ICD-10 Code J01.4 – Acute pansinusitis (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code J01.4 – Acute pansinusitis
What it is
J01.4 identifies acute inflammation of all paranasal sinuses. Use it when the record documents a sudden, short-term sinus infection affecting multiple sinuses at once.
Clinical signs
Typical findings include nasal congestion, facial pressure or pain, purulent nasal drainage, and reduced sense of smell. Clinical features vary; refer to documentation.
When to use this code
Use J01.4 when the provider clearly documents acute pansinusitis, including combined involvement of the frontal, maxillary, ethmoid, and/or sphenoid sinuses. It fits encounter notes describing a recent sinus infection with diffuse sinus inflammation. Check documentation if the sinus involvement is not specified.
Do not use for
Do not use this code for chronic sinusitis, allergic rhinitis, or isolated sinus infection limited to one sinus. If the note only says “sinusitis” without acuity or extent, check documentation.
Coding tip
Confirm both acuity and that multiple sinuses are involved before assigning J01.4.