Preferred Label : Fever of other and unknown origin;
ICD-10 exclusion note : fever of unknown origin in newborn (P81.9); chills without fever (R68.83); fever of unknown origin during labor (O75.2); malignant hyperthermia due to anesthesia (T88.3); hypothermia due to illness (R68.0); febrile convulsions (R56.0-); puerperal pyrexia NOS (O86.4);