ICD-10 Code H11.003 – Unspecified pterygium of eye, bilateral (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H11.003 – Unspecified pterygium of eye, bilateral
What it is
This code identifies a pterygium affecting both eyes when the record does not specify the type or severity. A pterygium is a benign fibrovascular growth on the conjunctiva that can extend toward the cornea.
Clinical signs
Typical findings include a visible triangular or wing-shaped conjunctival growth, usually on the nasal side, with possible redness, irritation, or foreign-body sensation. Clinical features vary; refer to documentation.
When to use this code
Use H11.003 when the provider documents bilateral pterygium but does not specify whether it is progressive, recurrent, or otherwise classified. It also fits when both eyes are involved and the chart only states “unspecified pterygium.” Check documentation if laterality is unclear.
Do not use for
Do not use this code for a pterygium limited to one eye or for a different conjunctival lesion. If the record identifies a specific type or laterality, choose the more precise code.
Coding tip
Confirm both laterality and whether the provider documented a more specific pterygium type before assigning H11.003.