Nontuberculous mycobacteria (NTM) cause a chronic pulmonary infection associated with cough, fatigue, and shortness of breath. We seek to develop and test a disease-specific patient-reported outcome measure (PROM) in well-characterized populations of patients with NTM pulmonary disease. Ultimately, a validated PROM for individuals with NTM pulmonary disease will fill a critical need for effective NTM treatments by improving clinical trial design and identifying a meaningful endpoint that can guide therapeutic development.