ICD-10 Code H16.022 – Ring corneal ulcer, left eye (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H16.022 – Ring corneal ulcer, left eye
What it is
This code identifies a ring-shaped corneal ulcer in the left eye. It means the corneal lesion is specifically documented as affecting the left side.
Clinical signs
Typical findings include a corneal ulcer with a ring-like infiltrate or opacity and associated ocular pain, redness, tearing, or photophobia. Clinical features vary; refer to documentation.
When to use this code
Use H16.022 when the provider documents a ring corneal ulcer in the left eye, whether on examination, consultation, or discharge summary. Confirm that the laterality is left and that the diagnosis is the ring ulcer itself, not a more general keratitis or corneal abrasion. Check documentation if the note is unclear.
Do not use for
Do not use this code for unspecified corneal ulcers, right-eye disease, or non-ulcer corneal abrasions. If the record only says “corneal ulcer” without ring pattern or laterality, check documentation.
Coding tip
Assign the code only when both the ring morphology and left-eye laterality are documented clearly.