R50
⚠ Non-billable
Fever of other and unknown origin
ICD-10-CM · FY2026 · Symptoms, Signs and Abnormal Clinical and Laboratory Findings
Code
R50
System
ICD-10-CM
Billable
No — use specific code
Effective
FY2026
Chapter
Symptoms, Signs and Abnormal Clinical and Laboratory Findings
Source
CMS / CDC NCHS
⚠ Verify before billing. Confirm against the current CMS/NCHS ICD-10-CM files and your payer's rules before claims submission.
Frequently asked questions
What is ICD-10 code R50?
ICD-10-CM code R50 represents Fever of other and unknown origin. It is a non-billable header code requiring a more specific subcategory in the Symptoms, Signs and Abnormal Clinical and Laboratory Findings chapter, effective October 1, 2025 – September 30, 2026.
Is R50 billable?
No. R50 is a non-billable header. Select a more specific subcategory for claims submission.
What chapter is R50 in?
R50 belongs to the Symptoms, Signs and Abnormal Clinical and Laboratory Findings chapter (R00–R99) of ICD-10-CM.
Related codes in the R50 category
R50.2
Drug induced fever
Billable
R50.8
Other specified fever
Non-billable
R50.9
Fever, unspecified
Billable
R50.81
Fever presenting with conditions classified elsewhere
Billable
R50.82
Postprocedural fever
Billable
R50.83
Postvaccination fever
Billable
R50.84
Febrile nonhemolytic transfusion reaction
Billable
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