ICD-10 Code H16.263 – Vernal keratoconjunctivitis, with limbar and corneal involvement, bilateral (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H16.263 – Vernal keratoconjunctivitis, with limbar and corneal involvement, bilateral
What it is
This code identifies bilateral vernal keratoconjunctivitis with both limbal and corneal involvement. It describes a recurrent, allergic eye condition affecting the conjunctiva and the cornea in both eyes.
Clinical signs
Typical findings include itching, redness, tearing, photophobia, and thick mucus. Clinical features vary; refer to documentation for limbal changes, corneal involvement, or other exam findings supporting this more specific subtype.
When to use this code
Use H16.263 when the record clearly documents vernal keratoconjunctivitis in both eyes with involvement of the limbus and cornea. This code is appropriate when the clinician specifies bilateral disease rather than unilateral or unspecified involvement.
Check documentation if the note mentions only allergic conjunctivitis, seasonal eye allergy, or keratoconjunctivitis without limbal and corneal findings. The code should match the documented laterality and anatomic involvement.
Do not use for
Do not use this code for simple conjunctivitis, unspecified allergic eye disease, or unilateral vernal keratoconjunctivitis. If limbal or corneal involvement is not documented, choose the more accurate code after reviewing the chart.
Coding tip
Confirm both laterality and the limbal/corneal involvement in the ophthalmology note before assigning H16.263.