ICD-10 Code H04.31 – Phlegmonous dacryocystitis (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H04.31 – Phlegmonous dacryocystitis
What it is
H04.31 identifies an acute, suppurative infection of the lacrimal sac, usually from blocked tear drainage. Use it when the record specifically describes phlegmonous dacryocystitis.
Clinical signs
Typical findings include painful swelling, redness, and tenderness at the inner corner of the eye. Purulent discharge from the punctum may be noted; clinical features vary, so refer to documentation.
When to use this code
Use this code when the provider documents phlegmonous dacryocystitis, acute lacrimal sac infection, or equivalent wording tied to the lacrimal sac. It is appropriate when the condition is the reason for the encounter or a clearly documented active diagnosis. If the note only says “eye infection,” check documentation.
Do not use for
Do not use H04.31 for conjunctivitis, eyelid cellulitis, or nonspecific tearing without lacrimal sac infection. If the chart describes a different lacrimal disorder, verify the exact diagnosis.
Coding tip
Look for documentation of the lacrimal sac and acute suppuration before assigning H04.31.