Current
R50 — Fever of other and unknown origin
Part of Chapter 18: Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified , block General symptoms and signs (R50-R69) .
Official Notes
Excludes1
chills without fever ( R68.83 )
Excludes1
febrile convulsions ( R56.0- )
Excludes1
fever of unknown origin during labor ( O75.2 )
Excludes1
fever of unknown origin in newborn ( P81.9 )
Excludes1
hypothermia due to illness ( R68.0 )
Excludes1
malignant hyperthermia due to anesthesia ( T88.3 )
Excludes1
puerperal pyrexia NOS ( O86.4 )
Child Codes
FY 2027 effective October 1, 2026 · CDC NCHS and CMS