1. ICD-10-CM Codes
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2. A00-B99 Certain infectious and parasitic diseases
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3. A90-A99 Arthropod-borne viral fevers and viral hemorrhagic fevers
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4. A93- Other arthropod-borne viral fevers, not elsewhere classified
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5. 2021 ICD-10-CM Diagnosis Code A93.2

2021 ICD-10-CM Diagnosis Code A93.2

Colorado tick fever

2016 2017 2018 2019 2020 2021 Billable/Specific Code

• A93.2 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 A93.2 became effective on October 1, 2020.
• This is the American ICD-10-CM version of A93.2 - other international versions of ICD-10 A93.2 may differ.

• A febrile illness characterized by chills, aches, vomiting, leukopenia, and sometimes encephalitis. It is caused by the colorado tick fever virus, a reovirus transmitted by the tick dermacentor andersoni.

• 865 Viral illness with mcc
• 866 Viral illness without mcc

Convert A93.2 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

• American
  • mountain tick fever A93.2
• 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
  • American
    • mountain A93.2 (tick)
  • mountain - see also Brucellosis
    • tick A93.2 (American) (Colorado) (viral)
  • tick
    • American mountain A93.2
    • Colorado A93.2
    • mountain A93.2
    • nonexanthematous A93.2
  • Colorado tick A93.2 (virus)
  • non-exanthematous tick A93.2
• Mountain
  • tick fever A93.2
• Nonexanthematous tick fever A93.2

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