ICD-10 Code H11.422 – Conjunctival edema, left eye (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H11.422 – Conjunctival edema, left eye
What it is
H11.422 identifies edema, or swelling, of the conjunctiva in the left eye. Use it when documentation specifically names conjunctival edema on the left side.
Clinical signs
Clinical features vary; refer to documentation. Typical findings may include visible conjunctival swelling, a boggy or puffy appearance, and irritation of the eye surface.
When to use this code
Use this code when the provider documents conjunctival edema affecting only the left eye. It may appear as a primary finding or as part of another documented eye condition. If the note does not specify laterality, check documentation before coding.
Do not use for
Do not use this code for generalized eye swelling without conjunctival involvement, or when the right eye or both eyes are documented instead. Check documentation if the record only says “eye edema.”
Coding tip
Confirm laterality in the provider note; H11.422 is only for the left eye.