ICD-10 Code H16.2 – Keratoconjunctivitis (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H16.2 – Keratoconjunctivitis
What it is
Keratoconjunctivitis means inflammation affecting both the cornea and conjunctiva. Use this code when documentation identifies the combined eye condition rather than isolated conjunctivitis or keratitis.
Clinical signs
Typical findings include eye redness, irritation, tearing, foreign-body sensation, and light sensitivity. Clinical features vary; refer to documentation for the specific type and laterality if recorded.
When to use this code
Use H16.2 when the provider documents keratoconjunctivitis as the diagnosis, or describes inflammation involving both the cornea and conjunctiva. It may be appropriate for acute or chronic presentations if the record supports that wording. If the note names a specific cause or subtype, code according to documentation.
Do not use for
Do not use this code for uncomplicated conjunctivitis or isolated keratitis. Check documentation if the record instead identifies a separate infectious, allergic, or autoimmune eye disorder.
Coding tip
Verify whether the note specifies laterality or a more detailed subtype before assigning H16.2.