> Faculty & Developers


The following faculty direct the Environmental Medicine Modules Program.  The faculty are board certified and fellowship trained physician medical toxicologists who are members of the American College of Medical Toxicology (ACMT) and have extensive experience directly caring for patients suffering from the ill effects of chemical agents and poisons.  
Michael Kosnett, MD, MPH
Associate Clinical Professor
Division of Clinical Pharmacology and Toxicology
University of Colorado School of Medicine
Adjunct Associate Professor
Environmental & Occupational Health
Colorado School of Public Health
Denver, CO
Dr. Kosnett is a medical toxicologist and occupational medicine specialist with a clinical and research interest in the toxicology of lead and other heavy metals. He is a member of the CDC Advisory Committee on Childhood Lead Poisoning Prevention, the US EPA Science Advisory Board lead review panels on lead in air, water, and dust, and a member of the NIOSH Board of Scientific Counselors. He has been a longtime consultant to the California Department of Public Health Occupational Lead Poisoning Prevention Program, and currently participates on the CalOSHA Advisory Committee for Revising the Occupational Exposure to Lead Requirements. 
Charles A. McKay, MD
Charles A. McKay, MD, FACMT
Associate Professor of Emergency Medicine
University of Connecticut School of Medicine
Hartford, CT
Dr. McKay is a medical toxicologist at Hartford Hospital and the University of Connecticut School of Medicine, where he is an associate professor of Emergency Medicine.  His primary training and boards are in Internal Medicine (1986) and Emergency Medicine (1989).  Dr. McKay is a diplomat of the ABMT (1991) and the ABEM Toxicology Subboard (1998).   He is the Associate Medical Director of the Connecticut Poison Control Center and the director of the Toxicology Fellowship at UConn which has consultation services at three hospitals and participate in opioid surveillance and medication safety activities. As Medical Director of Occupational Health Services and Medical Review Officer for Hartford Hospital and the Connecticut Children's Medical Center, he evaluates questions of workplace safety and toxic exposure for over 9,000 employees.

Paul M. Wax, MD

Paul M. Wax, MD, FACMT
Clinical Professor of Surgery, Emergency Medicine
University of Texas, Southwestern School of Medicine
Dallas, TX
Dr. Wax is a medical toxicologist and has served as the Executive Director of the American College of Medical Toxicology (ACMT) since 2008. He is Clinical Professor of Surgery (Emergency Medicine/Medical Toxicology) at the University of Texas, Southwestern, Dallas, TX. As a consultant to the Chemical Security Analysis Center he provides assistance in completing chemical terrorism risk assessments. He is also co-program leader on a cooperative agreement with the Agency for Toxic Substances Disease Registry (ATSDR/CDC) to provide education on environmental toxicology to toxicologists and other health care providers. As Executive Director at ACMT he provides daily management of the association's varied outreach and educational activities.

Subject Matter Experts

The following Subject Matter Experts have developed courses within the Environmental Medicine Modules Program.  Each expert brings extensive knowledge and experience about environmental toxicology to the Program.


