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R50.9 Fever, unspecified
BackR50Fever of other and unknown originCategory3 →R50.2Drug induced feverCategoryR50.8Other specified feverCategory4 →R50.81Fever presenting with conditions classified elsewhereCategoryR50.82Postprocedural feverCategoryR50.83Postvaccination feverCategoryR50.84Febrile nonhemolytic transfusion reactionCategoryR50.9Fever, unspecifiedCategory
CategoryCODABLE
R50.9
Fever, unspecified
EXAMPLES
Fever NOS
Fever of unknown origin [FUO]
Fever with chills
Fever with rigors
Hyperpyrexia NOS
Persistent fever
Pyrexia NOS
Fever of unknown origin [FUO]
Fever with chills
Fever with rigors
Hyperpyrexia NOS
Persistent fever
Pyrexia NOS
- Chapter
- XVIII · Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified
- Section
- R50-R69
- Valid from
Source
CMS ICD-10-CM Tabular List, edition FY2026.