ICD-10 Code H04.321 – Acute dacryocystitis of right lacrimal passage (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H04.321 – Acute dacryocystitis of right lacrimal passage
What it is
Use this code for an acute infection and inflammation of the right lacrimal sac and tear drainage pathway. It indicates a right-sided dacryocystitis diagnosis, not a general eye infection.
Clinical signs
Typical findings include pain, redness, swelling, and tenderness near the inner corner of the right eye. Clinical features vary; refer to documentation for confirmation of the affected side and acuity.
When to use this code
Use H04.321 when the record clearly documents acute dacryocystitis involving the right lacrimal passage. You should also use it when the clinician specifies right-sided lacrimal sac infection, even if the note uses different wording.
Check documentation if the laterality is unclear or if the condition is chronic, recurrent, or unspecified. Do not assume right-sided disease from general tearing or eye discharge alone.
Do not use for
Do not use this code for left-sided, bilateral, or unspecified dacryocystitis. Also avoid it when the chart documents another eye disorder without clear lacrimal sac involvement.
Coding tip
Verify both acuity and laterality in the provider note before assigning H04.321.