Toxicology Expert Witnesses in California

The SEAK Expert Witness Directory contains a comprehensive list of toxicology expert witnesses who testify, consult and provide litigation support on toxicology and related issues. Toxicology expert witnesses and consultants on this page may form expert opinions, draft expert witness reports, and provide expert witness testimony at deposition and trial. The issues and subjects these toxicology expert witnesses testify regarding may include: Toxicology, Drug Testing, Alcohol, Alcohol Testing, Chemical Exposures, Chronic Pain, Disability, Drug Impairment, Fentanyl, Fitness For Duty, Laboratory Medicine, Marijuana, Methamphetamine, Mold, and Pulmonary Disease.

Use the search box above to further refine your search for toxicology expert witnesses by keyword and state. Attorneys contact the experts directly – with no middleman.

Jenifer S. Heath, Ph.D.

Toxicology, Environmental - Public Health, Chemical Products Liability, Mining, Toxic Chemical Exposure, Lead Poisoning, Hydrogen Sulfide, Health Impact Assessment (HIA), Consumer Chemical Product Safety, Health Risk Assessment, Environmental Regulatory Agency Negotiations, Contaminated Properties, Superfund (CERCLA)
Toxicologist who helps attorneys understand potential health impacts or human health risks of chemical exposures. Deposed and testified at bench and jury trials. Lead paint, blood lead levels, environmental contamination, pesticides, animal health products, mammalian toxicology. Over 50 publications. Metals, solvents, organic chemicals, petroleum products, industrial chemical release. Superfund / CERCLA, RCRA, state voluntary closure. Registered Nurse (R.N.) licensed to practice in over a dozen states.

Manijeh Berenji

Board-certified Occupational Medicine Physician

Oxnard, California
Occupational Medicine, Toxicology - independent medical examination, workers compensation, disability, fitness for duty, chemicals, environmental exposures, risk assessment
Over 11 years of experience in Occupational and Environmental Medicine as well as Toxicology. Associate professor of Occupational and Environmental Medicine at UC Irvine School of Medicine and Program in Public Health. Certified medico-legal evaluator through the International Academy of Independent Medical Evaluators.

Nelhs Betancourt, MD, MPH, DABT, CHCQM, CIME

Nelhs Betancourt, M.D ., Inc.

Irvine, California
Occupational Medicine, Toxicology - Independent Medical Examiner, IME, Internal Medicine, Lung, Cancer, Sleep Apnea, Solvents, Chemical Exposures, Workers' Compensation, Bauxite, Toxicology, Diabetes, Stroke, Rheumatological Disorders, Osteoarthritis, Pulmonary Disease, Fit-For-Duty, Chronic Pain, Gastrointestinal Issues
Board Certified by the American Board of Internal Medicine, American Board of Toxicology, American Board of Independent Medical Evaluators, American Board of Quality Assurance Utilization Review Physicians, Board Certified Physician Advisor, Medical Review Officer, Certified Department of Transportation Medical Examiner, and certified in the use of the AMA Guides, for impairment determinations. Dr. Betancourt has numerous years of experience performing Independent Medical Evaluations (IME) within the scope of his credentials. His in-depth knowledge of Internal Medicine, Occupational Medicine, Biochemistry and Toxicology, provide a solid framework to thoroughly investigate and determine causation and/or formulate recommendations, for return to work, FMLA issues, or long/short term disability benefits. Dr. Betancourt has performed IMEs addressing Ehlers-Danlos, heart disease (chronic and acute), diabetes with complications, pulmonary disease, gastrointestinal disease, cancer, strok...

Nachman Brautbar, MD

Nachman Brautbar, MD, Inc.

Los Angeles, California
Internal Medicine, Toxicology - Nephrology, Occupational Medicine, Pharmacology - Clinical, Pulmonary Disease
Dr. Nachman Brautbar is a board-certified internist and nephrologist, with a specialization in toxicology. His list of past and present academic appointments include: Associate Professor of Pharmacology and Clinical Professor of Medicine at the University of Southern California, Keck School of Medicine. He specializes in the toxicological and internal medicine aspects of injury in the workplace and environment,product liability, personal injury and standard of care.

