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Code
Description

ICD-10-CM Code R50.9
Fever, unspecified

BILLABLE
Billable Code
Billable codes are sufficient justification for admission to an acute care hospital when used a principal diagnosis.
| ICD-10 from 2011 - 2016

R50.9 is a billable ICD code used to specify a diagnosis of fever, unspecified. A 'billable code' is detailed enough to be used to specify a medical diagnosis.


The ICD code R50 is used to code Fever

Fever, also known as pyrexia and febrile response, is defined as having a temperature above the normal range due to an increase in the body's temperature set-point. There is not a single agreed-upon upper limit for normal temperature with sources using values between 37.5 and 38.3 °C (99.5 and 100.9 °F). The increase in set-point triggers increased muscle contraction and causes a feeling of cold. This results in greater heat production and efforts to conserve heat. When the set-point temperature returns to normal a person feels hot, becomes flushed, and may begin to sweat. Rarely a fever may trigger a febrile seizure. This is more common in young children. Fevers do not typically go higher than 41 to 42 °C (105.8 to 107.6 °F).

Specialty: Infectious Disease, Pediatrics
MeSH Code: D005334
ICD 9 Code: 780.6

An analog medical thermometer showing a temperature of 7002311950000000000♠38.8 °C or 7002311927777777777♠101.8 °F

Coding Notes for R50.9 Info for medical coders on how to properly use this ICD-10 code

Inclusion Terms:
Inclusion Terms
Inclusion Terms are a list of concepts for which a specific code is used. The list of Inclusion Terms is useful for determining the correct code in some cases, but the list is not necessarily exhaustive.
Fever NOS
Fever of unknown origin [FUO]
Fever with chills
Fever with rigors
Hyperpyrexia NOS
Persistent fever
Pyrexia NOS

MS-DRG Mapping

  • DRG Group #864 - Fever.

Related Concepts SNOMET-CT

  • On examination - fever - intermittent (finding)
  • On examination - fever-gradual fall-lysis (finding)
  • Rapid fall of fever (finding)
  • Reversed diurnal fever (finding)

Coding Advice SNOMET-CT

  • Possible requirement for additional code to fully describe disease or condition
  • Possible requirement for an external cause code

ICD-10-CM Alphabetical Index References for 'R50.9 - Fever, unspecified'

The ICD-10-CM Alphabetical Index links the below-listed medical terms to the ICD code R50.9. Click on any term below to browse the alphabetical index.

PUO(pyrexia of unknown origin) (R50.9)
Pyrexia(of unknown origin) (R50.9)
Hyperpyrexia (R50.9)
Fever(inanition) (of unknown origin) (persistent) (with chills) (with rigor) (R50.9)
FUO(fever of unknown origin) (R50.9)
Fever(inanition) (of unknown origin) (persistent) (with chills) (with rigor) (R50.9) +

Equivalent ICD-9 Code GENERAL EQUIVALENCE MAPPINGS (GEM)

Fever, unspecified (approximate match)

This is the official approximate match mapping between ICD9 and ICD10, as provided by the General Equivalency mapping crosswalk. This means that while there is no exact mapping between this ICD10 code R50.9 and a single ICD9 code, 780.60 is an approximate match for comparison and conversion purposes.


Parent Code: R50 - Fever of other and unknown origin

** This Document Provided By ICD.Codes **
Source: http://icd.codes/icd10cm/R509