ICD-10 Code B94 – Sequelae of other and unspecified infectious and parasitic diseases (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code B94 – Sequelae of other and unspecified infectious and parasitic diseases
What it is
B94 identifies late effects that remain after an infectious or parasitic disease has ended. Use it when the active infection is no longer present, but a residual condition is still being documented.
Clinical signs
Clinical features vary; refer to documentation. You may see persistent organ damage, scarring, weakness, or other residual findings clearly linked to a prior infection rather than ongoing disease.
When to use this code
Use B94 when the provider documents a sequela from a past infectious or parasitic illness and no more specific sequela code is available. The current problem should be described as a residual effect, not an active infection. Check the record for the original infection and the lasting condition.
Do not use for
Do not use this code for active infection, suspected infection, or routine follow-up after treatment. If the chart identifies a more specific sequela code, use that instead.
Coding tip
Code the residual condition first when documented, and add B94 only when the sequela is linked to a prior infectious or parasitic disease.