ICD-10 Code B08.0 – Other Orthopoxvirus Infections (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code B08.0 – Other orthopoxvirus infections
What it is
B08.0 identifies infections caused by orthopoxviruses other than the specific entities named elsewhere in ICD-10-CM. Use it for a documented orthopoxvirus infection when the record does not specify a more exact code.
Clinical signs
Clinical features vary; refer to documentation. Orthopoxvirus infections may present with fever, malaise, and a characteristic rash or skin lesions, but the exact pattern depends on the documented virus.
When to use this code
Use B08.0 when the clinician documents an orthopoxvirus infection and no more specific diagnosis is available. It also fits cases where the organism is confirmed only as an orthopoxvirus, or the note lacks detail for a narrower code.
If the chart names a specific orthopoxvirus condition, code that diagnosis instead. Check documentation carefully for the exact virus, exposure history, and any more specific site or syndrome wording.
Do not use for
Do not use this code for unspecified viral exanthems or rashes without orthopoxvirus documentation. Also avoid it when a more specific orthopoxvirus diagnosis is recorded. Check documentation.
Coding tip
Code the most specific orthopoxvirus term documented, and query if the note only says “poxvirus” or “viral rash.”