ICD-10 Code H16.10 – Unspecified superficial keratitis (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H16.10 – Unspecified superficial keratitis
What it is
H16.10 identifies superficial inflammation of the cornea when the record does not specify the cause or a more precise type. Use it when documentation confirms keratitis but leaves the superficial form unspecified.
Clinical signs
Typical findings may include eye pain, redness, tearing, light sensitivity, and a foreign-body sensation. Clinical features vary; refer to documentation for the exact corneal findings and laterality.
When to use this code
Assign this code when the provider documents superficial keratitis without naming an infectious, contact lens-related, or other specific subtype. It also fits when the note confirms keratitis but does not provide enough detail for a more specific code.
Check documentation if the record mentions corneal abrasion, ulcer, or conjunctivitis instead, because those are coded differently. Use the most specific diagnosis available in the chart.
Do not use for
Do not use H16.10 for corneal ulcer, abrasion, or conjunctivitis. Do not use it when the keratitis type is documented more specifically.
Coding tip
Code H16.10 only after confirming the provider did not document a more specific cause or corneal disorder.