Nonspecific Interstitial Pneumonia By Joyce Lee, MD, MAS, University of Colorado School of Medicine Reviewed / Revised Jun 2021 | Modified Sep 2022 View Patient Education Diagnosis Treatment Key Points Topic Resources Idiopathic Nonspecific Interstiti... Nonspecific interstitial pneumonia is an idiopathic interstitial pneumonia that occurs mainly in women, nonsmokers, and patients < 50 years.