ICD-10 Code H16.033 – Corneal ulcer with hypopyon, bilateral (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H16.033 – Corneal ulcer with hypopyon, bilateral
What it is
This code identifies a corneal ulcer in both eyes with hypopyon, meaning white blood cells or pus are layered in the front chamber of the eye. Use it when documentation clearly states bilateral involvement.
Clinical signs
Typical findings include a corneal epithelial defect, stromal inflammation, eye pain, redness, tearing, and reduced vision. Hypopyon may be seen on exam; clinical features vary, so refer to documentation.
When to use this code
Use H16.033 when the provider documents a corneal ulcer affecting both eyes and specifically notes hypopyon. It also fits when the record describes bilateral corneal ulceration with anterior chamber pus layering. If laterality is unclear, check documentation before coding.
Do not use for
Do not use this code for a unilateral corneal ulcer, a corneal abrasion, or conjunctivitis without ulceration. Do not assume hypopyon unless it is documented.
Coding tip
Confirm both laterality and the presence of hypopyon in the ophthalmology note before assigning this code.