ICD-10 Code H10.522 – Angular blepharoconjunctivitis, left eye (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H10.522 – Angular blepharoconjunctivitis, left eye
What it is
This code identifies angular blepharoconjunctivitis affecting the left eye. It describes inflammation at the eyelid margin and nearby conjunctiva, limited to the left side.
Clinical signs
Typical findings include redness, irritation, crusting, and inflammation near the inner or outer canthus. Clinical features vary; refer to documentation for laterality and specific exam findings.
When to use this code
Use H10.522 when the provider documents angular blepharoconjunctivitis in the left eye. Code it when the record clearly identifies the condition and laterality, even if symptoms are described more generally. Check documentation if both eyes or an unspecified eye are involved.
Do not use for
Do not use this code for right eye, bilateral, or unspecified eye cases. Also avoid it when the chart only mentions nonspecific conjunctivitis or blepharitis without angular involvement.
Coding tip
Verify the exact eye and the word “angular” in the provider note before assigning H10.522.