ICD-10 Code H16.219 – Exposure keratoconjunctivitis, unspecified eye (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H16.219 – Exposure keratoconjunctivitis, unspecified eye
What it is
This code identifies keratoconjunctivitis caused by exposure of the eye surface, usually from incomplete eyelid closure or reduced protection of the cornea and conjunctiva. “Unspecified eye” means the documentation does not name the right or left eye.
Clinical signs
Typical findings include ocular irritation, redness, foreign-body sensation, tearing, and surface dryness. Clinical features vary; refer to documentation for laterality and any corneal involvement.
When to use this code
Use H16.219 when the record documents exposure keratoconjunctivitis but does not specify which eye is affected. It fits cases tied to lagophthalmos, facial nerve weakness, or other exposure-related causes when the provider names the condition. If the chart identifies a right or left eye, use the more specific code instead.
Do not use for
Do not use this code for dry eye syndrome, infectious conjunctivitis, or corneal injury without keratoconjunctivitis. Check documentation if the eye laterality is stated or if the condition is described under a different diagnosis.
Coding tip
Confirm both the exposure cause and eye laterality in the note before selecting the unspecified-eye code.