1. ICD-10-CM Codes
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2. A00-B99 Certain infectious and parasitic diseases
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3. A75-A79 Rickettsioses
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4. A77- Spotted fever [tick-borne rickettsioses]
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5. 2021 ICD-10-CM Diagnosis Code A77.3

2021 ICD-10-CM Diagnosis Code A77.3

Spotted fever due to Rickettsia australis

2016 2017 2018 2019 2020 2021 Billable/Specific Code

• A77.3 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
• The 2021 edition of ICD-10-CM A77.3 became effective on October 1, 2020.
• This is the American ICD-10-CM version of A77.3 - other international versions of ICD-10 A77.3 may differ.

• Queensland tick typhus

• Acute infectious disease caused by coxiella burnetii; characterized by a sudden onset of fever,headache, malaise, and weakness; in humans, it is commonly contracted by inhalation of infected dusts derived from infected domestic animals.

• 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 A77.3 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

• 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 Billable/Specific Code

  Applicable To

  • Fever NOS
  • Fever of unknown origin [FUO]
  • Fever with chills
  • Fever with rigors
  • Hyperpyrexia NOS
  • Persistent fever
  • Pyrexia NOS
  • spotted A77.9
    ICD-10-CM Diagnosis Code A77.9

    Spotted fever, unspecified

    2016 2017 2018 2019 2020 2021 Billable/Specific Code

    Applicable To

    • Tick-borne typhus NOS
    • due to Rickettsia
      • australis A77.3
  • Queensland A77.3 (coastal) (tick)
• Queensland fever A77.3
• Typhus (fever) A75.9
  ICD-10-CM Diagnosis Code A75.9

  Typhus fever, unspecified

  2016 2017 2018 2019 2020 2021 Billable/Specific Code

  Applicable To

  • Typhus (fever) NOS
  • Queensland tick A77.3

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