ICD-10 Code J01.40 – Acute pansinusitis, unspecified (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code J01.40 – Acute pansinusitis, unspecified
What it is
J01.40 identifies an acute infection and inflammation of all paranasal sinuses when the record does not specify the sinus type. Use it when the provider documents acute pansinusitis without further detail.
Clinical signs
Clinical features vary; refer to documentation. Commonly recorded findings include nasal congestion, facial pressure or pain, purulent nasal discharge, and sinus tenderness, but the chart must support an acute sinus infection involving multiple sinuses.
When to use this code
Use this code when the clinician diagnoses acute pansinusitis and does not name the affected sinus or sinuses. It also fits when the note states “unspecified” or gives enough evidence of pan-sinus involvement without site detail. Check documentation if acute versus chronic is unclear.
Do not use for
Do not use J01.40 for chronic sinusitis, allergic rhinitis, or isolated infection of a single sinus. If the record identifies a specific sinus or a different acuity, code that condition instead.
Coding tip
Look for the words “acute,” “pansinusitis,” and “unspecified” in the provider note before assigning J01.40.