ICD-10 Code H18.519 – Endothelial corneal dystrophy, unspecified eye (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H18.519 – Endothelial corneal dystrophy, unspecified eye
What it is
This code identifies endothelial corneal dystrophy affecting an eye, with no laterality specified. It refers to a corneal disorder involving the inner endothelial layer, which can impair corneal clarity.
Clinical signs
Clinical features vary; refer to documentation. Commonly documented findings include corneal edema, blurred vision, and reduced corneal transparency, but you should code only when the provider records endothelial corneal dystrophy.
When to use this code
Use H18.519 when the record states endothelial corneal dystrophy and does not identify the right or left eye. It is appropriate for outpatient, specialty, or follow-up documentation where laterality is missing or unspecified.
If the note names a specific eye, choose the laterality-specific code instead. Check documentation when the provider uses a broader corneal dystrophy term or when the diagnosis is uncertain.
Do not use for
Do not use this code for other corneal dystrophies, corneal edema without dystrophy, or diagnoses that specify a different eye. If the condition is not documented as endothelial corneal dystrophy, check documentation.
Coding tip
Verify laterality in the ophthalmology note before assigning H18.519, because unspecified-eye coding is only correct when the record truly lacks eye identification.