**R50 — Fever of other and unknown origin** is the ICD-10 code for elevated body temperature when the cause is not yet identified or when fever does not fit a more specific code.
Sub-codes: R50.0 (fever with chills), R50.2 (drug-induced fever), R50.8 (other specified fever), R50.9 (fever, unspecified).
Belongs to **Chapter R** — Symptoms, signs and abnormal findings.
