ICD-10 Code H18.713 – Corneal ectasia, bilateral (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H18.713 – Corneal ectasia, bilateral
What it is
Corneal ectasia means thinning and outward bulging of the cornea, and this code specifies that it affects both eyes. Use it when documentation clearly identifies bilateral corneal ectasia.
Clinical signs
Typical findings include progressive corneal thinning, irregular astigmatism, and reduced visual quality. Clinical features vary; refer to documentation for the exact ophthalmic findings and laterality.
When to use this code
Use H18.713 when the provider documents bilateral corneal ectasia, including postoperative or progressive corneal shape change if named that way. This code supports records showing the condition in both eyes, not just one eye or unspecified laterality.
Do not use for
Do not use this code for unilateral corneal ectasia or when the record only says corneal disorder without ectasia. Check documentation if the laterality is unclear.
Coding tip
Confirm that the note states bilateral involvement before assigning H18.713.