R50 Fever of other and unknown origin

Non-billable header with 3 child codes.

Excludes1 (never code together)

• 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)

Applies from R50 Fever of other and unknown origin

Excludes1 (never code together)

• 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)

Codes under R50

• R50.2 Drug induced fever
• R50.8 Other specified fever
• R50.9 Fever, unspecified

Nearby codes

• R50 Fever of other and unknown origin (this code)
• R50.2 Drug induced fever
• R50.8 Other specified fever
• R50.81 Fever presenting with conditions classified elsewhere
• R50.82 Postprocedural fever
• R50.83 Postvaccination fever