Lyle D. Burgoon, PhD, ATS

Raptor Pharm & Tox, Ltd

California
Toxicology, Environmental - Dram shop, DNA, Product Liability, Statistics, Drug Impairment, Chemical Impairment, Family Law, Due Diligence, Criminal, Civil, Drug Testing, Toxic Tort
Dr. Burgoon is an award-winning and Board Certified (Fellow, Academy of Toxicological Sciences) toxicologist and biostatistician. Dr. Burgoon has 10+ years of experience as a US Government toxicologist employed by the US Environmental Protection Agency (US EPA) and the US Army. Dr. Burgoon served as a senior leader in various roles from leading teams of biostatisticians and bioinformaticians in designing and analyzing toxicology studies, to supervising toxicologists and public health scientists in the development of toxicological and dose-response assessments in support of the US EPA Integrated Risk Information System (IRIS). At the US Army, Dr. Burgoon led classified and unclassified programs and projects with a focus on the effects of chemical, biological, radiological, nuclear, and high yield explosives (CBRNE) on human health, ecological and agriculture systems. Dr. Burgoon’s expertise is in pharmacology, toxicology, biostatistics, exposure modeling, causal analysis, risk asse...

Shaun D Carstairs, MD FACMT FACEP

Experienced emergency physician and toxicologist

San Diego, California
Emergency Medicine, Toxicology - toxicology, poisoning, overdose, drug abuse, drug withdrawal, alcohol, urine drug screen, marijuana, fentanyl, opioids, addiction, methamphetamine, medication errors, heart attack, stroke, trauma, myocardial infarction, pulmonary embolism, snake bites, sepsis
- Dual board-certified in emergency medicine and medical toxicology, actively practicing in both specialties - Fellow of the American College of Medical Toxicology (FACMT) and Fellow of the American College of Emergency Physicians (FACEP) - Bachelor of Science (BS) with honor from the California Institute Of Technology - Medical degree (MD) from the Uniformed Services University, the nation’s military medical school - Retired US Navy Captain with over 25 years of active duty service - Prior chief medical officer for the US Marine Corps’ 1st Marine Division - Prior residency program director and core faculty for a large emergency medicine residency program - Professor of Military & Emergency Medicine at the Uniformed Services University - More than 50 peer-reviewed publications, textbook chapters, and national/international presentations in the fields of medical toxicology and emergency medicine - Lecturer for the American College of Medical Toxicology’s board review course - Has per...

Paul Damian, PhD, MPH, DABT, ERT

Board Certified Toxicologist/European Registered.

Damian Applied Toxicology, LLC

California
Toxicology, Environmental - Evaluation of chemical risks to public health and the environment, toxicology, adverse effects of chemicals, drugs, and nutritional supplements. Proposition 65 compliance, indoor air and vapor intrusion, chemical contamination of food and dietary supplements, drug-induced liver toxicity
Dr. Damian is the Founder and Principal of Damian Applied Toxicology, LLC (DAT). He is a Board Certified Toxicologist (Diplomate of the American Board of Toxicology or DABT) and European Registered Toxicologist (ERT). He has a PhD in Toxicology and Pharmacology from the University of California-Davis, a Master of Public Health (MPH) in Environmental Health (Environmental Chemistry) from the University of Michigan and 40 years of experience in the quantitative evaluation of health risks related to all types of chemicals and exposure circumstances. DAT provides expert-level health risk assessment services related to chemically contaminated property, chemical exposures in the workplace, and chemical exposures from consumer products. Specialty areas include mine and smelter site health and ecological risk assessments, vapor intrusion and indoor air risk assessments related to solvent release, hazardous waste site risk assessments, workers' compensation cases, drug-induced liver toxicity...

