ICD-10-CM>J00-J99>J20-J22>J21J21Acute bronchiolitisNon-Billable/Non-SpecificIncludesacute bronchiolitis with bronchospasmType 2 Excludesrespiratory bronchiolitis interstitial lung disease (J84.115)CodesJ21.0Acute bronchiolitis due to respiratory syncytial virusJ21.1Acute bronchiolitis due to human metapneumovirusJ21.8Acute bronchiolitis due to other specified organismsJ21.9Acute bronchiolitis, unspecified