ICD-10 Code H16.031 – Corneal ulcer with hypopyon, right eye (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H16.031 – Corneal ulcer with hypopyon, right eye
What it is
H16.031 identifies a corneal ulcer in the right eye that is accompanied by hypopyon, meaning inflammatory white cells have layered in the anterior chamber. Use it when the ulcer and hypopyon are both documented.
Clinical signs
Typical findings include a corneal epithelial defect with stromal infiltrate, eye pain, redness, tearing, photophobia, and decreased vision. Hypopyon may be seen on exam as a visible white fluid level in the anterior chamber; check documentation.
When to use this code
Use this code when the clinician documents a corneal ulcer of the right eye and specifically notes hypopyon. It also fits when the record describes a corneal ulcer with anterior chamber pus or layered inflammatory cells in the right eye. If laterality is unclear, check documentation before coding.
Do not use for
Do not use H16.031 for a corneal ulcer without hypopyon, or for disease in the left eye or both eyes. Do not assign it when the note only mentions conjunctivitis, keratitis, or another corneal disorder without ulceration.
Coding tip
Verify both the ulcer and hypopyon are documented, and confirm right-eye laterality before assigning H16.031.