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Home/Diagnosis/ICD-10 Coding for Fever Unspecified (R50.9)

ICD-10 Coding for Fever Unspecified (R50.9)

R50.9

Complete ICD-10-CM coding and documentation guide for icd-10 coding for fever unspecified (r50.9) includes clinical validation requirements, medical necessity guidelines, and coding policies.

Also Known as:
Fever of Unknown Origin
FUO
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Key Information: ICD-10 Coding for Fever Unspecified (R50.9)

Essential facts and insights about ICD-10 Coding for Fever Unspecified (R50.9)

Use ICD-10 code R50.9 for fever, unspecified, ensuring proper documentation in clinical notes.

Primary ICD-10-CM Codes

Fever, unspecified

Billable Code
R50.9
Billable

Diagnostic Criteria

clinical:
  • • Fever persists with no identifiable cause after initial tests
coding:
  • • No specific diagnosis or condition is identified as the cause of fever
documentation:
  • • Provider notes indicate 'fever of unknown origin' or similar phrasing

Applicable To

  • • Fever NOS
  • • Fever of unknown origin (FUO)

Important Notes

  • • Ensure documentation clearly states that the fever's cause is unknown after evaluation.
Ancillary Codes

Additional codes that may be used with this diagnosis

T81.89

Other complications of procedures

Use with R50.82 for postprocedural fever.

Frequently Asked Questions

What is the ICD-10 code for fever unspecified?

The ICD-10 code for fever unspecified is R50.9, used when the cause of fever is not determined after initial evaluation.

When should R50.9 be used?

Use R50.9 when a patient presents with fever and no specific cause is identified after a thorough workup.

Can R50.9 be used with COVID-19?

No, if COVID-19 is confirmed, use U07.1 instead of R50.9. For suspected cases, use Z20.822.

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