2020 ICD-10-CM Diagnosis Code A99

Unspecified viral hemorrhagic fever

    2016 2017 2018 2019 2020 Billable/Specific Code
  • A99 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
  • The 2020 edition of ICD-10-CM A99 became effective on October 1, 2019.
  • 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
Annotation Back-References
In this context, annotation back-references refer to codes that contain:
  • Applicable To annotations, or
  • Code Also annotations, or
  • Code First annotations, or
  • Excludes1 annotations, or
  • Excludes2 annotations, or
  • Includes annotations, or
  • Note annotations, or
  • Use Additional annotations
that may be applicable to A99:
  • A00-B99
    2020 ICD-10-CM Range A00-B99

    Certain infectious and parasitic diseases

    Includes
    • diseases generally recognized as communicable or transmissible
    Type 1 Excludes
    • certain localized infections - see body system-related chapters
    Type 2 Excludes
    • carrier or suspected carrier of infectious disease (Z22.-)
    • infectious and parasitic diseases complicating pregnancy, childbirth and the puerperium (O98.-)
    • infectious and parasitic diseases specific to the perinatal period (P35-P39)
    • influenza and other acute respiratory infections (J00-J22)
    Use Additional
    • code to identify resistance to antimicrobial drugs (Z16.-)
    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 v37.0):
  • 865 Viral illness with mcc
  • 866 Viral illness without mcc

Convert A99 to ICD-9-CM

Code 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

Diagnosis Index entries containing back-references to A99:
  • 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 Billable/Specific Code
    Applicable To
    • Fever NOS
    • Fever of unknown origin [FUO]
    • Fever with chills
    • Fever with rigors
    • Hyperpyrexia NOS
    • Persistent fever
    • Pyrexia NOS
    • hemorrhagic (arthropod-borne) A94
      ICD-10-CM Diagnosis Code A94

      Unspecified arthropod-borne viral fever

        2016 2017 2018 2019 2020 Billable/Specific Code
      Applicable To
      • Arboviral fever NOS
      • Arbovirus infection NOS

ICD-10-CM Codes Adjacent To A99
A96.8 Other arenaviral hemorrhagic fevers
A96.9 Arenaviral hemorrhagic fever, unspecified
A98 Other viral hemorrhagic fevers, not elsewhere classified
A98.0 Crimean-Congo hemorrhagic fever
A98.1 Omsk hemorrhagic fever
A98.2 Kyasanur Forest disease
A98.3 Marburg virus disease
A98.4 Ebola virus disease
A98.5 Hemorrhagic fever with renal syndrome
A98.8 Other specified viral hemorrhagic fevers
A99 Unspecified viral hemorrhagic fever
B00 Herpesviral [herpes simplex] infections
B00.0 Eczema herpeticum
B00.1 Herpesviral vesicular dermatitis
B00.2 Herpesviral gingivostomatitis and pharyngotonsillitis
B00.3 Herpesviral meningitis
B00.4 Herpesviral encephalitis
B00.5 Herpesviral ocular disease
B00.50 …… unspecified
B00.51 Herpesviral iridocyclitis
B00.52 Herpesviral keratitis

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