R50.9

Billable

Fever, unspecified

R50.9 is the ICD-10-CM code for Fever, unspecified. It is a billable, specific code valid for reimbursement.

Status
Billable
Chapter
R00-R99
Parent
R50
Edition
FY2026

R00-R99 Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified

Includes

  • Fever NOS
  • Fever of unknown origin [FUO]
  • Fever with chills
  • Fever with rigors
  • Hyperpyrexia NOS
  • Persistent fever
  • Pyrexia NOS

Frequently asked questions

What is ICD-10 code R50.9?
R50.9 is the ICD-10-CM code for "Fever, unspecified". It falls under R00-R99 Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified.
Is R50.9 a billable code?
Yes — R50.9 is a billable, specific ICD-10-CM code valid for reimbursement.

Source: CMS ICD-10-CM FY2026. For informational purposes only — not medical advice. See our medical disclaimer.

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