Michael Abesamis, MD
Assistant Professor
University of Pittsburgh, School of Medicine
Pittsburgh, PA
Dr. Abesamis serves as the co-director of the West Virginia Poison Center and the associate medical director for the Pittsburgh Poison Center. He also oversees the Medical Toxicology Outpatient Clinic in UPMC Presbyterian Hospital's Emergency Department. There, he evaluates and treats people who are exposed to chemicals and solvents in the home or workplace. Abesamis is currently completing his master's degree in public health with a strong interest in occupational and environmental exposures.
Dr. Abesamis developed Toxicology of Hydraulic Fracturing with Dr. Anthony Pizon.
Eric Amster, MD, MPH
Visiting Scientist, Department of Environmental Health, Harvard School of Public Health
Department of Environmental Health, Haifa University School of Public Health
Institute of Occupational and Environmental Medicine, Rambam Medical Center
Technion Center of Excellence in Exposure Science and Environmental Health
Dr. Amster is a specialist in environmental and occupational medicine; his research primarily focuses on occupational and environmental exposure to particulates and heavy metals. He completed his undergraduate and medical studies at the University of California, Berkeley and Davis and has a master's degree in Environmental Health at the Harvard School of Public Health where he also completed clinical training in Occupational and Environmental Medicine.  While at Harvard he was a Zuckerman Fellow at the Center for Public Leadership of the Harvard Kennedy School.  Dr. Amster was a Fulbright Scholar, conducting environmental epidemiology research in Israel.   He is on faculty in the Department of Environmental Health at the Haifa University School of Public Health, teaches at the Hebrew University School of Public Health, and is a visiting scientist at the Harvard School of Public Health.
Patrick N. Breysse, PhD
Johns Hopkins, Bloomberg School of Public Health
Baltimore, MD
Dr. Breysse is the Director of the ABET accredited Occupational and Environmental Hygiene Academic Program. He is also the Co-Director Center for Childhood Asthma in the Urban Environment. Dr. Breysse's research currently includes studies of the impact of indoor and outdoor air pollution on respiratory health including childhood asthma, chronic obstructive pulmonary disease, and respiratory tract infections.  He also directs a second secondhand smoke (SHS) exposure assessment laboratory and conducts SHS exposure studies around the world in support of tobacco control policy development. Dr. Breysse is collaborating on complex health and exposure studies around the world including studies in Peru, Nepal, Mongolia, Columbia, and India.  In addition, Dr. Breysse collaborates with colleagues in Material Sciences and Engineering on the development of novel sensor technology using organic semiconductors.  
Dr. Breysse developed Particulate Matter and Public Health with Dr. Andrew Stolbach and Mr. Ronald White.
Timur S. Durrani, MD, MPH, MBA
Clinical Instructor of Medicine
University of California
San Francisco, CA

Dr. Durrani holds appointments in the Department of Medicine, Division of Clinical Pharmacology and Experimental Therapeutics and Department of Family Medicine. He holds dual board certifications in Family Medicine and Preventive Medicine, and is a graduate of the UCSF Occupational and Environmental Medicine Residency and the UCSF Medical Toxicology Fellowship.  As a consultant for the Medical Toxicology Service, he provides clinical care for acutely poisoned patients at the San Francisco General Hospital, as well as outpatient Medical Toxicology consultations through the UCSF Occupational and Environmental Medicine Faculty Practice. He serves as Medical Toxicology consultant in Region 9 for the Agency for Toxic Substances and Disease Registry and the Environmental Protection Agency. 

Dr. Durrani has experience in caring for populations both domestically and internationally, having volunteered in multiple countries and as a Preventive Medicine Officer with the U.S. Army in Afghanistan. His academic interests include occupational and environmental toxicology, reproductive toxicology, pediatric toxicology and clinical pharmacology.

Dr. Durrani developed Taking an Exposure History.


Mary A. Fox, PhD, MPH
Assistant Professor
Department of Health Policy and Management
Johns Hopkins, Bloomberg School of Public Health
Baltimore, MD

Dr. Fox is a risk assessor with doctoral training in toxicology, epidemiology and environmental health policy. She is a core faculty member of the Hopkins Risk Sciences and Public Policy Institute where she teaches the methods of quantitative risk assessment. In her research, she evaluates the health risks of exposure to multiple chemical mixtures.

Dr. Fox developed Endocrine Disruptors with Dr. Andrew Stolbach.



Jerrold B. Leikin, MD
Emergency Medicine
NorthShore University HealthSystem
Chicago, IL
Dr. Leikin runs one of the only dedicated comprehensive toxicology programs in the country.  He has written textbooks for toxicology used throughout the country and internationally, is the editor of multiple bioterrorism textbooks, and has published hundreds of peer-reviewed publications.  He is also the senior editor for the monthly primary care journal Disease-A-Month.  
As one of the initial medical directors of the Illinois Poison Center, Dr. Leikin continues his active involvement in teaching residents and fellows.  Dr. Leikin holds dual professorship at Northwestern Memorial Hopsital and Rush Presbyterian St. Lukes in Chicago.
Dr. Leikin developed Reproductive Toxicology.
Anthony Pizon, MD
Anthony Pizon, MD, FACMT
Assistant Professor
University of Pittsburgh, School of Medicine
Pittsburgh, PA

Dr. Pizon is an Assistant Professor in the Department of Emergency Medicine, Division of Medical Toxicology at the University of Pittsburgh, School of Medicine. He serves as Medical Director of the West Virginia Poison Center and Fellowship Director of the Medical Toxicology Fellowship at the University of Pittsburgh Medical Center.

