R50 ICD-10-CM Code: Fever of other and unknown origin
A clear reference for the official code description, hierarchy, and related coding information from the FY 2027 U.S. release.
Code definition
Official description
R50Fever of other and unknown origin
ICD-10-CM diagnosis code · United States clinical modification
Classification
Where R50 sits
- 1
Chapter 18
Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R99)
- 2
Section
General symptoms and signs (R50-R69)
- 3
Category R50
Fever of other and unknown origin
- 4
Code R50
Fever of other and unknown origin
More specific choices
Codes under R50
R50 is a non-billable category. Choose the child code that best matches the documented diagnosis.
Documentation details
Notes for this code
Inclusion terms
No inclusion terms are listed for R50.
Code first
No “code first” instruction is listed for R50.
Use additional code
No “use additional code” instruction is listed for R50.
Excludes1
Conditions that should not be reported together with this code.
- chills without fever (R68.83)
- febrile convulsions (R56.0-)
- fever of unknown origin during labor (O75.2)
- fever of unknown origin in newborn (P81.9)
- hypothermia due to illness (R68.0)
- malignant hyperthermia due to anesthesia (T88.3)
- puerperal pyrexia NOS (O86.4)
Excludes2
Conditions not included here that may be reported separately when present.
No Excludes2 note is listed for R50.
Transparency
Source and release
This reference is generated from Vero’s ICD-10-CM description, hierarchy, and code-note dataset. The visible content and structured data share that source.
Review the CDC/NCHS ICD-10-CM sourceCode-specific guidance
Frequently asked questions
What does ICD-10-CM code R50 mean?
R50 is the FY 2027 U.S. ICD-10-CM code for “Fever of other and unknown origin.”
Is R50 a billable or specific ICD-10-CM code?
No. R50 has more specific child codes in the FY 2027 reference data. Select the code that matches the documentation and confirm the active code set and payer requirements.
Where is R50 located in ICD-10-CM?
R50 is listed in Chapter 18, Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R99), within General symptoms and signs (R50-R69) (R50–R69), under category R50, Fever of other and unknown origin.
What coding notes are listed for R50?
No inclusion terms are listed for R50 in this reference record. No code-first instruction is listed. Excludes1 notes: chills without fever (R68.83); febrile convulsions (R56.0-); fever of unknown origin during labor (O75.2); fever of unknown origin in newborn (P81.9); hypothermia due to illness (R68.0); malignant hyperthermia due to anesthesia (T88.3); puerperal pyrexia NOS (O86.4). No Excludes2 note is listed.
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