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. A91- Dengue hemorrhagic fever
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5. 2021 ICD-10-CM Diagnosis Code A91

2021 ICD-10-CM Diagnosis Code A91

Dengue hemorrhagic fever

2016 2017 2018 2019 2020 2021 Billable/Specific Code

• A91 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 A91 became effective on October 1, 2020.
• This is the American ICD-10-CM version of A91 - other international versions of ICD-10 A91 may differ.

• A serious condition caused by dengue virus infection. Patients present with an acute febrile illness followed by restlessness, irritability, and bleeding. It may lead to hemorrhagic shock and death.
• A virulent form of dengue characterized by thrombocytopenia and an increase in vascular permeability (grades i and ii) and distinguished by a positive pain test (e.g., tourniquet pain test). When accompanied by shock (grades iii and iv), it is called dengue shock syndrome.

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

Convert A91 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

• Type 1 Excludes: A90
  , A98
  ICD-10-CM Diagnosis Code A90

  Dengue fever [classical dengue]

  2016 2017 2018 2019 2020 2021 Billable/Specific Code

  Type 1 Excludes

  • dengue hemorrhagic fever (A91)
  ICD-10-CM Diagnosis Code A98

  Other viral hemorrhagic fevers, not elsewhere classified

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

  Type 1 Excludes

  • chikungunya hemorrhagic fever (A92.0)
  • dengue hemorrhagic fever (A91)

• Bangkok hemorrhagic fever A91
• Dengue (classical) (fever) A90
  ICD-10-CM Diagnosis Code A90

  Dengue fever [classical dengue]

  2016 2017 2018 2019 2020 2021 Billable/Specific Code

  Type 1 Excludes

  • dengue hemorrhagic fever (A91)
  • hemorrhagic A91
• 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
  • dengue (virus) A90
    ICD-10-CM Diagnosis Code A90

    Dengue fever [classical dengue]

    2016 2017 2018 2019 2020 2021 Billable/Specific Code

    Type 1 Excludes

    • dengue hemorrhagic fever (A91)
    • hemorrhagic A91
  • hemorrhagic (arthropod-borne) A94
    ICD-10-CM Diagnosis Code A94

    Unspecified arthropod-borne viral fever

    2016 2017 2018 2019 2020 2021 Billable/Specific Code

    Applicable To

    • Arboviral fever NOS
    • Arbovirus infection NOS
    • Bangkok A91
    • dengue A91 (virus)
    • Philippine A91
    • Singapore A91
    • Southeast Asia A91
    • Thailand A91
  • Bangkok hemorrhagic A91
  • Philippine hemorrhagic A91
  • Singapore hemorrhagic A91
  • Southeast Asia hemorrhagic A91
  • Thailand hemorrhagic A91
• Singapore hemorrhagic fever A91
• Southeast Asian hemorrhagic fever A91
• Thailand hemorrhagic fever A91

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