ICD-10 Code H10.231 – Serous conjunctivitis, except viral, right eye (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H10.231 – Serous conjunctivitis, except viral, right eye
What it is
This code identifies serous conjunctivitis affecting the right eye, excluding viral causes. Use it when the conjunctiva is inflamed with a watery or serous discharge and the documentation specifies the right eye.
Clinical signs
Typical findings include conjunctival redness, irritation, tearing, and a watery discharge. Clinical features vary; refer to documentation, especially when the record distinguishes nonviral conjunctivitis from other eye infections or allergy.
When to use this code
Use H10.231 when the provider documents serous conjunctivitis in the right eye and specifically rules out a viral cause. It is appropriate for encounter notes that describe unilateral conjunctival inflammation with serous discharge. If the laterality is not stated, check documentation.
Do not use for
Do not use this code for viral conjunctivitis, allergic conjunctivitis, or conjunctivitis of the left eye or both eyes. If the chart does not support a nonviral diagnosis, check documentation.
Coding tip
Confirm both laterality and nonviral etiology in the provider note before assigning H10.231.