ICD-10 Code H11.9 – Unspecified disorder of conjunctiva (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H11.9 – Unspecified disorder of conjunctiva
What it is
H11.9 identifies a conjunctival disorder when the record does not specify the exact condition. Use it for problems involving the conjunctiva, the thin membrane covering the eye and inner eyelids, when documentation is nonspecific.
Clinical signs
Clinical features vary; refer to documentation. Commonly, the chart may note conjunctival irritation, redness, swelling, or other nonspecific abnormalities without naming a definitive diagnosis.
When to use this code
Use this code when the provider documents a conjunctival disorder but does not describe the exact type, such as inflammation, lesion, or other defined condition. It is appropriate when the assessment remains vague after the encounter note.
If a more specific conjunctival diagnosis is recorded elsewhere in the chart, code that condition instead. When details are missing or conflicting, check documentation before defaulting to H11.9.
Do not use for
Do not use this code for clearly specified conjunctival conditions, such as a documented named disorder. Also avoid it when the problem is better explained by another ocular diagnosis.
Coding tip
Query the provider for specificity if the conjunctival condition is described but not named.