All ICD10 Codes

R50

Non-Billable
ChapterR00–R99
Rankcategory
Official Description

Fever of other and unknown origin

Use a more specific code (2 billable, 1 non-billable)
R50.2Drug induced feverR50.8Other specified feverhas subcodesR50.9Fever, unspecified
Metadata & Insights
  • •Non-billable category (requires more specific sub-code).
  • •Chapter 18: Symptoms, Signs and Abnormal Clinical and Laboratory Findings (R00-R99).

CH18 Parent Instructions

Excludes2(Not included here. Code separately if applicable.)
  • abnormal findings on antenatal screening of mother (O28.-)
  • certain conditions originating in the perinatal period (P04-P96)
  • signs and symptoms classified in the body system chapters
  • signs and symptoms of breast (N63, N64.5)

Instructional Notes

Excludes1(Not coded here. Use a different code.)
  • 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)

Clinical Hierarchy

BillableHas subcodes
CH18Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R99)
R50-R69General symptoms and signs (R50-R69)
R50Fever of other and unknown originNot billable
R50.2Drug induced feverBillable
R50.8Other specified feverSubcodes
R50.9Fever, unspecifiedBillable

Applicable Ancestor Context

The following parent sections contain instructions or notes that apply to R50:

chapterCH18
Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R99)
View context instructions

MS-DRG Classification

2026

No direct MS-DRG triggers identified.

Cross Reference

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