Fever of other and unknown origin
Notes: Postimmunization fever ; FNHTR ; Posttransfusion fever ; Fever NOS ; Fever of unknown origin [FUO] ; Fever with chills ; Fever with rigors ; Hyperpyrexia NOS ; Persistent fever ; Pyrexia NOS ; code for adverse effect, if applicable, to identify drug (T36-T50 with fifth or sixth character 5) ; 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) ; postvaccination (postimmunization) fever (R50.83) ; postprocedural infection (T81.4-) ; posttransfusion fever (R50.84) ; postvaccination (postimmunization) fever (R50.83) ; underlying condition when associated fever is present, such as with: ; leukemia (C91-C95) ; neutropenia (D70.-) ; sickle-cell disease (D57.-)