ICD-10 Code H11.033 – Double pterygium of eye, bilateral (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H11.033 – Double pterygium of eye, bilateral
What it is
H11.033 identifies double pterygium affecting both eyes. It describes a benign conjunctival growth extending onto the cornea in each eye, with two separate pterygium lesions per eye.
Clinical signs
Typical findings include visible fibrovascular tissue on the conjunctiva crossing toward the cornea, often with irritation, redness, or a foreign-body sensation. Clinical features vary; refer to documentation.
When to use this code
Use this code when the provider documents bilateral double pterygium, meaning two pterygium lesions are present in each eye. It is appropriate for confirmed diagnoses in the chart, operative notes, or ophthalmology assessments. If laterality or the “double” detail is missing, check documentation.
Do not use for
Do not use this code for a single pterygium, unilateral disease, or other conjunctival lesions. If the record does not clearly state bilateral double pterygium, check documentation rather than assuming H11.033.
Coding tip
Confirm both laterality and the “double” descriptor in the provider note before assigning H11.033.