2006 ICD-9-CM Volume 1 Diagnosis Codes Home > Diseases Of The Respiratory System 460-519 > Acute Respiratory Infections 460-466 > Acute Laryngitis And Tracheitis 464.* > 2006 ICD-9-CM Diagnosis 464.4 Croup View the most recent version of ICD-9-CM 464.4 A condition characterized by resonant barking cough, hoarseness and persistant stridor and caused by allergy, foreign body, infection, or neoplasm. It occurs chiefly in infants and children. 464.4 is a specific code that can be used to specify a diagnosis 464.4 contains 5 index entries View the ICD-9-CM Volume 1 464.* hierarchy Alternate Terminology Croup syndrome  Index entries containing 464.4: Angina (attack) (cardiac) (chest) (effort) (heart) (pectoris) (syndrome) (vasomotor) 413.9 croupous 464.4 membranous 464.4 diphtheritic 032.0 trachealis 464.4 Croup, croupous (acute) (angina) (catarrhal) (infective) (inflammatory) (laryngeal) (membranous) (nondiphtheritic) (pseudomembranous) 464.4 asthmatic (see also Asthma) 493.9 bronchial 466.0 diphtheritic (membranous) 032.3 false 478.75 spasmodic 478.75 diphtheritic 032.3 stridulous 478.75 diphtheritic 032.3 Syndrome - see also Disease croup 464.4