ICD-10 Code H16.299 – Other keratoconjunctivitis, unspecified eye (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H16.299 – Other keratoconjunctivitis, unspecified eye
What it is
This code identifies keratoconjunctivitis affecting an unspecified eye when the record does not name a more specific type. It covers inflammation involving both the cornea and conjunctiva.
Clinical signs
Typical findings may include eye redness, irritation, tearing, foreign-body sensation, and light sensitivity. Clinical features vary; refer to documentation.
When to use this code
Use H16.299 when the provider documents other keratoconjunctivitis but does not specify right or left eye. It also fits when the chart confirms cornea-and-conjunctiva inflammation without a more precise subtype. Check documentation if laterality or etiology is stated elsewhere.
Do not use for
Do not use this code for simple conjunctivitis, keratitis alone, or a clearly identified keratoconjunctivitis type with a more specific code. Do not assume unspecified laterality if the record names an eye.
Coding tip
Verify both the diagnosis wording and laterality in the note before assigning H16.299.