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ICD-10 Guide
ICD-10 CodesChapter 6: Diseases of the nervous systemG23

G23

Billable

Other degenerative diseases of basal ganglia

Chapter 6:Diseases of the nervous system

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

Code Description

ICD-10 G23 is a billable code used to indicate a diagnosis of other degenerative diseases of basal ganglia.

Key Diagnostic Point:

G23 encompasses a variety of degenerative diseases affecting the basal ganglia, which are critical for coordinating movement and regulating motor control. This category includes conditions such as Parkinson's disease, which is characterized by tremors, rigidity, bradykinesia, and postural instability. Extrapyramidal disorders, which may arise from the use of certain medications or as a result of neurodegenerative diseases, also fall under this code. Movement disorders, including dystonia and chorea, can be associated with basal ganglia dysfunction. The basal ganglia's role in dopaminergic signaling is crucial, as many of these conditions are linked to dopamine deficiency or receptor dysfunction. Treatment often involves dopaminergic medications, such as levodopa, which can alleviate symptoms but may lead to complications like motor fluctuations and dyskinesias over time. Accurate coding for G23 requires a thorough understanding of the patient's clinical presentation and the underlying pathophysiology of their condition, as well as the impact of treatment regimens on their health status.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Variety of conditions included under G23
  • Overlap with other movement disorders and extrapyramidal symptoms
  • Need for precise documentation of symptoms and treatment responses
  • Potential for misdiagnosis or misclassification

Audit Risk Factors

  • Inadequate documentation of symptoms and treatment
  • Misclassification of movement disorders
  • Failure to document the specific type of degenerative disease
  • Inconsistent use of dopaminergic medication in patient records

Specialty Focus

Medical Specialties

Neurology

Documentation Requirements

Detailed neurological examination findings, including motor function assessments and response to dopaminergic therapy.

Common Clinical Scenarios

Patients presenting with tremors, rigidity, or bradykinesia; follow-up visits for medication management.

Billing Considerations

Ensure clarity in documenting the specific type of movement disorder and any comorbid conditions.

Psychiatry

Documentation Requirements

Assessment of psychiatric symptoms related to movement disorders, including depression or anxiety associated with chronic illness.

Common Clinical Scenarios

Patients with Parkinson's disease experiencing mood disorders or cognitive decline.

Billing Considerations

Document the interplay between psychiatric symptoms and movement disorders for accurate coding.

Coding Guidelines

Inclusion Criteria

Use G23 When
  • According to ICD
  • 10 coding guidelines, G23 should be used when the specific degenerative disease of the basal ganglia is not classified elsewhere
  • Coders must ensure that the documentation supports the diagnosis and that any associated symptoms or conditions are accurately captured

Exclusion Criteria

Do NOT use G23 When
No specific exclusions found.

Related CPT Codes

99213CPT Code

Established patient office visit, Level 3

Clinical Scenario

Used for follow-up visits for patients with G23 to assess symptoms and medication efficacy.

Documentation Requirements

Document the patient's symptoms, treatment plan, and any changes in condition.

Specialty Considerations

Neurologists should ensure comprehensive neurological assessments 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 degenerative diseases of the basal ganglia, improving the ability to capture the nuances of these conditions and their management. This specificity aids in better tracking of patient outcomes and resource allocation.

ICD-9 vs ICD-10

The transition to ICD-10 has allowed for more specific coding of degenerative diseases of the basal ganglia, improving the ability to capture the nuances of these conditions and their management. This specificity aids in better tracking of patient outcomes and resource allocation.

Reimbursement & Billing Impact

The transition to ICD-10 has allowed for more specific coding of degenerative diseases of the basal ganglia, improving the ability to capture the nuances of these conditions and their management. This specificity aids in better tracking of patient outcomes 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

What conditions are included under G23?

G23 includes various degenerative diseases of the basal ganglia that do not fall under more specific categories like Parkinson's disease or secondary parkinsonism. This may include atypical parkinsonian syndromes and other movement disorders.