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ICD-10 Guide
ICD-10 CodesChapter 6: Diseases of the nervous systemG09

G09

Billable

Sequelae of inflammatory diseases of central nervous system

Chapter 6:Diseases of the nervous system

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

Code Description

ICD-10 G09 is a billable code used to indicate a diagnosis of sequelae of inflammatory diseases of central nervous system.

Key Diagnostic Point:

G09 is used to classify sequelae resulting from inflammatory diseases of the central nervous system (CNS), including infections such as meningitis, encephalitis, and brain abscesses. These conditions can lead to long-term neurological deficits, cognitive impairments, and other complications that persist after the initial infection has resolved. The sequelae may manifest as motor deficits, sensory disturbances, seizures, or cognitive dysfunction, significantly impacting the patient's quality of life. Accurate coding of G09 requires a thorough understanding of the patient's history of CNS infections and the specific sequelae they are experiencing. Documentation should detail the nature of the initial inflammatory disease, the treatment received, and the ongoing effects on the patient's health. This code is crucial for tracking the long-term impacts of CNS infections and ensuring appropriate care and resource allocation.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Differentiating between acute and chronic sequelae
  • Understanding the specific inflammatory disease that led to the sequelae
  • Documenting the patient's history accurately
  • Identifying associated neurological deficits

Audit Risk Factors

  • Inadequate documentation of the initial inflammatory disease
  • Failure to specify the nature of sequelae
  • Incorrect linkage between the sequelae and the original condition
  • Lack of follow-up documentation on the patient's progress

Specialty Focus

Medical Specialties

Neurology

Documentation Requirements

Detailed history of CNS infections, neurological assessments, and treatment plans.

Common Clinical Scenarios

Patients with a history of meningitis presenting with cognitive deficits or seizures.

Billing Considerations

Ensure that all neurological assessments are documented to support the diagnosis of sequelae.

Infectious Disease

Documentation Requirements

Comprehensive records of the infectious disease treatment and follow-up care.

Common Clinical Scenarios

Patients recovering from encephalitis with ongoing neurological symptoms.

Billing Considerations

Document the timeline of infection and recovery to clarify the relationship to sequelae.

Coding Guidelines

Inclusion Criteria

Use G09 When
  • According to ICD
  • 10 guidelines, G09 should be used when the patient has a documented history of an inflammatory disease of the CNS and is experiencing sequelae
  • It is important to ensure that the sequelae are directly related to the prior condition
  • Coders should also refer to the official coding guidelines for any additional instructions regarding the use of this code

Exclusion Criteria

Do NOT use G09 When
No specific exclusions found.

Related CPT Codes

99214CPT Code

Established patient office visit, level 4

Clinical Scenario

Used for follow-up visits for patients with sequelae of CNS infections.

Documentation Requirements

Document the patient's history, current symptoms, and any neurological assessments.

Specialty Considerations

Neurologists should ensure detailed neurological evaluations are included.

ICD-10 Impact

Diagnostic & Documentation Impact

Enhanced Specificity

ICD-10 Improvements

The transition to ICD-10 has allowed for more specific coding of sequelae, improving the ability to track long-term outcomes of CNS infections. G09 provides a clear framework for documenting the ongoing effects of these conditions, which is essential for patient care and resource allocation.

ICD-9 vs ICD-10

The transition to ICD-10 has allowed for more specific coding of sequelae, improving the ability to track long-term outcomes of CNS infections. G09 provides a clear framework for documenting the ongoing effects of these conditions, which is essential for patient care and resource allocation.

Reimbursement & Billing Impact

The transition to ICD-10 has allowed for more specific coding of sequelae, improving the ability to track long-term outcomes of CNS infections. G09 provides a clear framework for documenting the ongoing effects of these conditions, which is essential for patient care and resource allocation.

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

When should G09 be used?

G09 should be used when a patient has a documented history of an inflammatory disease of the CNS and is experiencing ongoing sequelae related to that condition.