H10.9 — Unspecified conjunctivitis

H10.9

ICD-10 Chapter 7: Eye & Adnexa — illustrative image — Chapter 7: Diseases of the eye and adnexa (H00–H59) — illustrative image

What this code means

Conjunctivitis is inflammation of the conjunctiva, the clear membrane covering the white of the eye and inner eyelids.

Also called: conjunctivitis, pink eye.

When this code is used

Used for conjunctivitis when the type is not specified.

Where it sits in ICD-10-CM

Code H10.9 belongs to Chapter 7: Diseases of the eye and adnexa, which covers codes H00–H59 in the FY2027 ICD-10-CM tabular list. The official description above is copied verbatim from the CDC/NCHS FY2027 code file.

Related anatomy

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Frequently asked questions

What is ICD-10-CM code H10.9?

H10.9 is the ICD-10-CM diagnosis code for “Unspecified conjunctivitis”. Conjunctivitis is inflammation of the conjunctiva, the clear membrane covering the white of the eye and inner eyelids.

When is code H10.9 used?

Used for conjunctivitis when the type is not specified. It belongs to Chapter 7 of ICD-10-CM (Diseases of the eye and adnexa).

This guide explains ICD-10-CM codes in plain language for patients, students and other readers. It is educational information only — not coding, billing or medical advice. The code recorded for any real encounter is assigned from the full clinical documentation by the treating team and qualified coders, and only they can decide which code fits a specific case.