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Dr. Christopher Chang is a private practice otolaryngology, head & neck surgeon specializing in the treatment of problems related to the ear, nose, and throat. Located in Warrenton, VA about 45 minutes west of Washington DC, he also provides inhalant allergy testing/treatment, hearing tests, and dispenses hearing aids. He is also the chief medical officer of O2Labz, a medical and scientific 3D animation company.Google+ Christopher Chang, MD Bio