2024 ICD-10-CM Diagnosis Code A99

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Unspecified viral hemorrhagic fever

  • A99 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
  • The 2024 edition of ICD-10-CM A99 became effective on October 1, 2023.
  • This is the American ICD-10-CM version of A99 – other international versions of ICD-10 A99 may differ.

The following code(s) above A99 contain annotation back-references

 that may be applicable to A99:

  • A00-B99  Certain infectious and parasitic diseases

Clinical Information

  • A group of viral diseases of diverse etiology but having many similar clinical characteristics; increased capillary permeability, leukopenia, and thrombocytopenia are common to all. Hemorrhagic fevers are characterized by sudden onset, fever, headache, generalized myalgia, backache, conjunctivitis, and severe prostration, followed by various hemorrhagic symptoms. Hemorrhagic fever with kidney involvement is hemorrhagic fever with renal syndrome.
  • Syndrome that occurs in perhaps 20-40 percent of infections by a number of different viruses of the families arenaviridae, bunyaviridae, flaviviridae, filoviridae, etc; some types of hemorrhagic fever are tick borne, others mosquito borne, and some seem to be zoonoses; clinical manifestations are high fever, scattered petechiae, gastrointestinal tract and other organ bleeding, hypotension, and shock; kidney damage may be severe and neurologic signs may appear.
  • Viral hemorrhagic fevers (vhfs) are a group of illnesses caused by four families of viruses. These include the ebola and marburg viruses and lassa fever virus. Vhfs have common features: they affect many organs, they damage the blood vessels and they affect the body’s ability to regulate itself. Some vhfs cause mild disease, but some, like ebola or marburg, cause severe disease and death.vhfs are found around the world. Specific diseases are usually limited to areas where the animals that carry them live. For example, lassa fever is limited to rural areas of west africa where rats and mice carry the virus.the risk for travelers is low, but you should avoid visiting areas where there are disease outbreaks. Because there are no effective treatments for some of these viral infections, there is concern about their use in bioterrorism. Centers for Disease Control and Prevention.

ICD-10-CM A99 is grouped within Diagnostic Related Group(s) (MS-DRG v41.0):

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

Convert A99 to ICD-9-CMCode History

  • 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
  • 2024 (effective 10/1/2023): No change

Diagnosis Index entries containing back-references to A99:

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