B05
Measles
B05 is a non-billable ICD-10-CM code category for measles. Report a more specific code from it instead. It is part of the FY2027 code set, effective October 1, 2026. The more specific codes under it are B05.0 Measles complicated by encephalitis, B05.1 Measles complicated by meningitis, B05.2 Measles complicated by pneumonia, B05.3 Measles complicated by otitis media and 3 more. Its coding notes include a Use additional code instruction, 1 Excludes1 entry and 5 Excludes2 entries.
Use additional code
Add the listed code as a secondary code, if known.
Excludes1
Not coded here. The listed conditions generally should not be reported together.
- subacute sclerosing panencephalitis (A81.1)
Excludes2
Not included here. Both codes may be reported if the patient has both conditions.
Also from chapter/block level (5 notes)
- carrier or suspected carrier of infectious disease (Z22.-)
- certain localized infections - see body system-related chapters
- infectious and parasitic diseases complicating pregnancy, childbirth and the puerperium (O98.-)
- infectious and parasitic diseases specific to the perinatal period (P35-P39)
- influenza and other acute respiratory infections (J00-J22)
Includes
Further defines or gives examples of the content of the category.
- morbilli
Also from chapter/block level (1 note)
- diseases generally recognized as communicable or transmissible
More specific codes under B05 7
- B05.0Measles complicated by encephalitisBillable
- B05.1Measles complicated by meningitisBillable
- B05.2Measles complicated by pneumoniaBillable
- B05.3Measles complicated by otitis mediaBillable
- B05.4Measles with intestinal complicationsBillable
- B05.8Measles with other complicationsHeader
- B05.9Measles without complicationBillable