ICD-10 Code H04.559 – Acquired stenosis of unspecified nasolacrimal duct (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H04.559 – Acquired stenosis of unspecified nasolacrimal duct
What it is
This code identifies an acquired narrowing of the tear drainage duct without a specified side. It is used when the blockage develops after birth and the record does not name the right or left duct.
Clinical signs
Typical findings include tearing, a wet eye, and possible discharge from poor tear drainage. Clinical features vary; refer to documentation, especially if the note confirms duct stenosis rather than another cause of epiphora.
When to use this code
Use H04.559 when the provider documents acquired nasolacrimal duct stenosis and does not specify laterality. It also fits follow-up records that continue to describe the same acquired narrowing. You should confirm the diagnosis is not congenital or due to another listed disorder.
Do not use for
Do not use this code for congenital nasolacrimal obstruction or when the record identifies a right or left duct. Check documentation if the problem is described only as tearing, since that symptom alone is not enough.
Coding tip
If laterality is documented, choose the specific code instead of the unspecified option.