Fever of other and unknown origin

**Excludes1:** - 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)