ICD-10 Code for Typhus
Also indexed as (fever)
The ICD-10-CM code for typhus is A75.9 — Typhus fever, unspecified. This is the code the Alphabetic Index gives for typhus with no further qualifier, valid for FY2027 (October 1, 2026 – September 30, 2027).
A75.9 is billable but unspecified. If the documentation names a type, site or cause, one of the more specific codes below is likely expected.
Which typhus code should you use?
The Alphabetic Index lists 12 codes under Typhus. Which one applies depends on the qualifier documented in the record — the type, site, cause, or associated condition. Find the qualifier below, then verify the code in the Tabular List before using it.
By type
| African tick | A77.1 | Spotted fever due to Rickettsia conorii | |
| amarillic | A95.9 | Yellow fever, unspecified | |
| brain | A75.9 | Typhus fever, unspecified | |
| cerebral | A75.9 | Typhus fever, unspecified | |
| classical | A75.0 | Epidemic louse-borne typhus fever due to Rickettsia prowazekii | |
| endemic | A75.2 | Typhus fever due to Rickettsia typhi | |
| epidemic | A75.0 | Epidemic louse-borne typhus fever due to Rickettsia prowazekii | |
| exanthematic NEC | A75.0 | Epidemic louse-borne typhus fever due to Rickettsia prowazekii | |
| exanthematicus SAI | A75.0 | Epidemic louse-borne typhus fever due to Rickettsia prowazekii | |
| flea-borne | A75.2 | Typhus fever due to Rickettsia typhi | |
| India tick | A77.1 | Spotted fever due to Rickettsia conorii | |
| Kenya | A77.1 | Spotted fever due to Rickettsia conorii | |
| louse-borne | A75.0 | Epidemic louse-borne typhus fever due to Rickettsia prowazekii | |
| Mexican | A75.2 | Typhus fever due to Rickettsia typhi | |
| mite-borne | A75.3 | Typhus fever due to Rickettsia tsutsugamushi | |
| murine | A75.2 | Typhus fever due to Rickettsia typhi | |
| North Asian tick-borne | A77.2 | Spotted fever due to Rickettsia siberica | |
| Orientia Tsutsugamushi | A75.3 | Typhus fever due to Rickettsia tsutsugamushi | |
| petechial | A75.9 | Typhus fever, unspecified | |
| Queensland tick | A77.3 | Spotted fever due to Rickettsia australis | |
| rat | A75.2 | Typhus fever due to Rickettsia typhi | |
| recrudescent | A75.1 | Recrudescent typhus [Brill's disease] | |
| Sao Paulo | A77.0 | Spotted fever due to Rickettsia rickettsii | |
| scrub | A75.3 | Typhus fever due to Rickettsia tsutsugamushi | |
| shop | A75.2 | Typhus fever due to Rickettsia typhi | |
| Siberian tick | A77.2 | Spotted fever due to Rickettsia siberica | |
| tick-borne | A77.9 | Spotted fever, unspecified | |
| tropical | A75.3 | Typhus fever due to Rickettsia tsutsugamushi |
Typhus due to Rickettsia
Index terms and codes are reproduced from the official ICD-10-CM FY2027 release. The Alphabetic Index is a finding aid — a code must always be verified in the Tabular List before it is reported. Data sources