ICD-10 Code H04.421 – Chronic lacrimal canaliculitis of right lacrimal passage (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H04.421 – Chronic lacrimal canaliculitis of right lacrimal passage
What it is
This code identifies long-standing inflammation or infection of the canaliculus, the small drainage channel near the right eye. It is specific to the right lacrimal passage and reflects a chronic condition rather than an acute episode.
Clinical signs
Typical findings include persistent tearing, discharge from the punctum, eyelid irritation, or localized tenderness near the inner corner of the eye. Clinical features vary; refer to documentation.
When to use this code
Use H04.421 when the provider documents chronic canaliculitis affecting the right lacrimal drainage system. This is appropriate when the record clearly identifies the right side and describes the condition as chronic, recurrent, or long-standing. If laterality or chronicity is not documented, check documentation.
Do not use for
Do not use this code for acute canaliculitis, unspecified lacrimal disorders, or conditions involving the left side. If the note does not confirm the right lacrimal passage, choose a more accurate code.
Coding tip
Verify both laterality and chronicity in the ophthalmology note before assigning H04.421.