Gu JP, et al. - Via performing a retrospective study, researchers sought to evaluate how clinicians diagnose chronic hypersensitivity pneumonitis (cHP) using items identified in the international modified Delphi survey of experts, ie, environmental exposure, CT imaging, and lung pathology in the Southeast United States, where the climate is humid favoring mold growth. Patients over the age of 18 with a diagnosis of cHP were identified from Duke University Medical Center database (January 1, 2008, to December 31, 2013) using a query tool, Duke Enterprise Data Unified Content Explorer (DEDUCE). The database yielded data of 500 patients and 261 patients with cHP confirmed in clinic notes by a pulmonologist or an allergist. The Research Triangle area, where the medical center is located, inhabited nearly half of the patients, giving an estimated prevalence rate of 6.5 per 100,000 persons. The analysis revealed that in the Southeast United States, environmental mold was the most common exposure for cHP. More than half of cHP cases had lung pathology available in this tertiary care center. This possibly shows the complexity of referrals. They recommend considering differences in exposure sources and referral patterns in devising future diagnostic pathways or guidelines for cHP.