ICD-10 Code for Typhus

The default ICD-10-CM 2027 code for typhus (fever) is A75.9 – Typhus fever, unspecified. More specific codes depend on the details documented, as listed in the official index (12 codes, 12 billable).

Main code: A75.9 – Typhus fever, unspecified
Billable: Yes

Index entries for Typhus

abdominal, abdominalis – see Typhoid
African tick – A77.1
amarillic – A95.9
brain – A75.9 – G94 [manifestation]
cerebral – A75.9 – G94 [manifestation]
classical – A75.0
due to Rickettsia
- prowazekii – A75.0
  - recrudescent – A75.1
- tsutsugamushi – A75.3
- typhi – A75.2
endemic (flea-borne) – A75.2
epidemic (louse-borne) – A75.0
exanthematic NEC – A75.0
exanthematicus SAI – A75.0
- brillii SAI – A75.1
- mexicanus SAI – A75.2
- typhus murinus – A75.2
flea-borne – A75.2
India tick – A77.1
Kenya (tick) – A77.1
louse-borne – A75.0
Mexican – A75.2
mite-borne – A75.3
murine – A75.2
North Asian tick-borne – A77.2
Orientia Tsutsugamushi (scrub typhus) – A75.3
petechial – A75.9
Queensland tick – A77.3
rat – A75.2
recrudescent – A75.1
recurrens – see Fever, relapsing
Sao Paulo – A77.0
scrub (China) (India) (Malaysia) (New Guinea) – A75.3
shop (of Malaysia) – A75.2
Siberian tick – A77.2
tick-borne – A77.9
tropical (mite-borne) – A75.3

How to choose the right code

Start with the main term, then pick the indented subterm that matches the documentation (type, cause, site, laterality, episode of care). Always confirm the code in the tabular list: follow its Excludes1/Excludes2, “code first” and “use additional code” notes, and add a 7th character where required.

Source: CDC/NCHS ICD-10-CM FY2027 alphabetic index.