ICD-10 Code H10.423 – Simple chronic conjunctivitis, bilateral (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H10.423 – Simple chronic conjunctivitis, bilateral
What it is
H10.423 identifies chronic inflammation of both conjunctivae that is described as simple. Use it when documentation clearly states bilateral simple chronic conjunctivitis.
Clinical signs
Typical findings include persistent conjunctival redness, irritation, and discharge or tearing. Clinical features vary; refer to documentation.
When to use this code
Use this code when the provider documents simple chronic conjunctivitis affecting both eyes, not an acute or allergic form. It fits ongoing conjunctival inflammation recorded as bilateral in the assessment or diagnosis. Check documentation if the laterality is unclear.
Do not use for
Do not use it for acute conjunctivitis, allergic conjunctivitis, or other specified chronic conjunctival disorders unless documented. If the record does not confirm bilateral involvement, check documentation.
Coding tip
Confirm both the chronic nature and bilateral laterality before assigning H10.423.