ICD-10 Code H18.721 – Corneal staphyloma, right eye (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H18.721 – Corneal staphyloma, right eye
What it is
This code identifies a staphyloma involving the cornea of the right eye. It means the corneal tissue is thinned and bulges outward, creating an abnormal protrusion.
Clinical signs
Clinical features vary; refer to documentation. Typical findings may include a visible corneal bulge, irregular corneal contour, and reduced visual function if the cornea is significantly distorted.
When to use this code
Use H18.721 when the provider documents corneal staphyloma specifically in the right eye. Code it when the diagnosis is confirmed in the assessment, exam, or operative note. Check documentation if the record only describes corneal scarring, ectasia, or another corneal deformity without naming staphyloma.
Do not use for
Do not use this code for left-eye or bilateral corneal staphyloma, or for nonspecific corneal protrusion without laterality. If the note does not clearly identify staphyloma, check documentation.
Coding tip
Always confirm both the diagnosis and the right-eye laterality before assigning H18.721.