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ICD-10 Guide
ICD-10 CodesChapter 6: Diseases of the nervous systemG64

G64

Billable

Other disorders of peripheral nervous system

Chapter 6:Diseases of the nervous system

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

Code Description

ICD-10 G64 is a billable code used to indicate a diagnosis of other disorders of peripheral nervous system.

Key Diagnostic Point:

The G64 code encompasses a variety of conditions affecting the peripheral nervous system, which includes all nerves outside the brain and spinal cord. Peripheral neuropathies, a significant subset of these disorders, can result from various etiologies such as diabetes mellitus, infections, autoimmune diseases, and toxic exposures. Polyneuropathies, characterized by simultaneous dysfunction of multiple peripheral nerves, often present with symptoms like numbness, tingling, and weakness, typically starting in the distal extremities. Electrodiagnostic studies, including nerve conduction studies (NCS) and electromyography (EMG), are essential for diagnosing these conditions, as they help assess the electrical activity of nerves and muscles, providing critical insights into the nature and extent of nerve damage. Accurate coding for G64 requires a thorough understanding of the underlying causes and clinical manifestations of peripheral nerve disorders, as well as the results of any diagnostic tests performed.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Variety of underlying causes (e.g., diabetes, autoimmune disorders)
  • Overlap with other neurological conditions
  • Need for precise documentation of symptoms and diagnostic tests
  • Potential for misdiagnosis without thorough electrodiagnostic studies

Audit Risk Factors

  • Inadequate documentation of symptoms
  • Failure to include results of electrodiagnostic studies
  • Misclassification of neuropathy type
  • Lack of clarity on the underlying cause of neuropathy

Specialty Focus

Medical Specialties

Neurology

Documentation Requirements

Detailed clinical history, results of electrodiagnostic studies, and treatment plans.

Common Clinical Scenarios

Patients presenting with symptoms of numbness, tingling, or weakness in extremities.

Billing Considerations

Ensure comprehensive documentation of all diagnostic tests performed and their results.

Endocrinology

Documentation Requirements

Documentation of diabetes management and its impact on peripheral nerve health.

Common Clinical Scenarios

Diabetic patients presenting with neuropathic symptoms.

Billing Considerations

Linking neuropathy to diabetes requires clear documentation of glycemic control.

Coding Guidelines

Inclusion Criteria

Use G64 When
  • According to ICD
  • 10 guidelines, G64 should be used when the specific type of peripheral neuropathy is not classified elsewhere
  • Coders must ensure that the documentation supports the diagnosis and that any underlying conditions are also coded appropriately

Exclusion Criteria

Do NOT use G64 When
No specific exclusions found.

Related CPT Codes

95900CPT Code

Nerve conduction studies

Clinical Scenario

Used to evaluate patients with suspected peripheral neuropathy.

Documentation Requirements

Document the specific nerves tested and the results.

Specialty Considerations

Neurologists must ensure that the rationale for testing is clearly documented.

95860CPT Code

Electromyography

Clinical Scenario

Performed to assess muscle response in patients with suspected neuropathy.

Documentation Requirements

Include details of muscle groups tested and findings.

Specialty Considerations

Documentation should support the need for EMG based on clinical symptoms.

ICD-10 Impact

Diagnostic & Documentation Impact

Enhanced Specificity

ICD-10 Improvements

The transition to ICD-10 has allowed for more specific coding of peripheral nerve disorders, improving the ability to capture the complexity of these conditions. G64 provides a broader category for disorders that may not fit into more specific codes, allowing for better tracking and management of peripheral neuropathies.

ICD-9 vs ICD-10

The transition to ICD-10 has allowed for more specific coding of peripheral nerve disorders, improving the ability to capture the complexity of these conditions. G64 provides a broader category for disorders that may not fit into more specific codes, allowing for better tracking and management of peripheral neuropathies.

Reimbursement & Billing Impact

The transition to ICD-10 has allowed for more specific coding of peripheral nerve disorders, improving the ability to capture the complexity of these conditions. G64 provides a broader category for disorders that may not fit into more specific codes, allowing for better tracking and management of peripheral neuropathies.

Resources

Clinical References

  • •
    ICD-10-CM Official Guidelines for Coding and Reporting
  • •
    American Academy of Neurology - Peripheral Neuropathy

Coding & Billing References

  • •
    ICD-10-CM Official Guidelines for Coding and Reporting
  • •
    American Academy of Neurology - Peripheral Neuropathy

Frequently Asked Questions

What are the common causes of peripheral neuropathy?

Common causes include diabetes, alcohol abuse, vitamin deficiencies, autoimmune diseases, and infections. Each cause may lead to different types of neuropathy, which can affect coding.

How do electrodiagnostic studies assist in diagnosing peripheral neuropathy?

Electrodiagnostic studies, including nerve conduction studies and electromyography, help assess the function of peripheral nerves and muscles, providing critical information for diagnosing the type and severity of neuropathy.