ICD-10 Code B10 – Other human herpesviruses (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code B10 – Other human herpesviruses
What it is
B10 identifies infections caused by human herpesviruses not classified elsewhere in the ICD-10-CM system. Use it when the documentation names an “other” human herpesvirus and no more specific code is available.
Clinical signs
Clinical features vary by the specific herpesvirus involved and the site of infection. You may see fever, rash, mucocutaneous lesions, lymphadenopathy, or organ-specific findings; check documentation.
When to use this code
Use B10 when the provider documents a human herpesvirus infection that is not otherwise classified and does not specify a more exact ICD-10-CM code. It may apply when the record clearly identifies an “other” herpesvirus or an unspecified type within that group. If the organism is named differently, code the documented condition instead.
Do not use for
Do not use B10 for herpes simplex, varicella, zoster, or cytomegalovirus infections, which have separate codes. Avoid it when the chart gives a more specific herpesvirus diagnosis.
Coding tip
Always match B10 to the exact wording in the provider note and verify that no more specific herpesvirus code applies.