CPT® Code 86008

The CPT® Code 86008 refers to a laboratory test that measures allergen-specific immunoglobulin E (IgE) levels in the blood. This test is commonly known as the radioallergosorbent test (RAST) and is classified as an in vitro test, meaning it is conducted outside of a living organism, specifically using blood samples. Unlike skin tests, which are performed directly on the skin (in vivo), this blood test quantifies or semi-quantifies the presence of IgE antibodies that are associated with various allergic reactions. The results are expressed in IgE units, which are interpreted through a scoring system to determine the severity of the allergy. The test is designed to identify a broad spectrum of IgE immunoglobulins, which are antibodies that play a crucial role in allergic responses. These antibodies can be triggered by a variety of allergens, including food items, animal dander, dust mites, molds, and various types of plants such as grasses, trees, and weeds, as well as insect stings. Advances in allergy testing technology have enhanced the ability to detect even low levels of allergen proteins, thereby improving the identification of specific allergies. Typically, the test is performed as part of an allergy panel or profile, which may include multiple allergens relevant to a specific geographic area or demographic group, such as adults or children. These panels can encompass a wide range of common allergens, often numbering a dozen or more. Examples of such panels include the upper respiratory allergy profile, adult food allergy profile, child food allergy profile, and child environmental allergy profile. It is important to note that other related codes exist, such as CPT® Code 86003, which is used for each crude allergen extract tested using a quantitative or semiquantitative method, and CPT® Code 86005, which is applicable for qualitative multiallergen screening tests that determine the presence or absence of specific IgE without providing quantitative measurements.