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2007 ICD-9-CM Volume 1 Diagnosis Codes Home > Diseases Of The Respiratory System 460-519 > Other Diseases Of Upper Respiratory Tract 470-478 > Nasal Polyps 471.* > 2007 ICD-9-CM Diagnosis 471.9 Unspecified nasal polyp This code may be outdated. View the most recent version of ICD-9-CM 471.9 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. 471.9 is a specific code that can be used to specify a diagnosis 471.9 contains 5 index entries View the ICD-9-CM Volume 1 471.* hierarchy 471.9 also known as: Nasal polyp NOS Index entries containing 471.9: Polyp, polypus nares anterior 471.9 nasal (mucous) 471.9 cavity 471.0 septum 471.9 nose (mucous) 471.9 septum (nasal) 471.9