ICD-10 Code H10.45 – Other chronic allergic conjunctivitis (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H10.45 – Other chronic allergic conjunctivitis
What it is
H10.45 identifies chronic allergic inflammation of the conjunctiva that does not fit a more specific allergic conjunctivitis category. Use it when the chart documents a persistent allergic eye condition.
Clinical signs
Typical findings include itchy, red, watery eyes with conjunctival irritation or swelling. Clinical features vary; refer to documentation for chronicity and allergic cause.
When to use this code
Use this code when the clinician documents chronic allergic conjunctivitis, allergic conjunctivitis NOS, or another chronic allergic conjunctival disorder without a more specific subtype. It may apply to ongoing symptoms or recurrent episodes tied to allergy. Check documentation if laterality or a different conjunctivitis type is specified.
Do not use for
Do not use H10.45 for acute allergic conjunctivitis, infectious conjunctivitis, or non-allergic eye irritation. If the record names a different conjunctival disorder, code that diagnosis instead.
Coding tip
Confirm the word “chronic” and the allergic cause in the note before assigning H10.45.