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v1.0.0
ICD-10 Guide
ICD-10 CodesA39.1

A39.1

Meningococcal meningitis, unspecified

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

Code Description

ICD-10 A39.1 is a billable code used to indicate a diagnosis of meningococcal meningitis, unspecified.

Key Diagnostic Point:

Meningococcal meningitis is a serious bacterial infection of the protective membranes covering the brain and spinal cord, caused by Neisseria meningitidis. This condition can lead to severe complications, including neurological damage, septicemia, and death if not treated promptly. Symptoms typically include sudden onset of fever, headache, stiff neck, nausea, vomiting, increased sensitivity to light, and altered mental status. The unspecified designation indicates that the specific serogroup of Neisseria meningitidis is not identified, which can complicate treatment and epidemiological tracking. Diagnosis is primarily through clinical evaluation and confirmation via lumbar puncture and cerebrospinal fluid analysis. Treatment usually involves intravenous antibiotics, such as ceftriaxone or penicillin, and may require adjunctive therapies like corticosteroids to reduce inflammation. Vaccination is a key preventive measure, particularly in high-risk populations.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Unspecified nature of the code can lead to ambiguity in documentation.
  • Differentiating between types of meningitis (viral vs. bacterial) is crucial.
  • Potential for misclassification with other types of meningitis.
  • Need for precise documentation of symptoms and treatment response.

Audit Risk Factors

  • Inadequate documentation of clinical findings.
  • Failure to specify the type of meningitis.
  • Lack of supporting lab results in the medical record.
  • Inconsistent coding practices among providers.

Specialty Focus

Medical Specialties

Infectious Disease

Documentation Requirements

Detailed clinical notes on symptoms, lab results, and treatment plans.

Common Clinical Scenarios

Diagnosis and management of meningitis outbreaks, treatment of individual cases.

Billing Considerations

Need for clear documentation of serogroup if known, and rationale for treatment choices.

Neurology

Documentation Requirements

Comprehensive neurological assessments and follow-up notes.

Common Clinical Scenarios

Evaluation of neurological deficits post-meningitis treatment.

Billing Considerations

Documentation of neurological status changes and any sequelae.

Coding Guidelines

Inclusion Criteria

Use A39.1 When
  • Follow ICD
  • CM guidelines for coding infectious diseases, ensuring specificity in documentation
  • 1 should be used when the meningococcal infection is confirmed but the serogroup is not specified

Exclusion Criteria

Do NOT use A39.1 When
  • Exclude codes for viral meningitis or other bacterial meningitis types

Related CPT Codes

62270CPT Code

Lumbar puncture

Clinical Scenario

Used to obtain CSF for analysis in suspected meningitis cases.

Documentation Requirements

Document indication for procedure, findings, and any complications.

Specialty Considerations

Neurology and Infectious Disease specialists should ensure thorough documentation of clinical rationale.

ICD-10 Impact

Diagnostic & Documentation Impact

Enhanced Specificity

ICD-10 Improvements

The transition to ICD-10 has allowed for greater specificity in coding infectious diseases, including meningococcal meningitis. A39.1 provides a clear designation for unspecified cases, which aids in tracking epidemiological trends and treatment outcomes.

ICD-9 vs ICD-10

The transition to ICD-10 has allowed for greater specificity in coding infectious diseases, including meningococcal meningitis. A39.1 provides a clear designation for unspecified cases, which aids in tracking epidemiological trends and treatment outcomes.

Reimbursement & Billing Impact

The transition to ICD-10 has allowed for greater specificity in coding infectious diseases, including meningococcal meningitis. A39.1 provides a clear designation for unspecified cases, which aids in tracking epidemiological trends and treatment outcomes.

Resources

Clinical References

  • •
    CDC Meningococcal Disease Information

Coding & Billing References

  • •
    CDC Meningococcal Disease Information

Frequently Asked Questions

What is the difference between A39.1 and A39.0?

A39.1 is used when the specific serogroup of Neisseria meningitidis is not identified, while A39.0 is used when the infection is specifically due to serogroup A.