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ICD-10 Guide
ICD-10 CodesR50.2

R50.2

Drug induced fever

BILLABLE STATUSYes
IMPLEMENTATION DATEOctober 1, 2015
LAST UPDATED09/11/2025

Code Description

ICD-10 R50.2 is a billable code used to indicate a diagnosis of drug induced fever.

Key Diagnostic Point:

Drug induced fever (R50.2) refers to an elevation in body temperature resulting from the administration of medications. This condition can manifest as a mild to moderate fever, typically defined as a body temperature exceeding 100.4°F (38°C). The fever may arise from various pharmacological agents, including antibiotics, anticonvulsants, and non-steroidal anti-inflammatory drugs (NSAIDs). The pathophysiology often involves drug-induced hypersensitivity reactions, direct effects on the hypothalamic thermoregulatory center, or the release of pyrogens. Clinically, patients may present with additional symptoms such as chills, sweating, and malaise. Laboratory findings may include leukocytosis or elevated inflammatory markers, although these are not specific to drug-induced fever. Accurate identification of the offending agent is crucial, as discontinuation of the drug typically leads to resolution of the fever. Careful documentation of the patient's medication history and the timeline of fever onset in relation to drug administration is essential for proper coding and management.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Variety of drugs that can cause fever
  • Need for thorough patient medication history
  • Differentiation from other fever causes
  • Potential for misdiagnosis

Audit Risk Factors

  • Inadequate documentation of drug history
  • Failure to link fever to specific medications
  • Misclassification of fever type
  • Lack of follow-up documentation post-drug discontinuation

Specialty Focus

Medical Specialties

Internal Medicine

Documentation Requirements

Complete medication list, onset and duration of fever, and any associated symptoms.

Common Clinical Scenarios

Patients presenting with fever after starting new medications, particularly antibiotics or anticonvulsants.

Billing Considerations

Consider potential drug interactions and the patient's overall clinical picture.

Emergency Medicine

Documentation Requirements

Immediate assessment of vital signs, medication history, and any acute symptoms.

Common Clinical Scenarios

Patients with acute fever in the emergency department, especially those with recent medication changes.

Billing Considerations

Rapid identification of drug-induced fever is critical to prevent unnecessary treatments.

Coding Guidelines

Inclusion Criteria

Use R50.2 When
  • Follow official ICD
  • 10 guidelines for coding symptoms and signs
  • Ensure that the diagnosis is supported by clinical documentation linking the fever to specific drug use

Exclusion Criteria

Do NOT use R50.2 When
No specific exclusions found.

Related CPT Codes

99213CPT Code

Established patient office visit, Level 3

Clinical Scenario

When a patient presents with fever and a medication history review is performed.

Documentation Requirements

Document the visit details, including history, examination, and medical decision-making.

Specialty Considerations

Internal medicine may require more detailed medication reconciliation.

ICD-10 Impact

Diagnostic & Documentation Impact

Enhanced Specificity

ICD-10 Improvements

The transition to ICD-10 has allowed for more specific coding of drug-induced conditions, improving the accuracy of patient records and treatment plans.

ICD-9 vs ICD-10

The transition to ICD-10 has allowed for more specific coding of drug-induced conditions, improving the accuracy of patient records and treatment plans.

Reimbursement & Billing Impact

The transition to ICD-10 has allowed for more specific coding of drug-induced conditions, improving the accuracy of patient records and treatment plans.

Resources

Clinical References

  • •
    ICD-10-CM Official Guidelines for Coding and Reporting

Coding & Billing References

  • •
    ICD-10-CM Official Guidelines for Coding and Reporting

Frequently Asked Questions

What should be documented to support the use of R50.2?

Document the specific medications taken, the timeline of fever onset, any associated symptoms, and the clinical decision-making process leading to the diagnosis.