2006 ICD-9-CM Volume 1 Diagnosis Codes > Diseases Of The Respiratory System 460-519 > Other Diseases Of Upper Respiratory Tract 470-478 > 470 Deviated nasal septum 471 Nasal polyps 472 Chronic pharyngitis and nasopharyngitis 473 Chronic sinusitis 474 Chronic disease of tonsils and adenoids 475 Peritonsillar abscess 476 Chronic laryngitis and laryngotracheitis 477 Allergic rhinitis 478 Other diseases of upper respiratory tract