ICD-10 Code H18.512 – Endothelial corneal dystrophy, left eye (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H18.512 – Endothelial corneal dystrophy, left eye
What it is
This code identifies endothelial corneal dystrophy affecting the left eye. It refers to a corneal disorder in which the inner cell layer fails to keep the cornea clear, leading to swelling and clouding.
Clinical signs
Typical findings include corneal edema, morning blurry vision, glare, and reduced visual clarity. Clinical features vary; refer to documentation, especially if the record specifies the endothelial layer or a named dystrophy.
When to use this code
Use H18.512 when the provider documents endothelial corneal dystrophy in the left eye only. Apply it when the diagnosis is confirmed or clearly stated in the assessment, problem list, or ophthalmology note. Check documentation if laterality is unclear or both eyes are involved.
Do not use for
Do not use this code for nonspecific corneal edema without a documented dystrophy. Do not assign it when the chart describes another corneal dystrophy, postoperative swelling, or an unspecified eye.
Coding tip
Always verify laterality and the exact dystrophy term before coding; if the note says only “corneal dystrophy,” check documentation.