ICD-10 Code B26.89 – Other mumps complications (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code B26.89 – Other mumps complications
What it is
This code identifies mumps with a complication not captured by a more specific mumps code. Use it when the record confirms mumps and an additional complication, but the exact complication is not otherwise classified.
Clinical signs
Clinical features vary; refer to documentation. Mumps may be accompanied by complications such as swelling beyond the typical parotid involvement or other organ-related findings noted by the clinician.
When to use this code
Use B26.89 when the provider documents mumps plus a named complication, and no more specific ICD-10-CM code fits. It is appropriate when the chart supports a complication but does not specify a better-defined mumps category.
If the record only says “mumps” without a complication, do not use this code. You should code the uncomplicated infection instead, or check documentation for the exact complication.
Do not use for
Do not use for uncomplicated mumps or for a different viral illness with similar swelling. Do not assign it when the complication is specifically classified elsewhere.
Coding tip
Always code the mumps complication from the provider’s documentation first, then confirm whether a more specific ICD-10-CM option exists before selecting B26.89.