ICD-10 Code B97.32 – Oncovirus as the cause of diseases classified elsewhere (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code B97.32 – Oncovirus as the cause of diseases classified elsewhere
What it is
B97.32 identifies an oncovirus documented as the cause of another disease classified elsewhere. Use it when the record links a viral oncogenic agent to the primary condition, not as a standalone diagnosis.
Clinical signs
Clinical features vary; refer to documentation. The chart should show evidence that an oncovirus is implicated in the patient’s condition, with the main disease coded separately.
When to use this code
Use B97.32 when the provider states that an oncovirus is the cause of a reported condition and the underlying disease has its own code. This is a supplementary code, so you should sequence it with the primary diagnosis. Check documentation if the viral cause is implied but not clearly stated.
Do not use for
Do not use this code for the primary disease itself or for a general history of viral exposure. If the record does not identify an oncovirus as causal, choose a more specific documented diagnosis.
Coding tip
Always code the condition being treated first, then add B97.32 only when the provider documents the oncovirus link.