ICD-10-CM Current in FY 2027

R50.81

Fever presenting with conditions classified elsewhere

Release: FY 2027
Effective: October 1, 2026

Official source

Hierarchy

Where R50.81 sits in the official hierarchy. Each level is the code it is classified under.

R50 Fever of other and unknown origin
R50.8 Parent Other specified fever
R50.81 This code Fever presenting with conditions classified elsewhere

Official Coding Notes

Reproduced verbatim from the FY 2027 ICD-10-CM files. Notes labelled as inherited are declared on a parent code and apply here too.

Excludes1

chills without fever ( R68.83 )

Inherited from R50 — Fever of other and unknown origin

Excludes1

febrile convulsions ( R56.0- )

Inherited from R50 — Fever of other and unknown origin

Excludes1

fever of unknown origin during labor ( O75.2 )

Inherited from R50 — Fever of other and unknown origin

Excludes1

fever of unknown origin in newborn ( P81.9 )

Inherited from R50 — Fever of other and unknown origin

Excludes1

hypothermia due to illness ( R68.0 )

Inherited from R50 — Fever of other and unknown origin

Excludes1

malignant hyperthermia due to anesthesia ( T88.3 )

Inherited from R50 — Fever of other and unknown origin

Excludes1

puerperal pyrexia NOS ( O86.4 )

Inherited from R50 — Fever of other and unknown origin

Code First

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

Code First

leukemia (C91-C95)

Code First

neutropenia ( D70 .-)

Code First

sickle-cell disease ( D57 .-)

Version History

How R50.81 appears in each release imported from the official files, newest first.

FY 2027 Effective October 1, 2026
Current

Fever presenting with conditions classified elsewhere
FY 2026 Effective October 1, 2025
Unchanged

Fever presenting with conditions classified elsewhere

Other codes under R50.8

Codes whose official notes reference R50.81

Data Source

Code information on this page is derived from the FY 2027 ICD-10-CM files published by CDC NCHS and CMS.

Release: FY 2027
Effective: October 1, 2026
Source file: icd10cm-code-descriptions-2027.zip

Official ICD-10-CM source files (opens in a new tab)

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