ICD-10 Code H16.012 – Central corneal ulcer, left eye (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H16.012 – Central corneal ulcer, left eye
What it is
H16.012 identifies a corneal ulcer located in the center of the left eye. It means there is a focal breakdown of the corneal surface, usually documented as an ulcer rather than a nonspecific corneal abrasion.
Clinical signs
Typical findings include eye pain, redness, tearing, light sensitivity, and reduced vision. Exam documentation may note a central corneal epithelial defect, stromal infiltrate, or an ulcer with surrounding inflammation.
When to use this code
Use this code when the provider documents a central corneal ulcer specifically in the left eye. It is appropriate when the record clearly identifies ulcer location and laterality, even if the cause is not yet fully defined. Check documentation if the note only says corneal ulcer without location.
Do not use for
Do not use this code for corneal abrasion, keratitis without ulceration, or ulcers in another eye or corneal location. If the documentation is vague, check documentation before assigning H16.012.
Coding tip
Verify both laterality and the word “central” in the ophthalmology note before coding H16.012.