ICD-10 Code H11.052 – Peripheral pterygium, progressive, left eye (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H11.052 – Peripheral pterygium, progressive, left eye
What it is
This code identifies a progressive pterygium on the left eye. A pterygium is a benign fibrovascular growth of conjunctival tissue that extends toward the cornea.
Clinical signs
Typical findings include a visible wedge-shaped growth on the conjunctiva, usually nasal, with extension toward the cornea. Clinical features vary; refer to documentation for symptoms such as irritation, redness, or visual disturbance.
When to use this code
Use H11.052 when the record clearly documents a progressive pterygium in the left eye. Select this code when the provider specifies laterality and progression, not just a general conjunctival lesion.
Use it for office, ophthalmology, or procedure notes that describe the left eye lesion as advancing toward the cornea. Check documentation if the note only says pterygium without eye or progression details.
Do not use for
Do not use this code for pterygium in the right eye or unspecified eye. Do not use it for pinguecula, conjunctivitis, or other non-pterygium conjunctival disorders.
Coding tip
Verify both laterality and the term “progressive” in the provider note before assigning H11.052.