ICD-10 Code H18.511 – Endothelial corneal dystrophy, right eye (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H18.511 – Endothelial corneal dystrophy, right eye
What it is
Endothelial corneal dystrophy is a hereditary or degenerative disorder of the corneal endothelium in the right eye. It causes progressive loss of endothelial function, leading to corneal swelling and reduced clarity.
Clinical signs
Typical findings include corneal edema, blurred vision, and morning visual fluctuation. Clinical features vary; refer to documentation if the record does not clearly describe endothelial involvement.
When to use this code
Use H18.511 when documentation specifically identifies endothelial corneal dystrophy in the right eye. This code fits ophthalmology notes, problem lists, or specialist assessments that name the laterality and corneal layer involved. If laterality is not stated, check documentation.
Do not use for
Do not use this code for corneal edema without a documented dystrophy, or for disease in the left eye or both eyes. Check documentation when the chart only says “corneal dystrophy” without endothelial detail.
Coding tip
Confirm both the dystrophy type and right-eye laterality before assigning H18.511.