ICD-10 Code H11.439 – Conjunctival hyperemia, unspecified eye (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H11.439 – Conjunctival hyperemia, unspecified eye
What it is
Use this code for redness of the conjunctiva in an unspecified eye when the record identifies conjunctival hyperemia but does not specify laterality or another underlying cause. It describes a finding, not a full diagnosis.
Clinical signs
Common documentation includes visible conjunctival redness or injection, often noted on eye exam. Clinical features vary; refer to documentation for whether the finding is unilateral, bilateral, or associated with irritation.
When to use this code
Assign H11.439 when the provider documents conjunctival hyperemia and does not identify the eye involved. Use it for encounter notes that describe redness of the conjunctiva without a more specific conjunctival disorder. If the chart names a different cause, code that condition instead.
Do not use for
Do not use this code when the record identifies a specific eye, such as right or left, or when the redness is documented as part of another conjunctival diagnosis. Check documentation.
Coding tip
Query for laterality and underlying cause before coding, because “unspecified eye” should be used only when the documentation stays nonspecific.