ICD-10 Code H16.33 – Sclerosing keratitis (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H16.33 – Sclerosing keratitis
What it is
H16.33 identifies sclerosing keratitis, a corneal condition in which the cornea becomes inflamed and progressively scarred or hardened. Use it when the documentation specifically names sclerosing keratitis.
Clinical signs
Typical findings may include corneal haze, opacification, and reduced visual clarity. Clinical features vary; refer to documentation for the exact pattern, laterality, and severity.
When to use this code
Use H16.33 when the provider documents sclerosing keratitis as the diagnosis, including ophthalmology notes or problem lists. It is appropriate when the record supports corneal sclerosis or scarring consistent with this condition. Check documentation if the note only says “keratitis” without the sclerosing qualifier.
Do not use for
Do not use this code for nonspecific keratitis, corneal abrasion, or conjunctivitis. If the chart does not clearly confirm sclerosing keratitis, check documentation before coding.
Coding tip
Query for laterality and any underlying cause if the record is incomplete, because ICD-10-CM coding often depends on those details.