ICD-10 Code H18.891 – Other specified disorders of cornea, right eye (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H18.891 – Other specified disorders of cornea, right eye
What it is
This code identifies a corneal disorder in the right eye that is documented but does not fit a more specific ICD-10-CM cornea category. Use it when the provider names a distinct condition and laterality is right eye.
Clinical signs
Clinical features vary; refer to documentation. Corneal findings may include pain, redness, tearing, blurred vision, foreign-body sensation, or visible surface changes on exam.
When to use this code
Use H18.891 when the record states an unspecified or otherwise named corneal disorder affecting only the right eye and no more specific code is available. It is appropriate when the diagnosis is confirmed in the note, problem list, or assessment. If the documentation is unclear, check documentation before coding.
Do not use for
Do not use this code for left eye or bilateral corneal conditions. Also avoid it when a more specific corneal diagnosis is documented, such as ulcer, scar, dystrophy, or edema.
Coding tip
Confirm both the exact corneal condition and right-eye laterality before assigning H18.891.