2006 ICD-9-CM Volume 1 Diagnosis Codes Home > Diseases Of The Respiratory System 460-519 > Other Diseases Of Upper Respiratory Tract 470-478 > 2006 ICD-9-CM Diagnosis 471 Nasal polyps View the most recent version of ICD-9-CM 471 Focal accumulations of EDEMA fluid in the NASAL MUCOSA accompanied by HYPERPLASIA of the associated submucosal connective tissue. Polyps may be NEOPLASMS, foci of INFLAMMATION, degenerative lesions, or malformations. 471 is a non-specific code that cannot be used to specify a diagnosis 471 Excludes adenomatous polyps (212.0)