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v1.0.0
ICD-10 Guide
DiagnosesCarotid Artery Disease

Carotid Artery Disease

ICD-10 Coding for Carotid Artery Disease(I65.21, I65.22)

PRIMARY SPECIALTYNeurology
COMPLEXITYHigh
LAST UPDATED09/15/2025
Sam Tuffun, PT, DPT
Physical Therapist | Medical Coding & Billing Contributor

Diagnosis Overview

What is Carotid Artery Disease?
Essential facts and insights about Carotid Artery Disease

Key Clinical Considerations:

  • Transient ischemic attacks (TIAs)
  • Stroke symptoms (e.g., weakness, speech difficulties)
  • Asymptomatic carotid bruits

Clinical Information

Clinical Criteria & Documentation Requirements

  • Patient history of cerebrovascular events
  • Results of carotid imaging (ultrasound, CT, MRI)
  • Assessment of risk factors (hypertension, diabetes)

Coding Guidelines

Usage Guidelines & Examples

  • Follow guidelines for coding carotid artery disease based on severity.
  • Common errors include misclassifying asymptomatic cases.

Code Exclusions

Important Exclusions

  • Cerebral aneurysm
  • Peripheral artery disease
  • I63 (Cerebral infarction)

Related ICD-10 Codes

Primary Codes
433.10
Occlusion and stenosis of carotid artery, unspecified
433.11
Occlusion and stenosis of right carotid artery
433.12
Occlusion and stenosis of left carotid artery
Ancillary Codes
Z86.73
Z79.82
Differential Codes
I63.511
I63.512

Related CPT Codes

CPT codes will be available in a future update.

Specialty Focus

Primary Specialty

Neurology

Specialty Applications

  • Adults with vascular risk factors
  • Neurology and vascular surgery settings

Coding Complexity

High Complexity

This diagnosis requires careful attention to:

  • Comprehensive clinical documentation
  • Accurate code selection based on clinical criteria
  • Proper exclusion considerations
  • Specialty-specific coding guidelines

Documentation

Documentation Templates

Billing Information

Billing Considerations

  • Ensure proper documentation for billing
  • Verify code specificity requirements
  • Check for any additional codes needed
  • Review payer-specific guidelines

Common Issues

  • Insufficient clinical documentation
  • Incorrect code selection
  • Missing supporting diagnoses
  • Timing and frequency documentation

Frequently Asked Questions

Documentation requirements?

Document all clinical findings, imaging results, and risk factors.

Billing considerations?

Ensure accurate coding based on imaging and clinical assessments.