School. She completed residency training in pediatrics, and fellowship training in both pediatric emergency medicine and medical toxicology at the Children’s Hospital of Philadelphia and Poison Control Center in Philadelphia. Dr. Calello is board certified in pediatrics, pediatric emergency medicine, medical toxicology, and addiction medicine. She is currently the Director of Medical Toxicology at Morristown Medical Center and a toxicologist at the New Jersey Poison Information and Education System (NJPIES). She has lectured and published on various facets of clinical toxicology, particularly as it pertains to extracorporeal treatment, intravenous lipid emulsion, and poisoning in the young child.

Christina Hantsch, MD, FACMT

Chicago, IL
(Term 1: 2021-2024)

boardmembers/Hantsch_Christina.jpgDr. Hantsch is a graduate of the Honors Program in Medical Education at Northwestern University. She completed an emergency medicine residency, including a year as chief resident, at the Medical College of Wisconsin and then continued her training in a medical toxicology fellowship at Vanderbilt University. After her fellowship, she returned to the Chicago area and is currently Professor of Emergency Medicine and Director of the Division of Toxicology in the Department of Emergency Medicine at the Loyola University Chicago Stritch School of Medicine. Dr. Hantsch served for more than 8 years as medical director of the Illinois Poison Center. For nearly 20 years, she has been teaching residents and students in the emergency department as well as on the inpatient toxicology clinical service which she established at Loyola. In addition, she is a regular organizer and contributor to local, regional, and national/international continuing education programs.

Bryan Judge, MD, FACMT

Spectrum Health Medical Group
Grand Rapids, MI
(Term 2: 2020-2023)

Judge_Photo.jpgDr. Judge graduated from Wayne State University School of Medicine and the GRMEP Emergency Medicine Residency Program. Following graduation, he completed a fellowship in medical toxicology at Indiana University in Indianapolis. Dr. Judge has served in a number of faculty roles before becoming the Program Director of the Emergency Medicine Residency Program. The interface with people that occurs during his job has been essential in providing him with much satisfaction and keeps ignited his passion for 'what he does' and 'why he does it'. He enjoys going to work every day and connecting with faculty, medical students, and residents in order to deliver compassionate and quality care for patients. He has four children and his spare time is spent with family and friends. He enjoys cooking, erging, hunting, rowing and writing. His next academic accomplishment is to complete a master's degree in health professions education in order to keep bringing innovative educational ideas and methods to the program.

Joshua King, MD, FACMT

University of Maryland Medical System
Baltimore, MD
(Term 1: 2022-2025)


Josh King is a clinician-educator nephrologist and medical toxicologist with clinical interests in nearly all things involving both tox and kidney, extracorporeal treatment of poisonings, ICU nephrology, and medical education. Dr. King received his medical education from Penn State College of Medicine and completed internal medicine residency and chief residency at the University of Virginia. He completed a nephrology fellowship at Johns Hopkins Hospital, and after returning to the University of Virginia as a nephrologist, completed a medical toxicology fellowship there. He is presently Assistant Professor of Medicine and Pharmacy at the University of Maryland, the medical director of the Maryland Poison Center, and the program director of the University of Maryland Nephrology Fellowship. Dr. King's research interests are (unsurprisingly) largely focused on where nephrology and toxicology meet, such as extracorporeal removal of toxins and poisoning in patients with kidney disease.

Mark Mycyk, MD, FACMT

Cook County Health
Chicago, IL
(Term 1: 2021-2024)

boardmembers/Mycyk_Mark.jpgDr. Mycyk found his way to medicine after obtaining a degree in English and American Literature from Harvard University. He completed a residency in emergency medicine at Boston City Hospital/Boston Medical Center, a fellowship in medical toxicology at the Toxikon Consortium and Cook County Hospital in Chicago, and currently serves as the Research Director at the Toxikon Consortium. His current scholarly work focuses on NEW (non-traditional, emerging, and web-based) drugs of abuse and innovative ways of disseminating scholarship.



Ayrn O’Connor, MD, FACMT

Banner—University Medical Center Phoenix
Phoenix, AZ
(Term 2: 2020-2023)

O'Connor 2018.jpgDr. O'Connor currently serves as the Associate Fellowship Director at Banner—University Medical Center in Phoenix, Arizona. She actively participates in the graduate medical education of medical students, residents and fellows as well as providing clinical care for the patients encountered through a busy admitting and consulting medical toxicology service. She holds an appointment as Associate Professor in Emergency Medicine at the University of Arizona—College of Medicine where she is active in providing the pharmacology curriculum to the first, second and third year medical students. Furthermore, she is responsible for the fourth year medical student and resident toxicology elective offered at Banner—University Medical Center. She graduated from Franklin College in 1996 with a bachelor’s degree in Chemistry. In 2000, she earned her M.D. from Indiana University School of Medicine. She completed her residency and fellowship at Indiana University in Emergency Medicine and Toxicology in 2003 and 2005, respectively. Dr. O’Connor joined the faculty at Banner—University Medical Center in 2005 as a clinical toxicologist and educator and is board certified in emergency medicine and toxicology. 

