ICD-10 Code H11.001 – Unspecified pterygium of right eye (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H11.001 – Unspecified pterygium of right eye
What it is
H11.001 identifies a pterygium on the right eye when the documentation does not specify the type. A pterygium is a benign, wedge-shaped growth of conjunctival tissue that can extend onto the cornea.
Clinical signs
You may see a fleshy, triangular lesion on the nasal or temporal conjunctiva, sometimes with redness, irritation, or foreign-body sensation. Clinical features vary; refer to documentation.
When to use this code
Use this code when the provider documents pterygium in the right eye but does not identify a more specific type. It also fits encounters for evaluation or follow-up when the diagnosis is recorded without added detail. If laterality or specificity is unclear, check documentation.
Do not use for
Do not use H11.001 for pterygium of the left eye or bilateral disease. Also avoid it when the record specifies a different conjunctival or corneal lesion.
Coding tip
Confirm right-eye laterality and that the note truly says pterygium, not a different ocular surface growth.