ICD-10 Code H15.109 – Unspecified episcleritis, unspecified eye (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H15.109 – Unspecified episcleritis, unspecified eye
What it is
H15.109 identifies episcleritis when the affected eye is not specified. Episcleritis is inflammation of the episclera, the thin tissue between the conjunctiva and sclera.
Clinical signs
Typical findings include localized eye redness, mild discomfort, and tenderness. Clinical features vary; refer to documentation if the note does not clearly identify the eye or the episcleral location.
When to use this code
Use H15.109 when the provider documents episcleritis but does not state whether it is right, left, or bilateral. It also fits when the record confirms episcleritis without enough detail to assign a more specific eye code. Code from the documented diagnosis, not from presumed laterality.
Do not use for
Do not use this code for scleritis, conjunctivitis, or nonspecific eye redness without a diagnosis of episcleritis. If the eye is documented, choose the more specific laterality code instead.
Coding tip
Check the assessment for laterality and specificity before assigning H15.109.