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ICD-10-CM 2027

ICD-10 code for conjunctiva edema

H11.42

Conjunctival edema

Header — needs a more specific code

From the official ICD-10-CM alphabetic index entry “Edema, edematous (infectious) (pitting) (toxic) › conjunctiva”. Page updated September 29, 2026.

About coding conjunctiva edema

The ICD-10-CM code for conjunctiva edema is H11.42 (Conjunctival edema).

Within H11.4 (other conjunctival vascular disorders and cysts), H11.42 is specifically for conjunctival edema. Related codes cover vascular abnormalities of conjunctiva (H11.41), conjunctival hyperemia (H11.43) and conjunctival cysts (H11.44).

To report this condition, pick the subcode that matches the documentation: H11.421 (right eye), H11.422 (left eye), H11.423 (bilateral) and H11.429 (unspecified eye).

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.

Common questions about conjunctiva edema ICD-10 codes

What is the ICD-10 code for conjunctiva edema?

H11.42 — Conjunctival edema (a header code; report a more specific subcode).

Is H11.42 billable?

No. H11.42 is a header code. Report one of its more specific subcodes instead.