ICD-10 Code H10.10 – Acute atopic conjunctivitis, unspecified eye (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H10.10 – Acute atopic conjunctivitis, unspecified eye
What it is
H10.10 identifies acute atopic conjunctivitis affecting an unspecified eye. Use it for an allergic-type conjunctival inflammation when the provider documents atopic conjunctivitis but does not specify left or right eye.
Clinical signs
Typical findings include red, itchy, watery eyes with conjunctival irritation. Clinical features vary; refer to documentation for the affected eye and whether the episode is acute.
When to use this code
Use H10.10 when the record states acute atopic conjunctivitis and the laterality is not documented. It also fits encounters focused on evaluation of allergic conjunctival inflammation without a more specific eye designation. If the note identifies a different conjunctivitis type, do not use this code.
Do not use for
Do not use this code for bacterial, viral, or nonspecific conjunctivitis. If the documentation names a specific eye or another ocular disorder, check documentation and code the more precise diagnosis.
Coding tip
Always confirm laterality first; if the eye is specified, choose the more detailed code instead of H10.10.