ICD-10 Diagnosis Code R50.81

Fever presenting with conditions classified elsewhere

Diagnosis Code R50.81

ICD-10: R50.81
Short Description: Fever presenting with conditions classified elsewhere
Long Description: Fever presenting with conditions classified elsewhere
This is the 2017 version of the ICD-10-CM diagnosis code R50.81

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.

Code Edits
The following edits are applicable to this code:
Manifestation diagnoses Additional informationCallout TooltipManifestation diagnoses
Manifestation codes describe the manifestation of an underlying disease, not the disease itself, and therefore should not be used as a principal diagnosis.

Convert to ICD-9 Additional informationCallout TooltipGeneral Equivalence Map
The ICD-10 and ICD-9 GEMs are used to facilitate linking between the diagnosis codes in ICD-9-CM and the new ICD-10-CM code set. The GEMs are the raw material from which providers, health information vendors and payers can derive specific applied mappings to meet their needs.
  • 780.61 - Fever in other diseases

  • Brass-founders' fever
  • Copper fever
  • Copper poisoning
  • Double quotidien fever
  • Endocrine hyperthermia
  • Febrile granulocytopenia
  • Febrile leukopenia
  • Febrile neutropenia
  • Granulocytopenic disorder
  • Intermittent fever
  • Intermittent fever
  • Intermittent hepatic fever
  • Malarial fever
  • Malignant tertian fever
  • Metal fever
  • Metal fever
  • Paraneoplastic fever
  • Pheochromocytoma storm
  • Polymer fume fever
  • Quartan fever
  • Quotidien fever
  • Tertian fever
  • Toxic inhalation-induced febrile illness
  • Toxic inhalation-induced febrile illness
  • Toxic inhalation-induced febrile illness
  • Welders ague

Index of Diseases and Injuries
References found for the code R50.81 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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