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v1.0.0
ICD-10 Guide
DiagnosesCarotid Artery Stenosis

Carotid Artery Stenosis

ICD-10 Coding for Carotid Artery Stenosis(I65.21, I65.22, I65.23, I65.29, I63.0)

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

Diagnosis Overview

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

Key Clinical Considerations:

  • Transient Ischemic Attacks (TIAs)
  • Ischemic stroke symptoms
  • Neurological deficits

Clinical Information

Clinical Criteria & Documentation Requirements

  • Patient history of cerebrovascular events
  • Imaging results (e.g., ultrasound, CT, MRI)
  • Assessment of risk factors (e.g., hypertension, diabetes)

Coding Guidelines

Usage Guidelines & Examples

  • Follow guidelines for coding based on severity and laterality.
  • Common errors include misclassifying the type of stenosis.

Code Exclusions

Important Exclusions

  • Carotid artery occlusion
  • Non-atherosclerotic stenosis

Related ICD-10 Codes

Primary Codes
433.10
Atherosclerotic stenosis of carotid artery, unspecified
433.11
Atherosclerotic stenosis of right carotid artery
433.12
Atherosclerotic stenosis of left carotid artery
Differential Codes
I65.22
I65.21

Related CPT Codes

CPT codes will be available in a future update.

Specialty Focus

Primary Specialty

Neurology

Specialty Applications

  • Patients with a history of TIAs or strokes
  • Neurology clinics 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

What are the documentation requirements?

Document patient history, symptoms, and results of imaging studies.

What are the billing considerations?

Ensure accurate coding based on imaging findings and clinical presentation.