Michael L Fischman, MD, MPH

Michael L. Fischman M.D. APC

Lafayette, California
Toxicology, Occupational Medicine - Mold, Carbon monoxide toxicity, benzene toxicity, cancer causation, occupational/environmental lung diseases, metals toxicity, indoor air quality/building associated illness, epidemiology, epidemiology (cancer), inhalation toxicity
Clinical Professor, Division of Occupational & Environmental Medicine, University of California San Francisco Consultant, Fischman Occupational & Environmental Medical Group Diplomate, American Board of Preventive Medicine in Occupational Medicine Diplomate, American Board of Internal Medicine Medical-legal consultant and expert witness in Occupational & Environmental Medicine and Toxicology Fellow, American College of Occupational and Environmental Medicine (ACOEM) Member, Board of Directors, American College of Occupational & Environmental Medicine (ACOEM), 2009 - 2015 Chair, ACOEM Council of Scientific Advisors, 2010-2022. Co-author, "Chemical Hazards of the Workplace", Van Nostrand Reinhold, 1991, among others. Co-author “Occupational Cancer ”,Current Occupational & Environmental Medicine, Ed.: J La Dou and R Harrison. Fifth Edition, New York: McGraw- Hill Companies, Inc., 2014 Resident, Internal Medicine, University of California San Francisco, 1979-1981, and Mt. Zion Hospital...

Mason D. Harrell, III, MD, MPH, FACOEM

San Diego, California
Occupational Medicine, Public Health - Chemical Exposures, Heat Injuries, Asbestos, Dust, Mold, Air Quality, Heavy Metals, Radiation, Toxicology, Fitness for Duty, Return to Work, Malingering, Stress, Violence, PTSD, Personal Injury, Disability, Chronic Pain, Telemedicine, Primary Care
Harvard Instructor of Physicians, Harvard-trained (Residency & MPH), double board-certified, full-time practicing physician in Occupational and Environmental Medicine, Public Health, and General Preventive Medicine. Medical expert work with the Massachusetts Institute of Technology (MIT), the World Health Organization (WHO), American College of Occupational and Environmental Medicine (ACOEM), and MDGuidelines®. Published original research on Long Term and Short Term Disability in ACOEM’s Journal of Occupational and Environmental Medicine and chapter author of Psychological Factors and Workforce Health in ACOEM’s Occupational Health Guide. Published with the World Health Organization in the Journal of Infectious Disease on Ebola infections in health care workers. His involvement in the coronavirus (COVID-19) response includes instructing medical, health, and safety professionals, creating policies and procedures, directing preventive medicine and public health, mitigating transmiss...

Michael J Kosnett, MD, MPH, FACMT

California
Toxicology, Occupational Medicine - Lead poisoning, cannabis, drug testing, alcohol, marijuana, environmental toxicology, occupational toxicology, arsenic poisoning, forensic toxicology, DUI, risk assessment, aviation toxicology, medical monitoring
2016 Recipient of the American College of Medical Toxicology Matthew J. Ellenhorn Award [career achievement award in recognition of “extraordinary contributions to the field of medical toxicology”] Diplomate, American Boards of Internal Medicine, Preventive Medicine (Occupational Medicine), and Medical Toxicology Active Medical Licensure in Colorado and California Professional activities have included: • Past President, American College of Medical Toxicology • Committee on Toxicology of the National Academy of Sciences • NIOSH Board of Scientific Counselors • CDC Advisory Committee on Childhood Lead Poisoning Prevention • EPA Science Advisory Board panels (lead in air, water, dust) • ATSDR expert panels (lead biomonitoring, hair analysis) • WHO consultant and temporary advisor (arsenic in drinking water, chelation of heavy metals) • Consultant to US Air Force Science Advisory Board (F-22) • Consultant to the US Navy Naval Air Systems Command (F-18) • US Army Public Health Command (c...

Dimi Maffia, PharmD, BCCCP

PharmD Consultation, Inc

San Diego, California
Pharmacology- Clinical, Pharmacist - Toxicology, Pharmacist Standard of Care (Critical Care, Emergency Medicine, Geriatrics), Adverse Drug Events, Drug-Drug Interactions, Medication Safety and Errors, Pharmacogenomics, Anticoagulation, Antiarrhythmics, Antibiotic Stewardship, Medication-Related Surgical Complications, Opioid Safety
I currently practice as an Acute Care Clinical Pharmacist Specialist at VA San Diego Health Care System, and I have practiced in clinical pharmacy at 6 different healthcare systems. I obtained a Doctor of Pharmacy degree in 2014 from the University of the Pacific and have been a registered pharmacist in California for 10 years. I completed 2 years of postgraduate pharmacy residency training at VA San Diego Health Care System, with the first year focusing on pharmacy practice in ambulatory care and inpatient hospital settings, including hospice and long-term care, and the second year specializing in critical care pharmacy. I am a Board Certified Critical Care Pharmacist (BCCCP) and have held additional specialty clinical pharmacist positions in emergency medicine and critical care. I have clinical research experience in healthcare institutions and the pharmaceutical industry, having collaborated to conduct phase 2, 3, and 4 clinical trials and retrospective chart review. I currently...

