viral pneumonia ICD9CM:480 SNOMEDCT_US_2020_03_01:195880002 MESH:D011024 DOID:10533 A pneumonia described as an inflammatory illness of the lung commonly caused by viruses such as influenza virus, parainfluenza, adenovirus, rhinovirus, herpes simplex virus, respiratory syncytial virus, hantavirus, and cytomegalovirus. UMLS_CUI:C0032310 DOID:13167 ICD10CM:J12.9 disease_ontology pneumonia viral infectious disease