Sherwin Hariri, MD, FAAAAI, FACAAI -  - Allergist

Beverly Hills Allergy

Sherwin Hariri, MD, FAAAAI, FACAAI

Allergist & Immunologist located in Beverly Hills, CA

Skin Patch Test Specialist

As a top allergist in the Greater Los Angeles area, Dr. Hariri uses patch skin tests to help identify the underlying causes of many types of allergies so patients can get the most appropriate treatments to avoid allergic reactions.

Allergy Testing

What is patch skin testing?

Patch skin testing is performed to determine what allergen is causing a delayed allergic skin reaction. It is often very useful in identifying the cause of different types of skin rashes patients present with. Potential allergens are different chemicals, metals, dyes, preservatives, rubbers, and many other substances. During the patch test, your skin will be exposed to allergens and your reaction will be noted over a period of time to determine if you have a sensitivity to that substance. In some cases, it can take several days for a skin reaction to occur.  Therefore, the patch test results will not be read until 48 to 96 hours after applying the patches to the patient's skin. The results of your patch test can help Dr. Hariri determine the best course of treatment to help you avoid allergic reactions and significant skin rashes.

How is patch testing performed?

In a patch test, allergens are applied to special skin patches, which are placed on your the skin of your back or arm and allowed to remain there for about 48 hours. A single patch tests can include as many as 20 to 30 different substances for testing, including dyes, preservatives, resins, fragrances and other substances. While the patches are in place, you'll need to avoid bathing or participating in exercises that could cause you to perspire, which can wind up diluting the substance and causing a false result. When you return to the doctor to have the patches removed, Dr. Hariri will look for signs of skin reactions or irritation and determine if they indicate an allergy.

Can patch skin tests be performed on anyone?

Skin patch tests may not be a good choice for people who have a history of severe allergic reactions, who take medicines that could interfere with results or have certain skin conditions.


We accept major insurance plans. If you don't see your provider in the list, please contact our office for more information. 

Anthem Blue Cross Blue Shield
Anthem Blue Cross of California
Blue Cross Blue Shield
CBA Blue
Health Net

Words from our patients

  • Google+

    "Very caring and knowledgable Doctor! He really knows how to treat allergies. Beautiful office btw!"

    Tina Chuldzh
  • Google+

    "Genuine and very helpful! Staff is professional and I only had to wait 5 minutes to see the doctor."

    Honor Guard Team
  • Patient Fusion

    "Dr. Hariri is a very genuine doctor who is very interested in his patients' health and answers any questions you might have so that you feel comfortable."

  • Google+

    "Competency. Compassion. Respect. Altruism. Four distinct traits that truly encompass Dr. Sherwin Hariri and his practice."

    Artin Galoosian
  • Google+

    "Dr. Hariri is a very compassionate doctor. He took his time and explained everything to me very well! I highly recommend him to all my family and friends!"

    Jackie I.
  • Yelp

    "His office looked very nice and elegant. I was able to get into his clinic immediately and the waiting time to be seen was very short."

    George M.
  • Yelp

    "Very knowledgable about food allergies. Within 15 min he figured out what I'm allergic to and testing was painless. Highly recommend."

    R-Mean P.
  • Yelp

    "Dr. Hariri was so helpful in my understanding of my seasonal allergies. He took great care of me and I would enthusiastically recommend him to anyone."

    Caroline T.
  • Yelp

    "Doctor Hariri is the BEST!!! He is a true life saver! He is compassionate and smart. I finally found a Doctor who knows how to treat my eczema!"

    Annette M.
  • Google+

    "He is awesome and really cares about the overall health of his patients. He also has a great assistant!"

    Jacob R.
  • "I had an amazing experience! I came in today as new patient for a severe rash. Dr. Sherwin and his team were more than phenomenal."{

  • "I would highly recommend Dr. Sherwin in the future to friends and family members who are seeking the assistance of an allergist in the greater Los Angeles area."

  • Square

    "I always feel cared for whenever I go to this practice. The doctor is very nice and genuinely cares for his patients. Sabrina is always pleasant and helpful as well."

  • Google+

    "I have seen many allergists in the past, and finally I walked into an office where I truly felt the doctor was not only brilliant, but also cared to listen to me."

    Alec P.
  • Yelp

    "Dr. Hariri is the best. He definitely cares about his patients and will go above and beyond. Thank you Dr. Hariri for your amazing help and guidance!"

    Holly B.
  • Yelp

    "Dr. Hariri is a genuine doctor who cares about his patients. He is very knowledgeable and smart. Thank you Dr. Hariri for everything!"

    Arpine M.
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