Othon J. Mena, M.D.

Thousand Oaks, California
Forensic Pathology, Forensic Medicine - Forensic pathologist, medical examiner, coroner, board certified, pathology, forensic medicine, autopsy, postmortem exam, wrongful death, sudden death, manner of death, cause of death, toxicology, medical record review, death certification, death investigation, medicolegal, injury, injurie
Certified by American Board of Pathology in Forensic, Anatomic and Clinical Pathology, California medical license, Experienced in criminal and civil testimony, Have performed more than 6,000 postmortem exams

Okorie Okorocha, M.S., M.S., ESQ.

Forensic Toxicologist & Pharmacologist.

TOXICOLAWGY.COM

Pasadena, California
Toxicology, Pharmacology- Clinical - Lab, Laboratory, Blood testing, Breath Testing, Hospital Testing, Alcohol Impairment, drug impairment, alcohol testing, drug testing, drug effects, drug levels, postmortem drugs, postmortem alcohol, forensic science, blood alcohol, blood drugs, urine testing, urine drug tests, urine alcohol tests
Forensic Toxicologist Okorie Okorocha is a Forensic Toxicologist and expert witness that is widely recognized in his field of work. He has obtained two Master’s Degrees in toxicology and pharmacology. Okorie has served as a forensic toxicology expert witness in more than 700 jury trials and has relevant experience in court as a laboratory testing, drug and alcohol expert witness, as well as in other areas of forensic toxicology. These trials include civil and criminal trials in military, state and federal courts. By ensuring that the jury understands the multifaceted nature of scientific concepts, Okorie has been able to successfully serve as an expert witness in 54 California counties, 23 U.S. states, and internationally in Germany and Japan. Toxicology Co-Counsel for Depositions and Cross Examination at trial Okorie Okorocha is a sought after by top law firms as a cross-examiner of scientific experts in depositions and at trial. As an attorney, he has been the first cha...

Howard S Robin, MD

LJ Pathology Consultants

La Jolla, California
Pathology, Forensic Pathology - Breast Cancer, Kidney Pathology, Toxicology, Liver Pathology, Blood Banking, Laboratory Medicine, Molecular Diagnostics, Immunology, Forensic Pathology, Autoimmune Diseases, Drugs of Abuse, Transfusion reactions, Opiates/opioids, Anatomic pathology, Clinical pathology, Immunopathology
40 years providing expert testimony in pathology cases. Extensive experience deposition and courtroom testimony. Autopsy experience coroner's office. 37 years of experience directing clinical and anatomic pathology laboratories in hospital and outpatient settings. Special focus blood banking, cancer diagnosis, toxicology, immunology, pharmacology including drugs of use and drugs of abuse.

Alan Wu, Ph.D.

University of California, San Francisco

Palo Alto, California
Toxicology, Pathology - Alcohol testing, Forensic drug testing, Postmortem toxicology, Laboratory medicine, Cardiac markers, Newborn screening testing, Methamphetamine, Fentanyl, Cocaine, Pain management
Member of the California Poison Control Center Medical Advisory Committee. Some high profile cases serving as a toxicology expert witness: https://www.foxla.com/news/amie-harwick-case-gareth-pursehouse-sentenced-hollywood-sex-therapist-killing https://www.encyclopedia.com/law/law-magazines/alex-kelly-rape-trials-1996-97 https://www.nytimes.com/2000/11/23/us/former-nurse-on-trial-in-patients-deaths.html
You can also find Toxicology Expert Witnesses in:
Alabama, Arizona, Arkansas, California, Colorado, Connecticut, District Of Columbia, Florida, Georgia, Illinois, Kentucky, Massachusetts, Michigan, Missouri, Nevada, New York, North Carolina, Ohio, Pennsylvania, Tennessee, Texas, Utah, Virginia, Washington, and Wisconsin