ICD-10 Code H16.059 – Mooren’s corneal ulcer, unspecified eye (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H16.059 – Mooren’s corneal ulcer, unspecified eye
What it is
H16.059 identifies Mooren’s corneal ulcer when the affected eye is not specified. This code is used for a peripheral, painful corneal ulcerative disorder documented as Mooren’s ulcer.
Clinical signs
Typical documentation includes a painful corneal ulcer with peripheral stromal thinning and inflammation. Clinical features vary; refer to documentation if the record does not clearly identify Mooren’s corneal ulcer.
When to use this code
Use H16.059 when the provider diagnoses Mooren’s corneal ulcer but does not document left, right, or bilateral eye. It also fits when the note confirms the condition and the eye laterality is unavailable. If the record names a different corneal ulcer type, check documentation before coding.
Do not use for
Do not use this code for corneal ulcers with a documented cause such as infection, trauma, or exposure. Do not use it when the chart specifies a different eye laterality code.
Coding tip
Verify both the exact diagnosis and eye laterality before assigning H16.059.