ICD-10 Code H16.043 – Marginal corneal ulcer, bilateral (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H16.043 – Marginal corneal ulcer, bilateral
What it is
H16.043 identifies a marginal corneal ulcer affecting both eyes. This means an ulcer at the edge of the cornea, usually documented as bilateral.
Clinical signs
Typical findings include peripheral corneal inflammation, pain, redness, tearing, and light sensitivity. Clinical features vary; refer to documentation for bilateral involvement and ulcer location.
When to use this code
Use this code when the provider documents marginal corneal ulcer in both eyes, or bilateral peripheral corneal ulceration. Apply it when the record clearly identifies the condition and eye laterality.
If the note only says corneal ulcer without location or laterality, check documentation before coding. You should not assume bilateral disease from nonspecific eye findings.
Do not use for
Do not use for corneal abrasion, keratitis without ulcer, or a unilateral marginal corneal ulcer. Check documentation if the diagnosis is nonspecific or if laterality is missing.
Coding tip
Confirm both the marginal location and bilateral laterality in the provider note before assigning H16.043.