Dr Kerry Callahan is the only doctor that I have been angry at. He is an awful doctor who is cold and completely unable to muster true care for his patients. He would rather think that I had hypochondria than realizing he should test me for my allergies again, the doctor right after him realized that I was allergic to over 70 items on varying levels of severity. Doctor Callahan gave up on me, and told me to try stopping my asthma meds because he didn't think I had asthma. Since then, I re tested my asthma, and my doctor now says that if I had taken his advice, I would've gone to the hospital. Doctor Callahan is a hazard to people he sees as beneath him.