ICD-10 Code B26.9 – Mumps without complication (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code B26.9 – Mumps without complication
What it is
B26.9 identifies mumps when the infection is present but no specific complication is documented. Use it for a confirmed mumps diagnosis without orchitis, meningitis, encephalitis, or other stated complications.
Clinical signs
Typical mumps features include fever, malaise, headache, and painful swelling of the salivary glands, especially the parotid glands. Clinical features vary; refer to documentation.
When to use this code
Use B26.9 when the provider documents mumps and does not describe a complication. It also fits cases where the record notes parotitis or classic mumps infection without further detail. If the chart names a complication, code that condition instead.
Do not use for
Do not use this code for mumps with orchitis, meningitis, encephalitis, or other documented complications. Also avoid it when mumps is only suspected or when documentation is insufficient; Check documentation.
Coding tip
Look for the word “without complication” or the absence of any complication note before assigning B26.9.