ICD-10 Diagnosis Code R50

Fever of other and unknown origin

Diagnosis Code R50

ICD-10: R50
Short Description: Fever of other and unknown origin
Long Description: Fever of other and unknown origin
This is the 2017 version of the ICD-10-CM diagnosis code R50

Code Classification
  • Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified
    • General symptoms and signs (R50-R69)
      • Fever of other and unknown origin (R50)

Information for Medical Professionals

According to ICD-10-CM guidelines this code should not to be used as a principal diagnosis code when a related definitive diagnosis has been established.
Index of Diseases and Injuries
References found for the code R50 in the Index of Diseases and Injuries:

Information for Patients


Also called: Pyrexia

A fever is a body temperature that is higher than normal. It is not an illness. It is part of your body's defense against infection. Most bacteria and viruses that cause infections do well at the body's normal temperature (98.6 F). A slight fever can make it harder for them to survive. Fever also activates your body's immune system.

Infections cause most fevers. There can be many other causes, including

  • Medicines
  • Heat exhaustion
  • Cancers
  • Autoimmune diseases

Treatment depends on the cause of your fever. Your health care provider may recommend using over-the-counter medicines such as acetaminophen or ibuprofen to lower a very high fever. Adults can also take aspirin, but children with fevers should not take aspirin. It is also important to drink enough liquids to prevent dehydration.

  • Familial Mediterranean fever
  • Fever
  • When your baby or infant has a fever

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