This blood test helps determine if you are allergic to a specific substance (allergen).
Allergy testing can be done to determine if you are allergic to a specific substance (allergen). These may include insect bites, mold, pollen, latex, or flakes of animal skin (dander). This testing can also be done to find the possible cause of certain conditions (asthma, hay fever and skin irritation). Two methods of allergy testing are skin tests and blood tests. Right now, skin testing is the main form of allergy testing.
Blood testing involves combining your blood with particles of a potential allergen to see if there is a response. One type of allergy blood testing is called a radioallergosorbent or RAST test.
Most people with allergies do not need allergy testing. In most cases, your healthcare provider can determine the cause of your symptoms by taking a careful history and performing a physical examination. If your symptoms cannot be controlled by avoidance of the allergen or with medications, your doctor may send you to an allergist-immunologist for allergy testing.
In an adult, the blood sample is usually taken by placing a needle in a vein in the arm. In a baby or child, the sample may be taken by pricking a finger or the heel.
This care path's costs do not include the charge to draw blood from a vein (venipuncture). There will only be one charge to draw blood, even if multiple tests are being performed on the samples that are taken.
What should I ask my healthcare provider before having this test?
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