-
ICD-10-CM Codes
›
-
R00-R99
Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified
›
-
R50-R69
General symptoms and signs
›
-
R50-
Fever of other and unknown origin
›
-
2021 ICD-10-CM Diagnosis Code R50.9
2021 ICD-10-CM Diagnosis Code R50.9
Fever, unspecified
2016 2017 2018 2019 2020 2021 Billable/Specific Code
- R50.9 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
- The 2021 edition of ICD-10-CM R50.9 became effective on October 1, 2020.
- This is the American ICD-10-CM version of R50.9 - other international versions of ICD-10 R50.9 may differ.
Applicable To- Fever NOS
- Fever of unknown origin [FUO]
- Fever with chills
- Fever with rigors
- Hyperpyrexia NOS
- Persistent fever
- Pyrexia NOS
The following code(s) above
R50.9 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
R50.9:
Approximate Synonyms
- Febrile illness (fever)
- Fever
- Fever of unknown origin
- Fever with chills
- Pyrexia of unknown origin
Clinical Information
- A disorder characterized by elevation of the body's temperature above the upper limit of normal.
- 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.
- A rise in body temperature above the normal, often as a response to infection. [goc:jl]
- Abnormal elevation of body temperature, usually as a result of a pathologic process.
- An abnormal elevation of body temperature, usually as a result of a pathologic process.
- An increase in body temperature above normal (98.6 degrees f), usually caused by disease.
- Fever in which the etiology cannot be ascertained.
- Fever: a documented body temperature higher than 38 degrees c., or 100.4 degrees f.
- The elevation of the body's temperature above the upper limit of normal, usually taken as 37.7 degrees c.
ICD-10-CM R50.9 is grouped within Diagnostic Related Group(s) (MS-DRG v38.0):
- 864 Fever and inflammatory conditions
Convert R50.9 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
- 2021 (effective 10/1/2020): No change
Code annotations containing back-references to R50.9:
- Chill(s) R68.83
ICD-10-CM Diagnosis Code R68.83
Chills (without fever)
2016 2017 2018 2019 2020 2021 Billable/Specific Code
Type 1 Excludes- chills with fever (R50.9)
- Elevated, elevation
- body temperature R50.9 (of unknown origin)
- Fever (inanition) (of unknown origin) (persistent) (with chills) (with rigor) R50.9
- intermittent (bilious) - see also Malaria
- ephemeral R50.9 (of unknown origin)
- persistent R50.9 (of unknown origin)
- unknown origin R50.9
- FUO R50.9 (fever of unknown origin)
- High
- temperature R50.9 (of unknown origin)
- Hyperpyrexia R50.9
- Inanition R64
ICD-10-CM Diagnosis Code R64
Cachexia
2016 2017 2018 2019 2020 2021 Billable/Specific Code
Code First- underlying condition, if known
Type 1 Excludes- abnormal weight loss (R63.4)
- nutritional marasmus (E41)
- PUO R50.9 (pyrexia of unknown origin)
- Pyrexia (of unknown origin) R50.9
- Rigors R68.89
ICD-10-CM Diagnosis Code R68.89
Other general symptoms and signs
2016 2017 2018 2019 2020 2021 Billable/Specific Code
- Temperature
- body, high R50.9 (of unknown origin)
ICD-10-CM Codes Adjacent To R50.9
R49.8 Other voice and resonance disorders
R49.9 Unspecified voice and resonance disorder
R50 Fever of other and unknown origin
R50.8 Other specified fever
R50.81 Fever presenting with conditions classified elsewhere
R50.84 Febrile nonhemolytic transfusion reaction
R50.9
Fever, unspecified
R51.0 Headache with orthostatic component, not elsewhere classified
R51.9 Headache, unspecified
R53.0 Neoplastic (malignant) related fatigue
R53.2 Functional quadriplegia
R53.8 Other malaise and fatigue
Reimbursement claims with a date of service on or after October 1, 2015 require the use of ICD-10-CM codes.