Evan Schwarz, MD, FACMT

Washington University School of Medicine
St. Louis, MO
(Term 2: 2022-2025)

Schwarz_Photo_sm.jpgDr. Schwarz attended medical school at the University of Texas Medical Branch in Galveston, Texas before completing a residency in Emergency Medicine at Washington University School of Medicine in Saint Louis, Missouri.  After residency, he completed a fellowship in Medical Toxicology at the University of Texas Southwestern School of Medicine in Dallas, Texas before returning to Missouri as an Assistant Professor of Emergency Medicine at Washington University School of Medicine. Since returning to Missouri, he has become board certified in Addiction Medicine. Currently, he is the Medical Toxicology Fellowship Director and co-director of the Medical Toxicology and Addiction Medicine Clinic.  In addition, he is the director of the medical student and resident rotations. He is also very active in ACMT and is an active member of multiple committees. He is also involved at the medical school as one of 3 Advisory Deans in the Office of Student Affairs and has been on the Board of Directors for the Missouri College of Emergency Physicians since 2012.

Andrew Stolbach, MD, MPH, FACMT

Johns Hopkins Hospital
Baltimore, MD
(Term 2: 2021-2024)

Stolbach.jpgDr. Stolbach is Board Certified in Emergency Medicine and Medical Toxicology. He serves as a consultant to the Maryland Poison Center, is a member of the Johns Hopkins Hospital P&T Committee, and is a Johns Hopkins IRB co-Chair.

He was a Magna cum laude graduate of Pennsylvania State University with a Bachelor’s of Science in Life Science along with a minor in history. He furthered his education at the University of Maryland, School of Medicine and received his Doctorate of Medicine Degree in 2002. Dr. Stolbach completed his Emergency Medicine Residency at St. Luke’s Roosevelt Hospital Center in New York City from 2002-2005 where he was Chief Resident. He completed his Fellowship in Medical Toxicology at Bellevue Medical Center and New York University School of Medicine.

Dr. Stolbach has received Honors and Awards including: The University Honors Medal for Scholarship in History (1998); Phi Beta Kappa Honor Society (1998); a 2010 ACMT/McNeil Products Award for Acetaminophen-Related Research and a grant from ATSDR for Airborne Particulate Matter Education. He is recognized as a Fellow of the American College of Emergency Medicine, American College of Medical Toxicology, and American Academy of Clinical Toxicology.

Dr. Stolbach has developed a 10-part online toxicology training program that is currently being used by a number of emergency medicine residency programs. He has also created toxicology webinars and online modules for the American College of Medical Toxicology and United States ATSDR. He is currently writing a opioid prescribing teaching module for emergency and primary care providers.

Dr. Stolbach has multiple publications to his credit and many accomplishments and accreditations in his career including: In 1998, Dr. Stolbach was the Northeast Regional Greco-Roman Wrestling, Silver Medalist; In 2001, he completed the Marine Corps Marathon; In 2003, 2004, and 2006 he completed the New York City Marathon; In 2005, he completed the Baltimore Marathon. 

Paul Wax, MD, FACMT

University of Texas, Southwestern School of Medicine
Dallas, Texas
ACMT Executive Director 


Dr. Wax is the Executive Director of the American College of Medical Toxicology. He received his B.A from Dartmouth College, his M.D. from the Mount Sinai School of Medicine, his Emergency Medicine training at the UCLA Hospitals, and his Medical Toxicology training at Bellevue Medicine Center / New York University. He is Board-certified in both Medical Toxicology and Emergency Medicine, and is a Fellow of the American College of Medical Toxicology. 

Along with his full time position as the Executive Director of ACMT, Dr. Wax is an Adjunct Professor in Emergency Medicine (Medical Toxicology) at UT Southwestern School of Medicine where he has been on faculty since 2006. Previously Dr. Wax had faculty appointments in the Departments of Emergency Medicine at the University of Rochester School of Medicine from 1991-2001 and the University of Arizona School of Medicine from 2001-2006. Dr. Wax previously served on the Board of Directors of ACMT from 1998-2008 serving as ACMT President from 2006-2008. From 1997-2006 Dr. Wax also served as one of the American Board of Emergency Medicine’s appointee’s on the Medical Toxicology Subboard. During this time Dr. Wax served as Editor of the Medical Toxicology Board Certification Examination as well as Chairman of the Subboard, and was also the primary author of the 2004 Core Content of Medical Toxicology.

