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Home/Diagnosis/ICD-10 Coding for Fever

ICD-10 Coding for Fever

R50.9
R50.81

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

Also Known as:
Pyrexia
Febrile response
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Key Information: ICD-10 Coding for Fever

Essential facts and insights about ICD-10 Coding for Fever

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 without identified source after tests
coding:
  • • No other specific fever code applies

Applicable To

  • • Pyrexia NOS

Important Notes

  • • Ensure no specific cause is documented before using R50.9.

Fever presenting with conditions classified elsewhere

Billable Code
R50.81
Billable

Diagnostic Criteria

clinical:
  • • Documented causal relationship with another condition

Applicable To

  • • Fever due to known condition

Important Notes

  • • Always sequence the underlying condition first.
Ancillary Codes

Additional codes that may be used with this diagnosis

R50.2

Drug-induced fever

Use when fever is due to a drug reaction.

Frequently Asked Questions

What is the ICD-10 code for unspecified fever?

The ICD-10 code for unspecified fever is R50.9, used when the cause of fever is not identified.

When should R50.81 be used?

R50.81 should be used when fever is secondary to a known condition, with the underlying condition coded first.

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