ICD-10 Code H16.1 – Other and unspecified superficial keratitis without conjunctivitis (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H16.1 – Other and unspecified superficial keratitis without conjunctivitis
What it is
H16.1 identifies superficial inflammation or damage of the cornea when conjunctivitis is not present. Use it for corneal surface disease that is described as other, unspecified, or superficial keratitis.
Clinical signs
Typical findings include corneal irritation, redness, foreign-body sensation, tearing, and photophobia. Clinical features vary; refer to documentation, especially when the note describes only superficial keratitis without conjunctival involvement.
When to use this code
Use this code when the provider documents superficial keratitis, corneal surface inflammation, or an unspecified keratitis limited to the cornea. It also fits cases where the record does not identify a more specific keratitis type. You should confirm that conjunctivitis is not documented.
Do not use for
Do not use H16.1 if the chart clearly documents conjunctivitis, corneal ulcer, or a more specific keratitis diagnosis. Check documentation when the note includes deeper corneal disease or another named eye disorder.
Coding tip
Code the most specific keratitis term documented, and verify the absence of conjunctivitis before assigning H16.1.