Valid for Submission
A99 is a billable diagnosis code used to specify a medical diagnosis of unspecified viral hemorrhagic fever. The code A99 is valid during the fiscal year 2022 from October 01, 2021 through September 30, 2022 for the submission of HIPAA-covered transactions.
The ICD-10-CM code A99 might also be used to specify conditions or terms like viral hemorrhagic fever.
Unspecified diagnosis codes like A99 are acceptable when clinical information is unknown or not available about a particular condition. Although a more specific code is preferable, unspecified codes should be used when such codes most accurately reflect what is known about a patient's condition. Specific diagnosis codes should not be used if not supported by the patient's medical record.
Index to Diseases and Injuries
The Index to Diseases and Injuries is an alphabetical listing of medical terms, with each term mapped to one or more ICD-10 code(s). The following references for the code A99 are found in the index:
The following clinical terms are approximate synonyms or lay terms that might be used to identify the correct diagnosis code:
- Viral hemorrhagic fever
- HEMORRHAGIC FEVERS VIRAL-. 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.
Diagnostic Related Groups - MS-DRG Mapping
Convert A99 to ICD-9 Code
The General Equivalency Mapping (GEM) crosswalk indicates an approximate mapping between the ICD-10 code A99 its ICD-9 equivalent. The approximate mapping means there is not an exact match between the ICD-10 code and the ICD-9 code and the mapped code is not a precise representation of the original code.
Information for Patients
Viral hemorrhagic fevers (VHFs) are a group of illnesses caused by four families of viruses. These include the Ebola and Marburg, Lassa fever, and yellow fever viruses. 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
[Learn More in MedlinePlus]