ICD-10 Code H11.813 – Pseudopterygium of conjunctiva, bilateral (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H11.813 – Pseudopterygium of conjunctiva, bilateral
What it is
Pseudopterygium is an abnormal conjunctival adhesion to the cornea that can resemble a pterygium. This code specifies involvement of both eyes, so you should use it only when documentation clearly states bilateral disease.
Clinical signs
Findings may include a fibrovascular or scar-like conjunctival fold extending toward the cornea, often with a history of prior inflammation, trauma, or ocular surface disease. Clinical features vary; refer to documentation.
When to use this code
Use H11.813 when the provider documents pseudopterygium of the conjunctiva affecting both eyes. It is appropriate when the note distinguishes pseudopterygium from true pterygium or other conjunctival lesions. If laterality is unclear, check documentation before coding.
Do not use for
Do not use this code for a true pterygium, unilateral pseudopterygium, or an unspecified conjunctival growth. If the record does not confirm bilateral involvement, check documentation.
Coding tip
Confirm both the diagnosis and laterality in the ophthalmology note before assigning H11.813.