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ICD-10-CM-2023 Diagnosis Codes Overview
ICD-10-CM-2023 > R00-R99 > R50-R69 > R50
R50-R69
General symptoms and signs
R50

Fever of other and unknown origin

Excl1.:
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)
R50.2
Drug induced fever
Use add'l
code for adverse effect, if applicable, to identify drug (T36-T50 with fifth or sixth character 5)
Excl1.:
postvaccination (postimmunization) fever (R50.83)
R50.8

Other specified fever

R50.81
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.-)
R50.82
Postprocedural fever
Excl1.:
postprocedural infection (T81.4-)
posttransfusion fever (R50.84)
postvaccination (postimmunization) fever (R50.83)
R50.83
Postvaccination fever
Info:
Postimmunization fever
R50.84
Febrile nonhemolytic transfusion reaction
Info:
FNHTR
Posttransfusion fever
R50.9
Fever, unspecified
Info:
Fever NOS
Fever of unknown origin [FUO]
Fever with chills
Fever with rigors
Hyperpyrexia NOS
Persistent fever
Pyrexia NOS

 

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