ICD-10 Code H18.513 – Endothelial corneal dystrophy, bilateral (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H18.513 – Endothelial corneal dystrophy, bilateral
What it is
Use this code for a bilateral inherited or degenerative corneal disorder affecting the endothelium, the inner layer that helps keep the cornea clear. It is associated with progressive corneal clouding in both eyes.
Clinical signs
Common findings include bilateral corneal edema, blurred vision, and reduced corneal clarity. Clinical features vary; refer to documentation for the specific subtype and laterality.
When to use this code
Use H18.513 when the provider documents endothelial corneal dystrophy involving both eyes. Apply it when the diagnosis is confirmed in the assessment, problem list, or operative note. If the record does not clearly state bilateral disease, check documentation before coding.
Do not use for
Do not use this code for unilateral endothelial corneal dystrophy or for nonspecific corneal edema without a documented dystrophy diagnosis. Check documentation if the condition is described differently.
Coding tip
Verify that the chart explicitly supports bilateral involvement before assigning H18.513.