ICD-9-CM 471.9 is a billable medical code that can be used to indicate a diagnosis on a reimbursement claim, however, 471.9 should only be used for claims with a date of service on or before September 30, 2015. For claims with a date of service on or after October 1, 2015, use an equivalent ICD-10-CM code (or codes).
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
2015 ICD-9-CM Diagnosis Code 471.9 
nares
posterior 
