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ICD-10 Guide
ICD-10 CodesChapter 6: Diseases of the nervous systemG26

G26

Billable

Extrapyramidal and movement disorders in diseases classified elsewhere

Chapter 6:Diseases of the nervous system

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

Code Description

ICD-10 G26 is a billable code used to indicate a diagnosis of extrapyramidal and movement disorders in diseases classified elsewhere.

Key Diagnostic Point:

G26 encompasses a range of extrapyramidal and movement disorders that arise as secondary conditions due to other diseases. These disorders can manifest as tremors, rigidity, bradykinesia, and postural instability, often seen in conditions such as Parkinson's disease, Huntington's disease, and certain types of encephalopathy. The pathophysiology typically involves dysfunction in the basal ganglia and related neural pathways, which are crucial for the regulation of movement. Patients may experience a variety of symptoms that can significantly impair their quality of life. The management of these disorders often includes dopaminergic medications, which aim to restore the balance of neurotransmitters in the brain. However, the effectiveness of these treatments can vary, and side effects such as dyskinesia may occur, complicating the clinical picture. Accurate coding requires a thorough understanding of the underlying disease and its relationship to the movement disorder, making it essential for coders to be well-versed in both the primary condition and the associated movement disorders.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Requires understanding of the primary disease causing the movement disorder.
  • Differentiation between primary and secondary movement disorders.
  • Potential overlap with other ICD-10 codes for movement disorders.
  • Documentation must specify the relationship between the primary condition and the movement disorder.

Audit Risk Factors

  • Inadequate documentation linking the movement disorder to the primary disease.
  • Misclassification of primary versus secondary movement disorders.
  • Failure to update codes based on changes in patient condition.
  • Inconsistent use of terminology in clinical notes.

Specialty Focus

Medical Specialties

Neurology

Documentation Requirements

Detailed clinical notes outlining the patient's history, examination findings, and the relationship between the primary disease and movement disorder.

Common Clinical Scenarios

Patients with Parkinson's disease presenting with worsening tremors or new onset of rigidity.

Billing Considerations

Neurologists should ensure that all relevant diagnostic tests and treatment responses are documented to support the coding.

Geriatrics

Documentation Requirements

Comprehensive assessment of functional status and cognitive function, along with medication review.

Common Clinical Scenarios

Elderly patients with dementia exhibiting extrapyramidal symptoms due to antipsychotic medications.

Billing Considerations

Geriatricians must consider polypharmacy and its effects on movement disorders.

Coding Guidelines

Inclusion Criteria

Use G26 When
  • According to ICD
  • 10 guidelines, G26 should be used when the movement disorder is a direct result of another disease classified elsewhere
  • Coders must ensure that the primary disease is clearly documented and that the movement disorder is not coded separately unless it is a distinct condition

Exclusion Criteria

Do NOT use G26 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 chronic movement disorders.

Documentation Requirements

Documentation must include history, examination, and medical decision-making.

Specialty Considerations

Neurologists should document neurological assessments thoroughly.

ICD-10 Impact

Diagnostic & Documentation Impact

Enhanced Specificity

ICD-10 Improvements

The transition to ICD-10 has allowed for more specific coding of movement disorders, improving the ability to capture the nuances of secondary conditions like those classified under G26. This specificity aids in better patient management and resource allocation.

ICD-9 vs ICD-10

The transition to ICD-10 has allowed for more specific coding of movement disorders, improving the ability to capture the nuances of secondary conditions like those classified under G26. This specificity aids in better patient management and resource allocation.

Reimbursement & Billing Impact

The transition to ICD-10 has allowed for more specific coding of movement disorders, improving the ability to capture the nuances of secondary conditions like those classified under G26. This specificity aids in better patient management 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 G26 be used?

G26 should be used when a movement disorder is secondary to another disease classified elsewhere, such as Parkinson's disease or Huntington's disease. It is essential to document the primary condition clearly.