ICD-10 Code B06 – Rubella [German measles] (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code B06 – Rubella [German measles]
What it is
B06 identifies rubella, a contagious viral infection also known as German measles. Use it for documented rubella infection, including cases with rash and other typical viral illness features.
Clinical signs
Common findings include a mild maculopapular rash, low-grade fever, and lymph node enlargement, especially behind the ears or at the back of the neck. Clinical features vary; refer to documentation.
When to use this code
Use B06 when the provider documents rubella or German measles as the diagnosis. It may also apply when the record clearly identifies rubella infection, even if the presentation is mild or uncomplicated. Check documentation if the note only suggests a viral exanthem without confirmation.
Do not use for
Do not use B06 for measles, nonspecific rash, or other viral exanthems. If the chart does not confirm rubella, use the documented condition or check documentation.
Coding tip
Code B06 only when rubella is explicitly documented; if the diagnosis is uncertain, you should not assume it from rash alone.