Allergy is often practiced by physicians who lack both certification and in-depth training in allergy and immunology. In order to receive certification of competence in adult and pediatric allergy by the American Board of Allergy and Immunology (a conjoint board of the American Board of Internal Medicine and the American Board of Pediatrics), an allergist must have at least three years of approved training either in internal medicine or pediatrics leading to certification in that specialty.

American Board of Allergy and Immunology (ABAI)

After this, two additional years of training in the basic science and clinical aspects of allergy, asthma and immunology are required. He must then pass an extensive examination in allergy and immunology administered by the board before becoming a diplomate of (certified by) the American Board of Allergy and Immunology.