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I65.21
ICD-10-CM
Right ICA Stenosis

Find information on Right ICA Stenosis diagnosis, including clinical documentation tips, ICD-10 codes (I65.2), medical coding guidelines, carotid artery stenosis treatment options, and best practices for healthcare professionals. Learn about right internal carotid artery stenosis symptoms, diagnostic criteria, and the impact on cerebrovascular health. This resource provides valuable insights for accurate reporting and improved patient care related to right-sided internal carotid artery narrowing.

Also known as

Right Internal Carotid Artery Stenosis
Right Carotid Artery Narrowing

Diagnosis Snapshot

Key Facts
  • Definition : Narrowing of the right internal carotid artery, reducing blood flow to the brain.
  • Clinical Signs : Stroke symptoms (weakness, numbness, speech difficulty), transient ischemic attack (TIA).
  • Common Settings : Vascular surgery clinics, neurology departments, stroke centers, interventional radiology.

Related ICD-10 Code Ranges

Complete code families applicable to AAPC I65.21 Coding
I65-I69

Cerebrovascular diseases

Covers conditions affecting blood flow to the brain, including stenosis.

I67

Other cerebrovascular diseases

Includes specific cerebrovascular diseases not classified elsewhere.

I67.2

Cerebral atherosclerosis

Refers to the buildup of plaque in the arteries supplying the brain.

Code-Specific Guidance

Decision Tree for

Follow this step-by-step guide to choose the correct ICD-10 code.

Is the right ICA stenosis symptomatic?

Code Comparison

Related Codes Comparison

When to use each related code

Description
Right ICA Stenosis
Left ICA Stenosis
Carotid Artery Disease

Documentation Best Practices

Documentation Checklist
  • Document laterality (right), stenosis percentage, and location.
  • Record symptoms (e.g., amaurosis fugax, TIA, stroke).
  • Diagnostic method (e.g., carotid ultrasound, CTA, MRA).
  • Describe any prior interventions or surgeries.
  • Assess and document impact on cerebral perfusion.

Coding and Audit Risks

Common Risks
  • Laterality Coding

    Incorrect coding of laterality (right vs. left ICA) can lead to inaccurate billing and quality reporting. ICD-10-CM coding guidelines must be followed.

  • Stenosis Severity

    Imprecise documentation of stenosis severity (e.g., mild, moderate, severe) impacts code selection and reimbursement. CDI can clarify documentation.

  • Unspecified Stenosis

    Using unspecified codes when more specific documentation is available leads to undercoding and lost revenue. Query physicians for clarification.

Mitigation Tips

Best Practices
  • Document symptom laterality for accurate ICD-10 coding (I65.2).
  • Specify stenosis percentage in operative reports for correct CPT coding.
  • Regular duplex ultrasound follow-up improves CDI and patient outcomes.
  • Timely documentation of interventions ensures compliance and reduces denials.
  • Thorough neuro exam findings support medical necessity for interventions.

Clinical Decision Support

Checklist
  • Verify symptoms: TIA, amaurosis fugax, stroke, bruit
  • Confirm with imaging: Carotid ultrasound, CTA, MRA
  • Assess degree of stenosis: NARROWING PERCENTAGE documented
  • Evaluate risk factors: HTN, smoking, DM, hyperlipidemia
  • Document plan: Medical therapy, surgery, or observation

Reimbursement and Quality Metrics

Impact Summary
  • Right ICA Stenosis reimbursement hinges on accurate ICD-10 (I65.2) and CPT coding for duplex ultrasound, angiography, or intervention.
  • Quality metrics: Stroke prevention measures, medication adherence, and timely follow-up impact hospital performance reporting.
  • Coding errors for Right ICA Stenosis diagnosis lead to claim denials, impacting revenue cycle and reimbursement rates.
  • Accurate documentation of stenosis severity (e.g., percentage) crucial for appropriate coding and optimal reimbursement.

Streamline Your Medical Coding

Let S10.AI help you select the most accurate ICD-10 codes. Our AI-powered assistant ensures compliance and reduces coding errors.

Quick Tips

Practical Coding Tips
  • Code I65.2 for right ICA stenosis
  • Verify laterality in documentation
  • Specify degree of stenosis if known
  • Query physician for clarity if needed
  • Check for associated diagnoses like TIA

Documentation Templates

Patient presents with signs and symptoms suggestive of right internal carotid artery stenosis.  Symptoms include transient ischemic attack, amaurosis fugax, and focal neurological deficits.  The patient reports experiencing temporary vision loss in the right eye and weakness in the left arm.  Physical examination reveals a bruit over the right carotid artery.  Carotid duplex ultrasound demonstrates significant stenosis of the right internal carotid artery, estimated at 70-99% based on peak systolic velocity and end diastolic velocity measurements.  Differential diagnoses include other causes of cerebrovascular disease such as intracranial stenosis, arterial dissection, and cardioembolic stroke.  Given the degree of stenosis and symptoms, the patient is at high risk for stroke.  Management options including carotid endarterectomy, carotid artery stenting, and medical management with antiplatelet therapy and statin therapy were discussed.  Risks and benefits of each treatment option were explained to the patient.  Further evaluation with CTA or MRA of the head and neck is planned to confirm the diagnosis and assess the precise anatomical details of the stenosis.  The patient will be referred to a vascular surgeon for consultation and consideration of carotid revascularization.  ICD-10 code I65.21, Right internal carotid artery stenosis, is assigned.  CPT codes for the diagnostic tests and procedures performed will be documented separately.  The patient's symptoms, diagnostic findings, treatment plan, and prognosis were thoroughly discussed with the patient and documented in the medical record.  Follow-up appointments are scheduled for ongoing monitoring and management of the right internal carotid artery stenosis.