ICD-10 Code H04.542 – Stenosis of left lacrimal canaliculi (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H04.542 – Stenosis of left lacrimal canaliculi
What it is
H04.542 identifies narrowing of the left lacrimal canaliculus, the small tear-drainage channel near the eyelid. This code describes impaired tear outflow on the left side.
Clinical signs
Typical findings include tearing, poor drainage, and possible reflux from the punctum on the left. Clinical features vary; refer to documentation.
When to use this code
Use this code when the record specifically documents stenosis or narrowing of the left canaliculus. It may also apply when the provider notes left-sided lacrimal outflow obstruction at the canalicular level. Verify laterality and anatomy before coding.
Do not use for
Do not use it for nonspecific tearing without documented stenosis, or for obstruction limited to the punctum, sac, or nasolacrimal duct. Check documentation.
Coding tip
Confirm the word “left” and the canaliculus site in the note before assigning H04.542.