ICD-10 Code B96.3 – Hemophilus influenzae [H. influenzae] as the cause of diseases classified elsewhere (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code B96.3 – Hemophilus influenzae [H. influenzae] as the cause of diseases classified elsewhere
What it is
B96.3 identifies Haemophilus influenzae as the infectious cause of another condition, not the primary diagnosis. Use it only when the record links H. influenzae to a disease classified elsewhere.
Clinical signs
Clinical features vary; refer to documentation. The chart should show a condition caused by H. influenzae, such as a linked infection, with the organism identified or clearly documented as the cause.
When to use this code
Use B96.3 as an additional code when H. influenzae is documented as the etiologic agent of another disease. Pair it with the code for the underlying condition, such as an infection or inflammatory process. If the causal relationship is not stated, check documentation before assigning it.
Do not use for
Do not use B96.3 as the principal diagnosis or for unspecified bacterial infections. Do not assign it when H. influenzae is only a historical finding or not clearly linked to the current condition.
Coding tip
Always code the underlying disease first, then add B96.3 only when the provider documents H. influenzae as the cause.