ICD-10 Code B26.8 – Mumps with other complications (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code B26.8 – Mumps with other complications
What it is
This code identifies mumps when the infection causes a complication not named by a more specific mumps code. Use it for documented mumps with additional organ or system involvement that is not otherwise classified.
Clinical signs
Clinical features vary; refer to documentation. Mumps commonly involves parotid swelling and may include other complication-specific findings such as orchitis, oophoritis, meningitis, or pancreatitis if recorded.
When to use this code
Use B26.8 when the provider documents mumps plus another complication and no more specific ICD-10-CM mumps code applies. It is appropriate when the complication is clearly linked to the mumps diagnosis in the record. If the chart does not specify the complication, check documentation before coding.
Do not use for
Do not use this code for uncomplicated mumps or for mumps complications that have a more specific code. Do not assign it when the suspected complication is not documented as confirmed.
Coding tip
Code the mumps complication only when the provider documents the causal link; otherwise, query for clarification.