A77
Spotted fever [tick-borne rickettsioses]
A77 is a non-billable ICD-10-CM code category for spotted fever [tick-borne rickettsioses]. 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 A77.0 Spotted fever due to Rickettsia rickettsii, A77.1 Spotted fever due to Rickettsia conorii, A77.2 Spotted fever due to Rickettsia siberica, A77.3 Spotted fever due to Rickettsia australis and 3 more. Its coding notes include a Use additional code instruction and 5 Excludes2 entries.
Use additional code
Add the listed code as a secondary code, if known.
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.
Also from chapter/block level (1 note)
- diseases generally recognized as communicable or transmissible
More specific codes under A77 7
- A77.0Spotted fever due to Rickettsia rickettsiiBillable
- A77.1Spotted fever due to Rickettsia conoriiBillable
- A77.2Spotted fever due to Rickettsia sibericaBillable
- A77.3Spotted fever due to Rickettsia australisBillable
- A77.4EhrlichiosisHeader
- A77.8Other spotted feversBillable
- A77.9Spotted fever, unspecifiedBillable