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ICD-10 Guide
ICD-10 CodesI63.333

I63.333

Billable

Cerebral infarction due to thrombosis of bilateral posterior cerebral arteries

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

Code Description

ICD-10 I63.333 is a billable code used to indicate a diagnosis of cerebral infarction due to thrombosis of bilateral posterior cerebral arteries.

Key Diagnostic Point:

Cerebral infarction due to thrombosis of bilateral posterior cerebral arteries is a critical condition characterized by the obstruction of blood flow to the posterior cerebral arteries, resulting in ischemia and subsequent infarction of brain tissue. Clinically, patients may present with symptoms such as visual disturbances, memory deficits, and sensory loss, depending on the extent and location of the infarction. The posterior cerebral arteries supply blood to the occipital lobe and the inferior part of the temporal lobe, making them crucial for visual processing and memory functions. Disease progression can lead to significant neurological deficits and complications such as seizures or cognitive decline. Diagnostic considerations include neuroimaging studies like CT or MRI, which can reveal areas of infarction, as well as vascular imaging to assess for thrombosis. Early recognition and intervention are vital to minimize long-term disability 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 therapy, rehabilitation, and monitoring.
  • Documentation requirements: Detailed clinical notes and imaging reports are essential.
  • Coding specificity: Requires precise coding to differentiate from other types of cerebral infarctions.

Audit Risk Factors

  • Common coding errors: Misidentification of the affected arteries or incorrect laterality.
  • Documentation gaps: Lack of detailed clinical notes or imaging results.
  • 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

Radiology

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 bilateral posterior cerebral arteries significantly impacts patient quality of life and healthcare resources. It contributes to increased morbidity and mortality rates associated with stroke, necessitating extensive rehabilitation and long-term care. Understanding the epidemiology of this condition helps in developing targeted prevention strategies and improving population health outcomes.

ICD-9 vs ICD-10

Cerebral infarction due to thrombosis of bilateral posterior cerebral arteries significantly impacts patient quality of life and healthcare resources. It contributes to increased morbidity and mortality rates associated with stroke, necessitating extensive rehabilitation and long-term care. Understanding the epidemiology of this condition helps in developing targeted prevention strategies and improving population health outcomes.

Reimbursement & Billing Impact

Reimbursement considerations include the necessity of imaging studies and potential treatments such as anticoagulation therapy. Common denials may arise from insufficient documentation or failure to demonstrate medical necessity. Coders should ensure that all clinical findings, imaging results, and treatment plans are clearly documented to support the claim and avoid billing challenges.

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 I63.333?

I63.333 specifically covers cerebral infarction resulting from thrombosis affecting both posterior cerebral arteries. This includes ischemic strokes that lead to neurological deficits associated with the areas supplied by these arteries.

When should I63.333 be used instead of related codes?

I63.333 should be used when there is confirmed thrombosis of both posterior cerebral arteries, as opposed to unilateral involvement, which would be coded with I63.331 or I63.332. Accurate imaging and clinical findings are essential for differentiation.

What documentation supports I63.333?

Documentation should include imaging studies (CT or MRI) showing bilateral infarction, clinical notes detailing symptoms and neurological examination findings, and any relevant laboratory results that support the diagnosis of thrombosis.