ICD-10 Code H10.503 – Unspecified blepharoconjunctivitis, bilateral (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H10.503 – Unspecified blepharoconjunctivitis, bilateral
What it is
This code identifies inflammation affecting both the eyelids and conjunctiva when the provider does not document a specific cause or type. Use it when the condition is bilateral and remains unspecified in the record.
Clinical signs
Typical findings include red, irritated eyes with eyelid inflammation, conjunctival injection, tearing, itching, or discharge. Clinical features vary; refer to documentation.
When to use this code
Use H10.503 when the chart documents blepharoconjunctivitis in both eyes but does not name an allergic, infectious, or other specific form. It also fits when the provider confirms bilateral involvement and leaves the etiology unspecified. Check documentation if laterality or cause is clearer elsewhere in the record.
Do not use for
Do not use this code for unilateral blepharoconjunctivitis or for a more specific documented diagnosis, such as allergic or infectious conjunctivitis. If the record names another condition, code that diagnosis instead.
Coding tip
Verify bilateral involvement and the absence of a more specific etiology before assigning H10.503.