ICD-10 Code H11.03 – Double pterygium of eye (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H11.03 – Double pterygium of eye
What it is
Double pterygium means a benign fibrovascular growth on the conjunctiva is present on both sides of the eye. It usually extends toward the cornea and can affect the visual axis if advanced.
Clinical signs
Look for bilateral, triangular conjunctival tissue encroaching onto the cornea. Clinical features vary; refer to documentation for laterality, size, and whether vision is affected.
When to use this code
Use H11.03 when the provider documents double pterygium of the eye, or bilateral pterygium involving both nasal and temporal sides. Apply it when the condition is confirmed and not just suspected.
If the note only says “pterygium” without specifying double involvement, check documentation before coding. Do not assume laterality or count unless the record supports it.
Do not use for
Do not use this code for a single pterygium, pinguecula, or other conjunctival lesions. If the diagnosis is unclear, check documentation.
Coding tip
Verify that the provider explicitly documents “double” pterygium before assigning H11.03.