1. ICD-10-CM Codes
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2. A00-B99
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3. B25-B34
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4. B33-
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5. 2023 ICD-10-CM Diagnosis Code B33.1

2023 ICD-10-CM Diagnosis Code B33.1

Ross River disease

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

• B33.1 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 B33.1 became effective on October 1, 2022.
• This is the American ICD-10-CM version of B33.1 - other international versions of ICD-10 B33.1 may differ.

• Ross river fever

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

Convert B33.1 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

• Type 1 Excludes: A92
  ICD-10-CM Diagnosis Code A92

  Other mosquito-borne viral fevers

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

  Type 1 Excludes

  • Ross River disease (B33.1)

• Disease, diseased - see also Syndrome
  • Ross River B33.1
• 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
  • Ross River B33.1
• Polyarthritis, polyarthropathy M13.0
  - see also Arthritis
  ICD-10-CM Diagnosis Code M13.0

  Polyarthritis, unspecified

  2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code
  • epidemic B33.1 (Australian) (with exanthema)
• Ross River disease or fever B33.1

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