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ICD-10 Guide
ICD-10 CodesI65.03

I65.03

Billable

Occlusion and stenosis of bilateral vertebral arteries

BILLABLE STATUSYes
IMPLEMENTATION DATEOctober 1, 2015
LAST UPDATED09/06/2025

Code Description

ICD-10 I65.03 is a billable code used to indicate a diagnosis of occlusion and stenosis of bilateral vertebral arteries.

Key Diagnostic Point:

I65.03 refers to the occlusion and stenosis of bilateral vertebral arteries, which are critical vessels supplying blood to the posterior circulation of the brain. Clinically, patients may present with symptoms such as dizziness, vertigo, visual disturbances, or even transient ischemic attacks (TIAs) due to compromised blood flow. The vertebral arteries arise from the subclavian arteries and ascend through the cervical vertebrae, merging to form the basilar artery. Disease progression can lead to significant neurological deficits if not addressed, as reduced blood flow can result in ischemia of the brainstem and cerebellum. Diagnostic considerations include imaging studies such as Doppler ultrasound, CT angiography, or MR angiography to assess the degree of occlusion or stenosis. Risk factors include atherosclerosis, hypertension, and other cardiovascular diseases, making early detection and management crucial to prevent severe complications like stroke.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Diagnostic complexity: Requires imaging and clinical correlation.
  • Treatment complexity: May involve medical management or surgical intervention.
  • Documentation requirements: Detailed clinical notes and imaging reports needed.
  • Coding specificity: Requires precise coding to differentiate from other vascular conditions.

Audit Risk Factors

  • Common coding errors: Misidentifying unilateral occlusion as bilateral.
  • Documentation gaps: Incomplete imaging reports or clinical assessments.
  • Billing challenges: Denials due to lack of supporting documentation for bilateral involvement.

Specialty Focus

Medical Specialties

Neurology

Documentation Requirements

Standard ICD-10-CM documentation requirements apply

Common Clinical Scenarios

Various clinical presentations within this specialty area

Billing Considerations

Follow specialty-specific billing guidelines

Cardiology

Documentation Requirements

Standard ICD-10-CM documentation requirements apply

Common Clinical Scenarios

Various clinical presentations within this specialty area

Billing Considerations

Follow specialty-specific billing guidelines

Related ICD-10 Codes

Related CPT Codes

CPT Code

Clinical Scenario

Documentation Requirements

CPT Code

Clinical Scenario

Documentation Requirements

CPT Code

Clinical Scenario

Documentation Requirements

ICD-10 Impact

Diagnostic & Documentation Impact

Enhanced Specificity

ICD-10 Improvements

The clinical significance of I65.03 lies in its potential to lead to serious neurological outcomes, including stroke. Understanding the epidemiology of vertebral artery occlusion is crucial, as it affects a significant portion of the population, particularly those with cardiovascular risk factors. Quality measures focus on timely diagnosis and management to reduce the incidence of stroke and improve patient outcomes, highlighting the importance of effective healthcare utilization patterns.

ICD-9 vs ICD-10

The clinical significance of I65.03 lies in its potential to lead to serious neurological outcomes, including stroke. Understanding the epidemiology of vertebral artery occlusion is crucial, as it affects a significant portion of the population, particularly those with cardiovascular risk factors. Quality measures focus on timely diagnosis and management to reduce the incidence of stroke and improve patient outcomes, highlighting the importance of effective healthcare utilization patterns.

Reimbursement & Billing Impact

Reimbursement considerations include the necessity of imaging studies to confirm the diagnosis and the potential for additional procedures if intervention is required. Common denials may arise from insufficient documentation linking symptoms to the diagnosis or failure to provide evidence of bilateral involvement. Best practices include ensuring all clinical notes are thorough and that imaging reports are attached to support the claim.

Resources

Clinical References

  • •
    ICD-10 Official Guidelines for I00-I99
  • •
    Clinical Documentation Requirements

Coding & Billing References

  • •
    ICD-10 Official Guidelines for I00-I99
  • •
    Clinical Documentation Requirements

Frequently Asked Questions

What specific conditions are covered by I65.03?

I65.03 covers occlusion and stenosis of both vertebral arteries, which may lead to symptoms of vertebrobasilar insufficiency, including dizziness, ataxia, and visual disturbances. It is important to differentiate this from unilateral occlusion codes.

When should I65.03 be used instead of related codes?

I65.03 should be used when both vertebral arteries are affected by occlusion or stenosis. If only one artery is involved, the appropriate unilateral code (I65.01 or I65.02) should be selected.

What documentation supports I65.03?

Documentation should include imaging studies confirming bilateral occlusion or stenosis, clinical notes detailing symptoms, and any relevant history of cardiovascular disease or risk factors.