ICD-10 Code H10.403 – Unspecified chronic conjunctivitis, bilateral (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H10.403 – Unspecified chronic conjunctivitis, bilateral
What it is
This code identifies long-lasting inflammation of both conjunctivae when the cause is not specified. Use it when the record documents chronic conjunctivitis affecting both eyes, but does not name a more specific type.
Clinical signs
Typical findings include persistent redness, irritation, tearing, and discharge in both eyes. Clinical features vary; refer to documentation when the chart does not clearly describe the chronic pattern or bilateral involvement.
When to use this code
Use H10.403 when the provider documents chronic conjunctivitis in both eyes and no specific etiology, such as allergic, viral, or bacterial, is stated. It also applies when the note clearly says “unspecified” chronic conjunctivitis bilaterally. If laterality is unclear or only one eye is documented, check documentation before coding.
Do not use for
Do not use this code for acute conjunctivitis, a single-eye condition, or conjunctivitis with a documented specific cause. If the record identifies another conjunctival disorder, choose the more specific code.
Coding tip
Confirm both chronicity and bilateral laterality in the provider note before assigning H10.403.