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ICD-10 Guide
ICD-10 CodesR56.01

R56.01

Complex febrile convulsions

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

Code Description

ICD-10 R56.01 is a billable code used to indicate a diagnosis of complex febrile convulsions.

Key Diagnostic Point:

Complex febrile convulsions are seizures that occur in children, typically between the ages of 6 months and 5 years, in the context of fever. Unlike simple febrile convulsions, which are brief and generalized, complex febrile convulsions last longer than 15 minutes, may be focal, and can recur within a 24-hour period. Symptoms may include loss of consciousness, jerking movements, and postictal confusion. These convulsions can be alarming for caregivers and may require immediate medical evaluation to rule out underlying conditions such as meningitis or intracranial hemorrhage. Laboratory findings may include elevated white blood cell counts if an infection is present, and imaging studies may be warranted to assess for structural abnormalities. Accurate diagnosis and management are crucial to prevent complications and ensure appropriate follow-up care.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Differentiating between simple and complex febrile convulsions
  • Identifying underlying causes of fever
  • Documenting the duration and characteristics of the convulsion
  • Understanding the need for additional diagnostic tests

Audit Risk Factors

  • Inadequate documentation of seizure duration and characteristics
  • Failure to document fever and its duration
  • Misclassification of simple vs. complex febrile convulsions
  • Lack of follow-up documentation for recurrent seizures

Specialty Focus

Medical Specialties

Internal Medicine

Documentation Requirements

Detailed history of fever, seizure characteristics, and any neurological examination findings.

Common Clinical Scenarios

Children presenting with fever and seizures in a primary care setting.

Billing Considerations

Consideration of other potential causes of fever and seizures, such as infections or metabolic disturbances.

Emergency Medicine

Documentation Requirements

Acute care documentation including vital signs, seizure duration, and immediate interventions.

Common Clinical Scenarios

Children brought to the emergency department with seizures and fever.

Billing Considerations

Rapid assessment for serious underlying conditions such as meningitis or encephalitis.

Coding Guidelines

Inclusion Criteria

Use R56.01 When
  • 10 coding guidelines specify that complex febrile convulsions should be coded when the seizure is prolonged, focal, or recurrent within 24 hours
  • Documentation must support the complexity of the convulsion

Exclusion Criteria

Do NOT use R56.01 When
No specific exclusions found.

Related CPT Codes

99284CPT Code

Emergency department visit, high severity

Clinical Scenario

Used when a child presents with complex febrile convulsions requiring emergency evaluation.

Documentation Requirements

Document the severity of the condition, interventions performed, and patient response.

Specialty Considerations

Emergency medicine providers should ensure thorough documentation of the acute presentation.

ICD-10 Impact

Diagnostic & Documentation Impact

Enhanced Specificity

ICD-10 Improvements

The transition to ICD-10 has allowed for more specific coding of complex febrile convulsions, improving the accuracy of data collection and reimbursement processes.

ICD-9 vs ICD-10

The transition to ICD-10 has allowed for more specific coding of complex febrile convulsions, improving the accuracy of data collection and reimbursement processes.

Reimbursement & Billing Impact

reimbursement processes.

Resources

Clinical References

  • •
    American Academy of Pediatrics Guidelines

Coding & Billing References

  • •
    American Academy of Pediatrics Guidelines

Frequently Asked Questions

What differentiates complex febrile convulsions from simple ones?

Complex febrile convulsions last longer than 15 minutes, may be focal, and can recur within 24 hours, whereas simple febrile convulsions are brief and generalized.