1. ICD-10-CM Codes
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2. A00-B99
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3. A75-A79
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4. A75-
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5. 2023 ICD-10-CM Diagnosis Code A75.9

2023 ICD-10-CM Diagnosis Code A75.9

Typhus fever, unspecified

2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code

• A75.9 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
• The 2023 edition of ICD-10-CM A75.9 became effective on October 1, 2022.
• This is the American ICD-10-CM version of A75.9 - other international versions of ICD-10 A75.9 may differ.

• Typhus fever
• Typhus group rickettsial disease

• Group of acute, arthropod borne infections caused by rickettsiae; includes epidemic (classic or louse-borne) typhus, its recrudescent form, and murine (endemic or flea-borne) typhus; all are characterized by severe headache, chills, high fever, stupor, and rash.

• 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 A75.9 to ICD-9-CM

• 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

• Code First: I41
  ICD-10-CM Diagnosis Code I41

  Myocarditis in diseases classified elsewhere

  2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code Manifestation Code

  Code First

  • underlying disease, such as:
  • typhus (A75.0-A75.9)

  Type 1 Excludes

  • myocarditis (in):
  • Chagas' disease (chronic) (B57.2)
  • acute (B57.0)
  • coxsackie (virus) infection (B33.22)
  • diphtheritic (A36.81)
  • gonococcal (A54.83)
  • influenzal (J09.X9, J10.82, J11.82)
  • meningococcal (A39.52)
  • mumps (B26.82)
  • rheumatoid arthritis (M05.31)
  • sarcoid (D86.85)
  • syphilis (A52.06)
  • toxoplasmosis (B58.81)
  • tuberculous (A18.84)

• Canton fever A75.9
• Fever (inanition) (of unknown origin) (persistent) (with chills) (with rigor) R50.9
  ICD-10-CM Diagnosis Code R50.9

  Fever, unspecified

  2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code

  Applicable To

  • Fever NOS
  • Fever of unknown origin [FUO]
  • Fever with chills
  • Fever with rigors
  • Hyperpyrexia NOS
  • Persistent fever
  • Pyrexia NOS
  • Canton A75.9
• Infection, infected, infective (opportunistic) B99.9
  ICD-10-CM Diagnosis Code B99.9

  Unspecified infectious disease

  2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code
  • typhus A75.9
• Myocarditis (with arteriosclerosis)(chronic)(fibroid) (interstitial) (old) (progressive) (senile) I51.4
  ICD-10-CM Diagnosis Code I51.4

  Myocarditis, unspecified

  2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code

  Applicable To

  • Chronic (interstitial) myocarditis
  • Myocardial fibrosis
  • Myocarditis NOS

  Type 1 Excludes

  • acute or subacute myocarditis (I40.-)
  • in (due to)
    • typhus NEC A75.9
• Petechial typhus A75.9
• Tabardillo A75.9
• Typhus (fever) A75.9
  • brain A75.9
  • cerebral A75.9
  • petechial A75.9

Reimbursement claims with a date of service on or after October 1, 2015 require the use of ICD-10-CM codes.