Forensic, General & Medical
Expert Witnesses

Allergen and Mold Exposure: Adverse Health Effects Expert Witness

Dr. John T. Chiu - Allergy Medical Group, Inc

Dr. John T. Chiu - Allergy Medical Group, Inc

400 Newport Center Drive, Suite 401
Newport Beach, California 92660

Phone(949) 644-1422
Fax (949) 644-1424

E-mail  Send an email

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Dr. John Chiu offers expert assessment on adverse health effects from allergen exposure as well as exposure to water damage and molds leading to the development or worsening of bronchial asthma, allergic rhinitis, hypersensitivity pneumonitis, allergic bronchopulmonary Aspergillosis, chronic sinusitis, and headaches are just some of the conditions.


Dr. John Chiu provides the following services: Examination and history-taking, Allergy skin testing, Pulmonary function test, Tympanograms, Methacholine inhalation challenge.

Litigation Support Services

Dr John Chiu provides unbiased and impartial expert testimony for plaintiff and defendants.

Areas of Expertise


Dr. John Chiu obtained both his bachelor degree in Chemistry and doctor of medicine degrees at the University of Vermont. His rotating internship and residency in Internal Medicine were completed at Marquette University (currently known as the Medical College of Wisconsin). His fellowship training in Allergy, Immunology, and Rheumatology was obtained at the Scripps Clinic and Research Foundation in La Jolla, California.

Consulting Practice

All States

More Information

About Dr. John Chiu, Expert Witness
Allergy & Health Questionnaire, Expert Witness
New Patient Questionnaire, Legal Consultant
Environmental Questionnaire, Expert Witness
Allergy Medical Group, Inc. Newsletters, Expert Witness
Contact Allergy Medical Group, Inc, Litigation Support

Professional Experience

He has served as a medical expert witness in more than 300 cases involving adverse health effects from exposure to water damage and molds; and testified in at least 6 trials.


He is certified by the American Board of Allergy and Immunology which is jointly sponsored by the American Board of Internal Medicine and the American Board of Pediatrics. He held a faculty appointment at the University of California at Irvine as Clinical Professor of Medicine for over 40 years.

Legal Experience & Services

Dr John Chiu has been represented in cases involving the plaintiffs as well as the defense. He has testified as a medical expert in the superior court in several counties in California on at least 6 occasions.


emeritus Fellow: American Academy of Allergy, Asthma, Immunology
emeritus Fellow: American College of Allergy, Asthma, Immunology

Awards & Honors

American Chemical Society-Freshman Chemistry Achievement Award
Am Academy of Allergy, Asthma, Immunology- Voluntary Clinical Faculty Award


He has published original research studies in nearly all of the major US medical journals including the Journal of the American Medical Association related to his specialty.

Professional References

Top Doctors and Top Physicians have listed him as one the nation's top allergist and top immunologist
Number 1 allergist/immunologist in


University of Vermont - BS Degree in Chemistry and Doctor of Medicine
Marquette University - Internship and Residency in Internal Medicine
Scripps Clinic & Research Foundation at La Jolla- Fellowship in Allergy, Immunology, and Rheumatology.

Articles Published by Dr. John T. Chiu - Allergy Medical Group, Inc

 Steps to Take before Proceeding on Legal Actions on Water Damage/Mold Exposure

From a medical expert witness' perspective, I believe certain preliminary steps a law firm should consider undertaking before taking on a client who claims to have suffered illnesses from water damage/mold exposure. This is not intended to offer any legal advice but suggestions which may help you to decide whether the case may be valid or not. Obviously the ultimate decision can only be made by your medical expert. Remember that not everyone who is exposed to water damage or molds gets ill.

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 Anaphylaxis, Potentially Deadly if Not Treated Properly and Promptly

Anaphylaxis comes on very suddenly and death may be the consequence if it is not recognized or treated promptly. The most effective medication to treat it is epinephrine and not , as often erroneously believed, antihistamine. People with this problem should wear a MediAlert ID to signal this condition to emergency medical personnel since just minutes of delay may mean the difference of life or death.

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 Water Damage and Mold Exposure, Hazards to Health

Exposure to water damage can cause illnesses and distressing symptoms in susceptible individuals. Some of the problems are of an allergic or immunologic nature, some from the irritant effects of microbial volatile organic compounds ,but the causes for many other symptoms remain unknown.

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