This recommendation for an allergist & immunologist comes from the American embassy. The American embassy maintains a list of health professionals within the Federal District, and this is updated on a regular basis.
Alergya is an allergist & immunologist clinic. They are located in Centro Médico Lúcio Costa SGAS 610/611 - Asa Sul. The specialist recommended is Dra. Valéria Botan and she speaks Portuguese and English.