Alphabetic Index · main term
FUO (fever of unknown origin)
FUO (fever of unknown origin) is a main term in the FY2027 ICD-10-CM Alphabetic Index (Index to Diseases and Injuries). The Index lists R50.9 for this term: Fever, unspecified. It is a billable code. Confirm any code you find here in the Tabular List before you report it.
Code the Index gives
Fever, unspecified
Other Index terms that lead to R50.9
Different words, same code. 16 entries
- Chill (s), with fever
- Elevated, elevation, body temperature (of unknown origin)
- Fever (inanition) (of unknown origin) (persistent) (with chills) (with rigor)
- Fever (inanition) (of unknown origin) (persistent) (with chills) (with rigor), ephemeral (of unknown origin)
- Fever (inanition) (of unknown origin) (persistent) (with chills) (with rigor), intermittent (bilious), of unknown origin
- Fever (inanition) (of unknown origin) (persistent) (with chills) (with rigor), persistent (of unknown origin)
- Fever (inanition) (of unknown origin) (persistent) (with chills) (with rigor), unknown origin
- High, temperature (of unknown origin)
- Hyperpyrexia
- Hyperpyrexia, unknown origin
- Inanition, fever
- PUO (pyrexia of unknown origin)