464 Acute laryngitis and tracheitis 
464.0 Acute laryngitis 
464.00 Acute laryngitis without mention of obstruction convert 464.00 to ICD-10-CM
464.01 Acute laryngitis with obstruction convert 464.01 to ICD-10-CM 464.1 Acute tracheitis 464.10 Acute tracheitis without mention of obstruction convert 464.10 to ICD-10-CM 464.11 Acute tracheitis with obstruction convert 464.11 to ICD-10-CM 464.2 Acute laryngotracheitis 464.20 Acute laryngotracheitis without mention of obstruction convert 464.20 to ICD-10-CM 464.21 Acute laryngotracheitis with obstruction convert 464.21 to ICD-10-CM 464.3 Acute epiglottitis 464.30 Acute epiglottitis without mention of obstruction convert 464.30 to ICD-10-CM 464.31 Acute epiglottitis with obstruction convert 464.31 to ICD-10-CM 464.4 Croup convert 464.4 to ICD-10-CM 464.5 Supraglottitis unspecified 
464.50 Supraglottitis unspecified, without obstruction convert 464.50 to ICD-10-CM 464.51 Supraglottitis unspecified, with obstruction convert 464.51 to ICD-10-CM