ICD-10 Code H10.0 – Mucopurulent conjunctivitis (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H10.0 – Mucopurulent conjunctivitis
What it is
H10.0 identifies mucopurulent conjunctivitis, an inflammation of the conjunctiva with mucous and pus-like discharge. Use it when documentation specifically describes this form of conjunctivitis.
Clinical signs
Typical findings include red, irritated conjunctiva and discharge that is mucous, purulent, or both. Clinical features vary; refer to documentation.
When to use this code
Use H10.0 when the provider documents mucopurulent conjunctivitis, including cases described as purulent conjunctivitis with mucous drainage. It is appropriate when the record identifies the conjunctiva as the affected site and does not specify a different conjunctivitis type. Check documentation if the note only says “eye infection” or “pink eye.”
Do not use for
Do not use this code for conjunctivitis with a clearly different cause or subtype, such as allergic or viral conjunctivitis. Do not assign it when the documentation is nonspecific; check documentation.
Coding tip
Code from the provider’s exact wording, and confirm whether the discharge is documented as mucopurulent before assigning H10.0.