ICD-10 Code H16.202 – Unspecified keratoconjunctivitis, left eye (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H16.202 – Unspecified keratoconjunctivitis, left eye
What it is
This code identifies inflammation of both the cornea and conjunctiva in the left eye when the type is not further specified. Use it when the record documents keratoconjunctivitis but does not name a more precise cause.
Clinical signs
Findings may include eye redness, irritation, tearing, foreign-body sensation, photophobia, or blurred vision. Clinical features vary; refer to documentation.
When to use this code
Use H16.202 when the clinician documents keratoconjunctivitis affecting the left eye and does not identify a specific subtype, such as allergic, viral, or dry eye-related disease. It also fits when laterality is clear but the cause remains unspecified. Check documentation if the record only says conjunctivitis or keratitis alone.
Do not use for
Do not use this code for keratoconjunctivitis in another eye or when the condition is documented as a more specific diagnosis. Avoid it if the note describes isolated conjunctivitis or keratitis without combined corneal and conjunctival involvement.
Coding tip
Confirm both laterality and the combined corneal-conjunctival diagnosis before assigning this code.