ICD-10 Code H16.212 – Exposure keratoconjunctivitis, left eye (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H16.212 – Exposure keratoconjunctivitis, left eye
What it is
This code identifies exposure keratoconjunctivitis affecting the left eye. It means the cornea and conjunctiva are irritated because the eye is not adequately protected or closed.
Clinical signs
Typical findings include redness, tearing, foreign-body sensation, dryness, and surface irritation in the left eye. Clinical features vary; refer to documentation for corneal exposure or incomplete eyelid closure.
When to use this code
Use H16.212 when the record clearly documents exposure keratoconjunctivitis in the left eye. This may apply when the left eye is exposed from lagophthalmos, facial nerve weakness, eyelid problems, or similar causes. Code only the documented laterality and condition.
Do not use for
Do not use this code for unspecified keratoconjunctivitis, generalized dry eye, or right-eye disease. Check documentation if the eye involved or the exposure cause is not clearly stated.
Coding tip
Confirm that the provider documents the left eye and an exposure-related cause before assigning H16.212.