Typhus fever (A75) ICD-10-CM
The A75 code range covers typhus fever with 6 ICD-10-CM diagnosis codes. 5 of them are billable and valid for claim submission in fiscal year 2026, and the category headers group them but cannot themselves be billed.
Type 1 Excludes
A type 1 excludes note is a pure excludes note. It means "NOT CODED HERE!" An Excludes1 note indicates that the code excluded should never be used at the same time as the code above the Excludes1 note. An Excludes1 is used when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.
- rickettsiosis due to Ehrlichia sennetsu A79.81
Codes in the A75 Range 6 codes · 5 billable
Clinical Terms in This Code Range
Definitions from the National Library of Medicine for conditions coded in the A75 range.
Orientia tsutsugamushi
A gram-negative, rod-shaped to coccoid bacterium. It is the etiologic agent of SCRUB TYPHUS in humans and is transmitted by mites from rodent reservoirs.
Scrub Typhus
An acute infectious disease caused by ORIENTIA TSUTSUGAMUSHI. It is limited to eastern and southeastern Asia, India, northern Australia, and the adjacent islands. Characteristics include the formation of a primary cutaneous lesion at the site of the bite of an infected mite, fever lasting about two weeks, and a maculopapular rash.
About the A75 Code Range
ICD-10 codes for typhus fever (A75) are used to classify various forms of typhus caused by different rickettsial bacteria. These codes specify distinct types such as epidemic louse-borne typhus, recrudescent (Brill’s) typhus, murine typhus, scrub typhus, and unspecified typhus infections.
These codes help healthcare providers accurately document conditions like louse-borne typhus (A75.0), also known as typhus group rickettsial disease, caused by Rickettsia prowazekii. The code A75.1 covers Brill-Zinsser disease, a recrudescent form of typhus. Murine typhus (A75.2), caused by Rickettsia typhi, and scrub typhus (A75.3) due to Rickettsia tsutsugamushi (also called infection caused by Orientia) are also specifically identified. When the exact type is unknown, code A75.9 applies to unspecified typhus fever. Using these ICD-10 codes ensures precise classification and supports epidemiological tracking of these parasitic rickettsial diseases.
Questions About This Page
How many billable codes are in the A75 range?
Of the 6 codes in this range, 5 are billable and valid for claim submission from October 1, 2025 through September 30, 2026. Category header codes group them but cannot be reported on claims.
What does the A75 range classify?
The range classifies typhus fever. Each code links to its own reference page with billing status, MS-DRG grouping, coding notes, and clinical information.
Related References
Source: CMS FY 2026 ICD-10-CM Tabular List and order file, effective October 1, 2025 through September 30, 2026.
