ICD-10 Code H10.31 – Unspecified acute conjunctivitis, right eye (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H10.31 – Unspecified acute conjunctivitis, right eye
What it is
H10.31 identifies an acute inflammation of the conjunctiva in the right eye when the specific cause is not documented. Use it when the record states acute conjunctivitis but does not name bacterial, viral, allergic, or other specified type.
Clinical signs
Typical findings include a red, irritated right eye with tearing, discharge, or a gritty sensation. Clinical features vary; refer to documentation.
When to use this code
Use this code when the clinician documents acute conjunctivitis limited to the right eye and does not specify the etiology. It also fits notes that describe conjunctival inflammation, redness, or discharge in the right eye without further detail. If laterality or cause is clarified, code more specifically.
Do not use for
Do not use H10.31 for chronic conjunctivitis, allergic conjunctivitis, or conjunctivitis with a documented infectious cause. Check documentation if the record names both eyes or a different eye condition.
Coding tip
Capture laterality and specificity from the provider note; if the cause is stated, choose the more specific conjunctivitis code.