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ICD-10 Guide
ICD-10 CodesI63.012

I63.012

Billable

Cerebral infarction due to thrombosis of left vertebral artery

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

Code Description

ICD-10 I63.012 is a billable code used to indicate a diagnosis of cerebral infarction due to thrombosis of left vertebral artery.

Key Diagnostic Point:

Cerebral infarction due to thrombosis of the left vertebral artery is a type of ischemic stroke that occurs when a blood clot obstructs blood flow in the left vertebral artery, leading to a reduction in oxygen supply to the brain tissue supplied by this artery. Clinically, patients may present with sudden onset of neurological deficits, which can include unilateral weakness, speech difficulties, and visual disturbances, depending on the area of the brain affected. The left vertebral artery is a critical vessel that contributes to the posterior circulation of the brain, and its occlusion can lead to significant morbidity. Disease progression can vary; some patients may experience transient ischemic attacks (TIAs) prior to a full stroke, while others may have a rapid decline in function. Diagnostic considerations include neuroimaging studies such as CT or MRI to confirm the presence of an infarct and to rule out hemorrhagic stroke. Additionally, vascular imaging may be necessary to visualize the vertebral arteries and assess for thrombosis or stenosis. Early intervention is crucial to minimize brain damage and improve outcomes.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Diagnostic complexity: Requires imaging and clinical correlation to confirm diagnosis.
  • Treatment complexity: May involve anticoagulation, rehabilitation, and management of risk factors.
  • Documentation requirements: Detailed clinical notes and imaging reports are necessary.
  • Coding specificity: Requires precise coding to differentiate from other types of strokes.

Audit Risk Factors

  • Common coding errors: Misidentification of the affected artery or type of stroke.
  • Documentation gaps: Incomplete clinical notes or lack of imaging reports.
  • Billing challenges: Potential for denials if documentation does not support the diagnosis.

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

Emergency Medicine

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

Cerebral infarction due to thrombosis of the left vertebral artery has significant clinical implications, as it can lead to long-term disability and increased healthcare utilization. The condition is a major contributor to stroke-related morbidity and mortality, impacting population health significantly. Quality measures focus on timely diagnosis and treatment to improve outcomes, while epidemiological studies highlight the importance of addressing risk factors such as hypertension and hyperlipidemia to reduce incidence rates.

ICD-9 vs ICD-10

Cerebral infarction due to thrombosis of the left vertebral artery has significant clinical implications, as it can lead to long-term disability and increased healthcare utilization. The condition is a major contributor to stroke-related morbidity and mortality, impacting population health significantly. Quality measures focus on timely diagnosis and treatment to improve outcomes, while epidemiological studies highlight the importance of addressing risk factors such as hypertension and hyperlipidemia to reduce incidence rates.

Reimbursement & Billing Impact

Reimbursement considerations include ensuring that the diagnosis is clearly linked to the services provided, including imaging and any interventions. Common denials may arise from insufficient documentation or failure to demonstrate medical necessity. Best practices include maintaining thorough clinical notes, ensuring all imaging results are included in the patient's record, and using the most specific codes available to reflect the patient's condition accurately.

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 I63.012?

I63.012 specifically covers cerebral infarction resulting from thrombosis of the left vertebral artery. This includes acute ischemic strokes and may also encompass transient ischemic attacks (TIAs) if they are due to the same underlying cause.

When should I63.012 be used instead of related codes?

I63.012 should be used when the clinical documentation clearly indicates a cerebral infarction due to thrombosis of the left vertebral artery. It is essential to differentiate from other stroke types, such as those caused by embolism or hemorrhage, and to specify laterality.

What documentation supports I63.012?

Documentation should include a detailed history of the patient's symptoms, results from neuroimaging studies confirming the infarction, and any relevant laboratory tests that may indicate thrombosis. Clinical notes should clearly outline the diagnosis and treatment plan.