Dr. Wax who became ACMT’s first Executive Director in 2008 has directed over $10,000,000 in federally funded programs for ACMT, and, as of 2021, is directing ACMT programs funded by NIH, FDA, CDC and SAMHSA. Dr. Wax is the Co-Principal Investigator of ACMT’s Toxicology Investigator Consortium (ToxIC), a 35 site multicenter research program, and is the author of more than 100 peer reviewed publications. In 2019 Dr. Wax was honored with ACMT’s Career Achievement award.


Board Interns (2022 - 2023)


Sonya Rashid, MD
Toxikon Consortium
Chicago, IL

Member_Profile_Photos/Michael Semple

Michael Semple, DO
Washington University
Saint Louis, MO

Member_Profile_Photos/Michael Simpson

Michael Simpson, MD
Boston Children's Hospital
Boston, MA


Past Board Members of ACMT

Cynthia Aaron, MD (1999-2003)

Steven Aks, DO (2010-2016)

A. Nelson Avery, MD (2014-2015)

William Banner, MD (1993-1996); President (1993-1994)

Stephen Borron, MD (2004-2006)

Leslie Boyer, MD (1993-1998)

Jeffrey Brent, MD (2007-2009)

Keith Burkhart, MD (1996-2008); President (2004-2006)

Michele Burns, MD (2011-2016)

G. Patrick Daubert, MD (2012-2015)

J. Ward Donovan, MD (1993-2000); President (1996-1998)

Leslie Dye, MD (2001-2003; 2009-2019); President (2014-2016)

Daniel Goldstein, MD (2007-2009)

Howard Greller, MD (2009-2011)

Christine Haller, MD (2005-2007)

Fred Henretig, MD (1995-2000)

Robert S Hoffman, MD (1993-2002); President (2000-2002)

David Juurlink, MD (2018-2021)

William Russ Kerns III, MD (2012-2018)

Mark Kirk, MD (2007-2008)

Michael Kosnett, MD (1996-2006); President (2002-2004)

Eric Lavonas, MD (2012-2015)

Erica Liebelt, MD (2000-2012); President (2008-2010)

Thomas Martin, MD (1999-2004)

Charles McKay, MD (2007-2021); President (2016-2019)

Stephen Munday, MD (2010-2015)

Lewis Nelson, MD (2003-2014); President (2010-2012)

Kent Olson, MD (1993-1998)

Kevin Osterhoudt, MD (2004-2006)

Paul Pentel, MD (1993-1998); President (1994-1996)

Dan Rusyniak, MD (2010-2011)

Steven Seifert, MD (2005-2007)

Michael Shannon, MD (1993-2002); President (1998-2000)

Curtis Snook, MD (2002-2004; 2008-2010)

Dan Sudakin, MD (2015-2016)

Paul Wax, MD (1999-2008); President (2006-2008)

Suzanne White, MD (2005-2016); President (2012-2014)

Timothy Wiegand, MD, FACMT (2014-2022)


Past Board Interns  

Marielle Brenner, MD, Indiana University School of Medicine, Indianapolis, IN (2021-2022)

Aaron Frey, DO, University of Virginia, Charlottesville, VA (2021-2022)

Christopher Meaden, MD, Rutgers New Jersey Medical School (2020-2021)

Michelle Geyer Thompson, DO, Banner - University Medical Center Phoenix (2020-2021)

Charlotte Goldfine, MD, University of Massachusetts, Worcester, MA (2019-2020)

Michael Hayoun, MD, UC Davis Health, Sacramento, CA (2019-2020)

Ryan Marino, MD, University of Pittsburgh Medical Center, Pittsburgh, PA (2018-2019)

Brian Patrick Murray, DO, Emory University School of Medicine, Atlanta, GA (2018-2019)

Hannah Malashock, MD, Banner University Medical Center, Phoenix, AZ (2017-2018)

Sarah Shafer, MD, University of Texas Southwestern, Dallas, TX (2017-2018)

Henry Swoboda, MD, Toxikon Consortium, Chicago, IL (2016-2017)

Kevin F. Maskell, Jr., MD, Virginia Commonwealth University Health System (2015-2016)

Robert Bassett, DO, Albert Einstein Medical Center (2014-2015)

Katherine Boyle, MD, University of Massachusetts Medical (2014-2015)

Dazhe James Cao, MD, Rocky Mountain Poison and Drug Center-Denver Health (2014-2015)

Jennifer Carey, MD, University of Massachusetts Medical School (2013-2014)

Melissa Halliday, DO, Emory University School of Medicine (2013-2014)

Kathryn Kopec, DO, Albert Einstein Medical Center (2012-2013)

Tayler Schwartz, Brown University (2011-2012)