Acute sinusitis, unspecified

This code represents an acute inflammation of the paranasal sinuses where the specific sinus(es) affected are not documented. It indicates a sudden onset of symptoms such as facial pain, pressure, nasal congestion, and discharge, without further specification of the anatomical site.

This code is appropriate when the physician's documentation confirms a diagnosis of acute sinusitis but does not specify which sinus (e.g., maxillary, frontal, ethmoid, sphenoid) is involved. It should be used when the medical record explicitly states "acute sinusitis, unspecified" or "acute sinusitis NOS."

• Avoid using this code if the documentation specifies the affected sinus(es); instead, use a more specific code from the 461.x series.
• Query the provider for clarification if the documentation mentions acute sinusitis but lacks specificity regarding the anatomical site.
• This code is for acute conditions; do not use for chronic sinusitis (e.g., 473.9).