Other chronic sinusitis

This code represents a persistent inflammation of one or more paranasal sinuses that does not resolve with acute treatment and is not specified as a particular type of chronic sinusitis. It indicates a long-standing sinus infection or inflammatory process, often lasting 12 weeks or more.

Use this code when documentation specifies chronic sinusitis but does not provide further detail regarding the specific sinus involved (e.g., maxillary, frontal, ethmoid, sphenoid) or a more precise etiology (e.g., allergic fungal, hyperplastic). This code is appropriate when the physician's diagnosis is "chronic sinusitis, unspecified" or "other chronic sinusitis."

• Do not use this code if a more specific chronic sinusitis code (e.g., 473.0-473.7) can be assigned based on documentation of the affected sinus(es).
• Always query the provider for greater specificity if the documentation only states "chronic sinusitis" without further detail.
• Consider sequencing this code after any underlying systemic conditions that may contribute to chronic sinusitis, such as cystic fibrosis or immunodeficiency, if applicable.