ICD-10 Code H11.031 – Double pterygium of right eye (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H11.031 – Double pterygium of right eye
What it is
This code identifies two pterygia affecting the right eye. A pterygium is a benign fibrovascular growth of conjunctival tissue that extends onto the cornea.
Clinical signs
Typical findings include visible conjunctival growths on the nasal or temporal side, with possible irritation, redness, tearing, or foreign-body sensation. Clinical features vary; refer to documentation.
When to use this code
Use H11.031 when the record clearly documents double pterygium in the right eye. Code it when the provider specifies the laterality and confirms that both lesions are present in that eye. Check documentation if the note is unclear about eye side or lesion count.
Do not use for
Do not use this code for a single pterygium, left eye disease, or unspecified laterality. Do not use it when the chart only mentions conjunctival irritation without a documented pterygium.
Coding tip
Verify both laterality and the presence of two pterygia before assigning H11.031.