ICD-10 Code H16.032 – Corneal ulcer with hypopyon, left eye (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H16.032 – Corneal ulcer with hypopyon, left eye
What it is
This code identifies a corneal ulcer in the left eye that is accompanied by hypopyon, meaning inflammatory pus or white blood cells layering in the anterior chamber. It reflects a serious corneal infection or inflammation.
Clinical signs
Typical findings include a corneal epithelial defect with stromal infiltrate, eye pain, redness, tearing, photophobia, and reduced vision. Hypopyon may be visible on slit-lamp exam; clinical features vary, so refer to documentation.
When to use this code
Use H16.032 when the record clearly documents a corneal ulcer in the left eye and notes hypopyon. This applies whether the cause is infectious or unspecified, as long as the ulcer and hypopyon are both documented. Confirm laterality and avoid guessing from symptoms alone.
Do not use for
Do not use this code for corneal abrasion, conjunctivitis, or keratitis without an ulcer. If the chart does not specify hypopyon or the left eye, check documentation before coding.
Coding tip
Always verify laterality and the presence of hypopyon in the provider note or ophthalmology exam before assigning H16.032.