ICD-10 Code H10.502 – Unspecified blepharoconjunctivitis, left eye (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H10.502 – Unspecified blepharoconjunctivitis, left eye
What it is
This code identifies inflammation involving both the eyelid and conjunctiva in the left eye, without a more specific cause or type documented. Use it when the record states blepharoconjunctivitis but does not clarify the exact etiology.
Clinical signs
Typical findings include red eye, eyelid irritation, swelling, discharge, tearing, and crusting along the lid margin. Clinical features vary; refer to documentation.
When to use this code
Use H10.502 when the provider documents unspecified blepharoconjunctivitis affecting only the left eye. It fits cases where the note confirms combined eyelid and conjunctival inflammation, but does not name an infectious, allergic, or other specific form. Check documentation if laterality or specificity is unclear.
Do not use for
Do not use this code for blepharoconjunctivitis of the right eye, both eyes, or an unspecified eye. Also avoid it when the record gives a more specific diagnosis, such as allergic or infectious conjunctivitis.
Coding tip
Confirm both laterality and the word “unspecified” in the provider note before assigning H10.502.