ICD-10 Code B30.1 – Conjunctivitis due to adenovirus (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code B30.1 – Conjunctivitis due to adenovirus
What it is
B30.1 identifies conjunctivitis caused by adenovirus, a viral infection of the eye’s conjunctiva. It usually refers to infectious “pink eye” when adenovirus is the documented cause.
Clinical signs
Typical findings include red, irritated eyes, tearing, discharge, and eyelid swelling. Clinical features vary; refer to documentation for laterality, associated respiratory symptoms, or whether the infection is confirmed as adenoviral.
When to use this code
Use B30.1 when the provider documents adenoviral conjunctivitis or viral conjunctivitis due to adenovirus. It fits cases where the note clearly links the conjunctivitis to adenovirus, including outbreak-related or laboratory-supported diagnoses. Check documentation if the cause is not specified.
Do not use for
Do not use this code for bacterial, allergic, or unspecified conjunctivitis. Also avoid it when the record mentions viral conjunctivitis without naming adenovirus.
Coding tip
Code the documented organism only when the provider states adenovirus, and verify whether a more specific conjunctivitis code is supported by the record.