Allergy Testing


An allergic reaction occurs when the immune system produces chemicals called histamines to fight off allergens. Many common substances can be triggers, including pollen, food, mold, dust, feathers, animal dander, chemicals, drugs, and environmental pollutants.

Our allergy tests are conducted by Diana Pettis. R.N. Diana Pettis is a trained allergy specialist and registered nurse at UCLA where she works in the neuro-intensive care unit.

Types of Allergy Testing We Provide:

  • Allergy skin testing to determine which environmental allergens to which the patient is sensitive.
  • Allergy treatment including immunotherapy which could be weekly allergy injections or sublingual allergy drops, administered by the patient at home.
  • Food allergy testing to determine which foods are causing reactions to then determine proper treatment.

Allergy tests are done under the guidance of an allergy specialist. These specialists are trained in the best methods for testing and treating allergies. Meet our specialists and get more details regarding Dr. Pettis, causes of ear neck and throat pain and more.



Welcome to OC Ear, Nose, Throat, Head & Neck Surgery.

Leading Specialized Head and Neck Surgeons in Irvine and all of Orange County




We provide comprehensive medical and surgical ear, nose, and throat care for adults and children. Our in-office services include balloon sinuplasty to immediately relieve sinusitis, CT scans of the ears and sinuses, as well as allergy testing and immunotherapy. We also offer complete state-of-the-art hearing evaluations and hearing aid fittings. We perform surgeries at Hoag Hospital in Irvine and Newport Beach, Mission Hospital, CHOC Children’s Hospital, and Long Beach Memorial Hospital.

We focus on individualized care and on developing trusting relationships with our patients. We never rush an appointment and we empower our patients with full understandings of each diagnosis. We look forward to meeting you!


Diagnose and treat all medical ear, nose, and throat concerns

Perform all specialized surgical procedures to address medical head, neck, ear, nose, and throat issues

Conduct all diagnostic and advanced hearing test with individualized hearing and fitting


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Major Insurance Providers Accepted

Please contact our office if you have any questions regarding your insurance plan. 

Advantage Insurance Network
Assurant Health
Blue Cross
Blue Cross Blue Shield
Health Net
Liberty Mutual


Orange Coast ENT Head and Neck Surgery
16100 Sand Canyon Avenue, Suite 230 A
Irvine, CA 92618
Phone: 949-243-7787
Fax: 949-715-0504

Office Hours

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