IGHE and cystic fibrosis: Among patients with cystic fibrosis (Commercial/Medicare: n = 5,279, Medicaid: n = 4,013), 15.2% and 11.2%, respectively, received total serum IgE testing, 2.7% and 1.6% received allergen specific IgE testing, and 0.8% and 0.2% received testing for Aspergillus precipitating antibodies.