ICD-10 Code H16.31 – Corneal abscess (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H16.31 – Corneal abscess
What it is
H16.31 identifies a corneal abscess, which is a localized infectious collection in the cornea. Use it when documentation specifically states an abscess of the cornea.
Clinical signs
Typical findings include a focal corneal infiltrate or ulcer with surrounding inflammation, pain, redness, tearing, and reduced vision. Clinical features vary; refer to documentation.
When to use this code
Use H16.31 when the provider documents corneal abscess, corneal suppuration, or a clearly localized infected corneal lesion. It may also apply when the note describes a corneal abscess without naming the organism. Check documentation if the record only says keratitis or corneal ulcer.
Do not use for
Do not use this code for nonspecific eye redness, conjunctivitis, or a corneal abrasion without infection. If the chart does not confirm an abscess, check documentation.
Coding tip
Code H16.31 only when the corneal abscess is explicitly documented; otherwise, query or verify the diagnosis.