ICD-10 Code H10.233 – Serous conjunctivitis, except viral, bilateral (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H10.233 – Serous conjunctivitis, except viral, bilateral
What it is
H10.233 identifies serous conjunctivitis affecting both eyes, excluding viral causes. It is used when the conjunctiva is inflamed with a watery or serous discharge and the provider documents bilateral involvement.
Clinical signs
Typical findings include redness, tearing, and a watery discharge in both eyes. Clinical features vary; refer to documentation for the exact cause and whether the condition is acute or associated with another eye disorder.
When to use this code
Use this code when the record specifically states serous conjunctivitis, nonviral, in both eyes. It fits cases where the clinician documents bilateral conjunctival inflammation with serous drainage and does not identify a viral etiology.
If the note only says conjunctivitis without laterality or cause, check documentation before coding. You should also confirm that the provider did not document a different conjunctivitis type or a separate underlying eye condition.
Do not use for
Do not use H10.233 for viral conjunctivitis or when only one eye is involved. Check documentation if the record describes allergic, bacterial, or unspecified conjunctivitis instead.
Coding tip
Verify both laterality and the nonviral cause in the provider note before assigning H10.233.