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v1.0.0
ICD-10 Guide
ICD-10 CodesB01.12

B01.12

Varicella myelitis

BILLABLE STATUSYes
IMPLEMENTATION DATEOctober 1, 2015
LAST UPDATED09/05/2025

Code Description

ICD-10 B01.12 is a billable code used to indicate a diagnosis of varicella myelitis.

Key Diagnostic Point:

Varicella myelitis is a rare but serious complication of varicella (chickenpox) infection, characterized by inflammation of the spinal cord. This condition typically arises in individuals who have had varicella, particularly in those who are immunocompromised or have not been vaccinated. Symptoms may include severe back pain, weakness in the limbs, sensory disturbances, and in some cases, paralysis. The pathophysiology involves the varicella-zoster virus (VZV) reactivating in the dorsal root ganglia, leading to viral invasion of the spinal cord. Diagnosis is primarily clinical, supported by imaging studies such as MRI, and serological tests to confirm VZV infection. Treatment often involves antiviral medications, corticosteroids to reduce inflammation, and supportive care. Vaccination against varicella is crucial in preventing this complication, as it significantly reduces the incidence of varicella and its associated complications, including myelitis.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Requires understanding of varicella complications
  • Differentiation from other neurological conditions
  • Documentation of vaccination status
  • Need for detailed clinical notes

Audit Risk Factors

  • Inadequate documentation of symptoms
  • Failure to document vaccination history
  • Misdiagnosis with other neurological disorders
  • Lack of supporting imaging or lab results

Specialty Focus

Medical Specialties

Neurology

Documentation Requirements

Detailed neurological examination findings, imaging results, and treatment plans.

Common Clinical Scenarios

Patients presenting with neurological symptoms post-varicella infection.

Billing Considerations

Ensure clear documentation of neurological deficits and their progression.

Infectious Disease

Documentation Requirements

History of varicella infection, vaccination status, and treatment response.

Common Clinical Scenarios

Management of varicella complications in immunocompromised patients.

Billing Considerations

Document any prior varicella infections and vaccination details.

Coding Guidelines

Inclusion Criteria

Use B01.12 When
  • Follow ICD
  • CM guidelines for coding infectious diseases and neurological conditions
  • Ensure accurate documentation of the patient's history, clinical findings, and treatment plans
  • Include any relevant lab results and imaging studies

Exclusion Criteria

Do NOT use B01.12 When
No specific exclusions found.

Related CPT Codes

99223CPT Code

Initial hospital care, typically for a patient with a high level of complexity.

Clinical Scenario

Used when a patient with varicella myelitis is admitted for management.

Documentation Requirements

Comprehensive history and examination, including neurological assessment.

Specialty Considerations

Neurologists should ensure detailed documentation of neurological findings.

ICD-10 Impact

Diagnostic & Documentation Impact

Enhanced Specificity

ICD-10 Improvements

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

Reimbursement & Billing Impact

reimbursement processes.

Resources

Clinical References

  • •
    CDC Varicella Information

Coding & Billing References

  • •
    CDC Varicella Information

Frequently Asked Questions

What are the common symptoms of varicella myelitis?

Common symptoms include severe back pain, weakness in the limbs, sensory disturbances, and in some cases, paralysis.

How is varicella myelitis diagnosed?

Diagnosis is primarily clinical, supported by MRI imaging and serological tests to confirm varicella-zoster virus infection.

What is the role of vaccination in preventing varicella myelitis?

Vaccination against varicella significantly reduces the incidence of varicella and its associated complications, including myelitis.