ICD-10 Code H10 – Conjunctivitis (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H10 – Conjunctivitis
What it is
H10 identifies conjunctivitis, an inflammation of the conjunctiva, the thin tissue covering the white of the eye and inner eyelids. Use it when the record documents conjunctival inflammation without a more specific subtype.
Clinical signs
Typical findings include red or pink eyes, irritation, tearing, discharge, and eyelid crusting. Clinical features vary; refer to documentation.
When to use this code
Use H10 when the provider diagnoses conjunctivitis but does not specify a bacterial, viral, allergic, or other subtype. It also fits nonspecific eye redness with documented conjunctival inflammation. Check documentation if the note names a more detailed condition.
Do not use for
Do not use H10 for corneal disease, eyelid disorders, or isolated eye irritation without conjunctival involvement. If the record identifies a specific conjunctivitis type, code that more precise diagnosis instead.
Coding tip
Review the assessment for laterality and cause, because a more specific conjunctivitis code may be available.