Dr. Pizon 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 both Emergency Medicine and Medical Toxicology. 

Dr. Pizon developed Toxicology of Hydraulic Fracturing with Dr. Michael Abesamis.


Cyrus Rangan, MD, FACMT
Medical Toxicologist
Los Angeles County Department of Public Health
Los Angeles, CA
Dr. Rangan is a pediatrician and medical toxicologist. Dr. Rangan serves as the Assistant Medical Director with the California Poison Control System and medical toxicology consultant for Children’s Hospital Los Angeles.
Dr. Rangan developed Pediatric Asthma and Environmental Exposures.


Daniel L. Sudakin, MD, MPH
Associate Professor
Environmental Health Science Center
Oregon State University
Corvallis, OR
Dr. Sudakin is a medical toxicologist with training and experience in addiction medicine as well as occupational, environmental, and pharmaceutical toxicology. Dr. Sudakin's research and outreach activities include support for the National Pesticide Information Center, which is a cooperative agreement between Oregon State University and the U.S. E.P.A. Office of Pesticide Programs. 

Dr. Sudakin is Co-Director of the Integrative Health Science Facility Core of the Environmental Health Science Center at Oregon State University where he provides support for the design and execution of clinical and translational research in the environmental health sciences.  Current research activities include the application of geographic information systems and spatial scan statistics in the surveillance and prevention of pesticide exposures.

Dr. Sudakin is leader of the Research Translation Core for the OSU Superfund Research Program, which is focused on polycyclic aromatic hydrocarbons.   The Research Translation Core communicates the Superfund Research Program findings in ways that are meaningful to stakeholders including public health and regulatory agencies, high-risk populations, and the general public.

Dr. Sudakin developed Pesticide Residues in the Indoor Environment.
Andrew I. Stolbach, MD, FACMT
Attending Physician, Emergency Department
Johns Hopkins Hospital
Baltimore, MD
Dr. Stolbach is board certified in medical toxicology and emergency medicine. He is a member of the faculty at Johns Hopkins University School of Medicine and sits on the Pharmacy and Therapeutics Committee of Johns Hopkins Hospital. He  is a Consultant to the Maryland Poison Center.  
Dr. Stolbach developed Endocrine Disruptors with Dr. Mary Fox and he developed Particulate Matter and Public Health with Dr. Patrick Breysse and Mr. Ronald White.  In addition, Dr. Stolbach was the subject matter expert for Understanding and Utilizing the Environmental Public Health System.

David Vearrier, MD, MPH
Division of Medical Toxicology
Drexel University College of Medicine

David Vearrier, MD, MPH, is dual board certified in emergency medicine and medical toxicology. He sees patients in Center City Philadelphia. At Hahnemann University Hospital, Dr. Vearrier serves on the Pharmacology and Therapeutics Committee and the Graduate Medical Education Committee.

Dr. Vearrier developed Environmental Exposures and Cancer.


Ronald White, MS
Director of Regulatory Policy
Center for Effective Government
Washington, DC
Mr. White's expertise focuses on the application of scientific information in the development and implementation of public health policy, with specific interests including air pollution policy, chemical and nanotechnology risks, and environmental justice.,
Mr. White also serves as part-time faculty in the Department of Environmental Health Sciences at the Johns Hopkins Bloomberg School of Public Health.  Previously, he served as Associate Scientist in the Department of Health Policy and Management, with joint appointments in the Departments of Environmental Health Sciences and Epidemiology, at Johns Hopkins, where he also served as Deputy Director for the Johns Hopkins Risk Sciences and Public Policy Institute.
Mr. White developed Particulate Matter and Public Health with Dr. Andrew Stolbach and Dr. Patrick Breysse.