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ICD-10 Guide
ICD-10 CodesG23.8

G23.8

Billable

Other specified degenerative diseases of basal ganglia

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

Code Description

ICD-10 G23.8 is a billable code used to indicate a diagnosis of other specified degenerative diseases of basal ganglia.

Key Diagnostic Point:

G23.8 encompasses a variety of degenerative diseases affecting the basal ganglia, which are critical for coordinating movement and regulating motor control. This category includes conditions that do not fit neatly into other specified categories, such as atypical parkinsonism or other movement disorders that may present with symptoms similar to Parkinson's disease but have distinct underlying pathophysiologies. Patients may exhibit a range of symptoms including bradykinesia, rigidity, tremors, and postural instability. The basal ganglia's role in the extrapyramidal system means that these disorders can also lead to non-motor symptoms such as cognitive decline, mood disorders, and autonomic dysfunction. Treatment often involves dopaminergic medications, which aim to alleviate motor symptoms by enhancing dopaminergic activity in the brain. However, the response to treatment can vary significantly among patients, necessitating careful monitoring and adjustment of therapy. Accurate coding is essential for appropriate management and reimbursement, as these conditions can be complex and multifaceted.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Variety of symptoms that overlap with other movement disorders
  • Need for comprehensive patient history to determine the specific condition
  • Potential for misdiagnosis with Parkinson's disease or other extrapyramidal disorders
  • Variability in treatment response to dopaminergic medications

Audit Risk Factors

  • Inadequate documentation of symptoms and treatment response
  • Failure to specify the underlying degenerative disease
  • Misalignment between diagnosis and treatment provided
  • Lack of comprehensive patient history

Specialty Focus

Medical Specialties

Neurology

Documentation Requirements

Detailed neurological examination findings, including motor and non-motor symptoms, and response to treatment.

Common Clinical Scenarios

Diagnosis of atypical parkinsonism, management of movement disorders, and evaluation of treatment efficacy.

Billing Considerations

Neurologists should ensure that all symptoms, including cognitive and mood changes, are documented to support the diagnosis.

Geriatrics

Documentation Requirements

Comprehensive assessment of functional status, cognitive function, and medication management.

Common Clinical Scenarios

Management of elderly patients with movement disorders and polypharmacy considerations.

Billing Considerations

Geriatricians should document the impact of the condition on daily living activities and any co-morbidities.

Coding Guidelines

Inclusion Criteria

Use G23.8 When
  • Follow the official ICD
  • CM coding guidelines, ensuring that the diagnosis is supported by clinical documentation
  • Include details about the specific degenerative disease when applicable, and document any associated symptoms or complications

Exclusion Criteria

Do NOT use G23.8 When
No specific exclusions found.

Related ICD-10 Codes

Related CPT Codes

99214CPT Code

Established patient office visit, level 4

Clinical Scenario

Used for follow-up visits for management of G23.8.

Documentation Requirements

Document history of present illness, review of systems, and assessment of treatment response.

Specialty Considerations

Neurologists should ensure that all relevant symptoms are documented.

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, improving the ability to capture the complexity of conditions like those classified under G23.8. This specificity aids in better patient management and more accurate reimbursement.

ICD-9 vs ICD-10

The transition to ICD-10 has allowed for more specific coding of degenerative diseases, improving the ability to capture the complexity of conditions like those classified under G23.8. This specificity aids in better patient management and more accurate reimbursement.

Reimbursement & Billing Impact

reimbursement.

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 are the common symptoms associated with G23.8?

Common symptoms include bradykinesia, rigidity, tremors, and non-motor symptoms such as cognitive decline and mood disorders.

How do I differentiate G23.8 from Parkinson's disease?

G23.8 is used when the degenerative disease does not meet the criteria for Parkinson's disease, which is specifically coded under G20.