Unspecified sinusitis (chronic)

This code represents a persistent inflammation of the paranasal sinuses where the specific sinus or sinuses affected are not documented. It indicates a long-standing or recurrent inflammatory process within the sinus cavities without further anatomical detail.

Use this code when the medical record clearly indicates a diagnosis of chronic sinusitis, but the physician's documentation does not specify which particular sinus (e.g., maxillary, frontal, ethmoid, sphenoid) is involved. This code is appropriate when the provider uses terms like "chronic sinusitis" or "unspecified chronic rhinosinusitis" without further anatomical clarification.

• Avoid using this code if the documentation specifies the affected sinus(es); instead, use a more specific code from the 473.0-473.8 series.
• Query the provider for greater specificity regarding the affected sinus(es if possible, as more specific codes offer better data for analysis and reimbursement.
• This code is for chronic conditions; do not use it for acute sinusitis (codes 461.0-461.9).