2024 ICD-10-CM Diagnosis Code A75.0

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Epidemic louse-borne typhus fever due to Rickettsia prowazekii

  • A75.0 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
  • Short description: Epidemic louse-borne typhus fever d/t Rickettsia prowazekii
  • The 2024 edition of ICD-10-CM A75.0 became effective on October 1, 2023.
  • This is the American ICD-10-CM version of A75.0 – other international versions of ICD-10 A75.0 may differ.

Applicable To

  • Classical typhus (fever)
  • Epidemic (louse-borne) typhus

The following code(s) above A75.0 contain annotation back-references

 that may be applicable to A75.0:

  • A00-B99  Certain infectious and parasitic diseases
  • A75  Typhus fever

Approximate Synonyms

  • Louse-borne typhus
  • Louse-borne typhus fever due to rickettsia prowazekii

Clinical Information

  • A gram-negative bacterial infection caused by rickettsia prowazekii. It is spread by lice infected with the bacteria. Signs and symptoms include sudden headache, generalized muscle pain, malaise, and macular skin lesions. The infection may affect the central nervous system causing encephalitis.
  • The classic form of typhus, caused by rickettsia prowazekii, which is transmitted from man to man by the louse pediculus humanus corporis. This disease is characterized by the sudden onset of intense headache, malaise, and generalized myalgia followed by the formation of a macular skin eruption and vascular and neurologic disturbances.

ICD-10-CM A75.0 is grouped within Diagnostic Related Group(s) (MS-DRG v41.0):

  • 867 Other infectious and parasitic diseases diagnoses with mcc
  • 868 Other infectious and parasitic diseases diagnoses with cc
  • 869 Other infectious and parasitic diseases diagnoses without cc/mcc

Convert A75.0 to ICD-9-CMCode History

  • 2016 (effective 10/1/2015): New code (first year of non-draft ICD-10-CM)
  • 2017 (effective 10/1/2016): No change
  • 2018 (effective 10/1/2017): No change
  • 2019 (effective 10/1/2018): No change
  • 2020 (effective 10/1/2019): No change
  • 2021 (effective 10/1/2020): No change
  • 2022 (effective 10/1/2021): No change
  • 2023 (effective 10/1/2022): No change
  • 2024 (effective 10/1/2023): No change

Code annotations containing back-references to A75.0:

  • Code First: I41

Diagnosis Index entries containing back-references to A75.0:

  • Fever (inanition) (of unknown origin) (persistent) (with chills) (with rigor) R50.9
    • famine A75.0
  • Hildenbrand’s disease A75.0
  • Myocarditis (with arteriosclerosis)(chronic)(fibroid) (interstitial) (old) (progressive) (senile) I51.4
    • in (due to)
      • epidemic louse-borne typhus A75.0
  • TabardilloA75.9
    • louse-borne A75.0
  • Typhus (fever) A75.9