ICD-10 Code H16.049 – Marginal corneal ulcer, unspecified eye (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H16.049 – Marginal corneal ulcer, unspecified eye
What it is
This code identifies a marginal corneal ulcer affecting the cornea near its edge, with no eye specified in the record. Use it when documentation confirms the condition but does not name right, left, or bilateral eye.
Clinical signs
Typical findings may include a peripheral corneal ulcer, redness, pain, tearing, and light sensitivity. Clinical features vary; refer to documentation for the specific eye involved and any associated keratitis or inflammation.
When to use this code
Use H16.049 when the provider documents a marginal corneal ulcer and does not specify which eye is affected. It also fits cases where the chart says “unspecified eye” or laterality is unavailable. If the record names the eye, choose the laterality-specific code instead.
Do not use for
Do not use this code for corneal ulcers with a different cause or location unless documentation confirms a marginal ulcer. Do not assign it when the affected eye is clearly documented and a more specific code is available.
Coding tip
Check the ophthalmology note for laterality before defaulting to H16.049.