ICD-10-CM Book 2025 Edition

Chapters ICD-10-CM Book Table of Content /
chapter 18 R00-R99 Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified /
R50-R69 General symptoms and signs /
R50 Fever of other and unknown origin

  Billable ICD-10-CM Code R50.81
R50.81
Fever presenting with conditions classified elsewhere
codeFirst
underlying condition when associated fever is present, such as with:
leukemia (C91-C95)
neutropenia (D70.-)
sickle-cell disease (D57.-)
nonPrimary
Yes