Other viral hemorrhagic fevers, not elsewhere classified (A98)
ICD-10 code section A98 covers various rare and serious viral hemorrhagic fevers that are not classified elsewhere. These codes identify specific viral infections known for causing severe bleeding disorders.
This section includes diseases such as Crimean-Congo hemorrhagic fever (A98.0), often referred to as a Nairovirus-caused disease or Hazara hemorrhagic fever, and Omsk hemorrhagic fever (A98.1). It also covers Kyasanur Forest disease (A98.2), linked to encephalitis caused by the Kyasanur Forest disease virus. The section further classifies filovirus-related conditions like Marburg virus disease (A98.3) and the more widely known Ebola virus disease (A98.4), which includes variants such as Zaire and Sudan ebolavirus. Additionally, Hemorrhagic fever with renal syndrome (A98.5) is noted, caused by hantaviruses and sometimes called Puumala virus nephropathy. Lastly, code A98.8 is for other specified viral hemorrhagic fevers, including Brazilian hemorrhagic fever and infections caused by the Sabia virus. These ICD-10 codes help healthcare providers accurately document and track these life-threatening viral hemorrhagic conditions.
Certain infectious and parasitic diseases (A00–B99)
Arthropod-borne viral fevers and viral hemorrhagic fevers (A90-A99)
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
Other viral hemorrhagic fevers, not elsewhere classified (A98)
Instructional Notations
Type 1 Excludes
A type 1 excludes note is a pure excludes note. It means "NOT CODED HERE!" An Excludes1 note indicates that the code excluded should never be used at the same time as the code above the Excludes1 note. An Excludes1 is used when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.
Clinical Terms
The following clinical terms provide additional context, helping users better understand the clinical background and common associations for each diagnosis listed in this section. Including related terms alongside ICD-10-CM codes supports coders, billers, and healthcare professionals in improving accuracy, enhancing documentation, and facilitating research or patient education.
Encephalitis Viruses, Tick-Borne
A subgroup of the genus FLAVIVIRUS that causes encephalitis and hemorrhagic fevers and is found in eastern and western Europe and the former Soviet Union. It is transmitted by TICKS and there is an associated milk-borne transmission from viremic cattle, goats, and sheep.
Hemorrhagic Fever with Renal Syndrome
An acute febrile disease occurring predominately in Asia. It is characterized by fever, prostration, vomiting, hemorrhagic phenonema, shock, and renal failure. It is caused by any one of several closely related species of the genus ORTHOHANTAVIRUS. The most severe form is caused by HANTAAN VIRUS whose natural host is the rodent Apodemus agrarius. Milder forms are caused by SEOUL VIRUS and transmitted by the rodents Rattus rattus and R. norvegicus, and the PUUMALA VIRUS with transmission by Clethrionomys galreolus.
Kyasanur Forest Disease
Tick-borne flavivirus infection occurring in the Kyasanur Forest in India.
Marburg Virus Disease
An RNA virus infection of rhesus, vervet, and squirrel monkeys transmissible to man.
RNA
A polynucleotide consisting essentially of chains with a repeating backbone of phosphate and ribose units to which nitrogenous bases are attached. RNA is unique among biological macromolecules in that it can encode genetic information, serve as an abundant structural component of cells, and also possesses catalytic activity. (Rieger et al., Glossary of Genetics: Classical and Molecular, 5th ed)
