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 464.0 Acute laryngitis View the most recent version of ICD-9-CM 464.0 Inflammation of the larynx. Inflammation of the larynx. This condition presents itself with dryness and soreness of the throat, difficulty in swallowing, cough, and hoarseness. 464.0 is a non-specific code that cannot be used to specify a diagnosis View the ICD-9-CM Volume 1 464.* hierarchy Alternate Terminology Laryngitis (acute): NOS edematous Hemophilus influenzae [H. influenzae] pneumococcal septic suppurative ulcerative 464.0 Excludes chronic laryngitis (476.0-476.1) influenzal laryngitis (487.1)