ICD-10 Code H11.029 – Central pterygium of unspecified eye (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H11.029 – Central pterygium of unspecified eye
What it is
This code identifies a central pterygium in an eye, meaning a fibrovascular growth of conjunctival tissue extending onto the cornea. Use it when the record specifies the central location but does not name the affected eye.
Clinical signs
Typical findings include a visible triangular or wing-shaped conjunctival growth crossing the limbus and moving toward the cornea. Clinical features vary; refer to documentation for laterality, extent, and whether vision is affected.
When to use this code
Use H11.029 when the provider documents a central pterygium and does not specify right or left eye. It fits outpatient, ophthalmology, or problem-list documentation that clearly identifies the lesion’s central corneal location. Check documentation if the note only says “pterygium” without location or eye.
Do not use for
Do not use this code for pterygium with a documented right or left eye, or for other conjunctival growths. If the record is vague or refers to a different ocular surface lesion, check documentation.
Coding tip
Confirm both the anatomic site and laterality in the note before assigning H11.029.