R50 - Fever of other and unknown origin

Category: R50 - Fever of other and unknown origin

Fever of other and unknown origin

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)

Drug induced fever

Use additional code for adverse effect, if applicable, to identify drug (T36-T50 with fifth or sixth character 5)

postvaccination (postimmunization) fever (R50.83)

Other specified fever

Fever presenting with conditions classified elsewhere

Code first underlying condition when associated fever is present, such as with:

leukemia (C91-C95)

neutropenia (D70.-)

sickle-cell disease (D57.-)

Postprocedural fever

postprocedural infection (T81.4-)

posttransfusion fever (R50.84)

postvaccination (postimmunization) fever (R50.83)

Postvaccination fever

Postimmunization fever

Febrile nonhemolytic transfusion reaction

FNHTR

Posttransfusion fever

Fever, unspecified

Fever NOS

Fever of unknown origin [FUO]

Fever with chills

Fever with rigors

Hyperpyrexia NOS

Persistent fever

Pyrexia NOS