Fever of other and unknown origin Excludes1chills 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)