A75
Typhus fever
A75 is a non-billable ICD-10-CM code category for typhus fever. 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 A75.0 Epidemic louse-borne typhus fever due to Rickettsia prowazekii, A75.1 Recrudescent typhus [Brill's disease], A75.2 Typhus fever due to Rickettsia typhi, A75.3 Typhus fever due to Rickettsia tsutsugamushi and 1 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.
- rickettsiosis due to Ehrlichia sennetsu (A79.81)
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