R50.81 – Fever presenting with conditions classified elsewhere

ICD-10-CM 2027 diagnosis code · General symptoms and signs

Billable code

ICD-10-CM code R50.81
Code
R50.81 (claims format: R5081)
Description
Fever presenting with conditions classified elsewhere
Billable
Yes – valid for HIPAA-covered transactions
Valid for
Dates of service October 1, 2026 – September 30, 2027 (FY2027)
Chapter
18. Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R99)
Block
R50-R69 General symptoms and signs
Parent codes
R50 › R50.8

Notes for R50.81

Code first:
  • underlying condition when associated fever is present, such as with:
  • leukemia (C91-C95)
  • neutropenia (D70.-)
  • sickle-cell disease (D57.-)

Notes inherited from parent codes

Instructional notes at a category or block level apply to every code below it.

R50 – Fever of other and unknown origin

Excludes1 (not coded here):
  • 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)

Index terms for R50.81

Entries in the ICD-10-CM alphabetic index that lead to this code:

Related codes in R50.8

Frequently asked questions

What is ICD-10 code R50.81?

R50.81 is the ICD-10-CM code for fever presenting with conditions classified elsewhere, in the block R50-R69 (General symptoms and signs).

Is R50.81 a billable code?

Yes. R50.81 is a billable/specific code that can be used to indicate a diagnosis for reimbursement purposes.

What category does R50.81 belong to?

It belongs to category R50 – Fever of other and unknown origin.

Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.