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ICD-10 Guide
DiagnosesAortoiliac Occlusive Disease

Aortoiliac Occlusive Disease

ICD-10 Coding for Aortoiliac Occlusive Disease(I70.23, I70.24)

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

Diagnosis Overview

What is Aortoiliac Occlusive Disease?
Essential facts and insights about Aortoiliac Occlusive Disease

Key Clinical Considerations:

  • Patients may present with claudication, which is pain in the buttocks, thighs, or calves during physical activity due to inadequate blood flow.
  • Doppler ultrasound may reveal reduced or absent blood flow in the aortoiliac region.
  • Physical examination may show diminished or absent femoral and popliteal pulses.
  • Imaging studies such as CT angiography or MR angiography may demonstrate occlusion or significant stenosis of the aortoiliac arteries.
  • Severity is often classified based on the Rutherford classification, which ranges from asymptomatic to critical limb ischemia.

Clinical Information

Clinical Criteria & Documentation Requirements

  • Medical records must include a detailed history of symptoms, risk factors, and physical examination findings.
  • Specific terminology such as 'aortoiliac occlusive disease' or 'peripheral artery disease' must be used.
  • Examples include documenting the location and severity of claudication and any imaging results.
  • Documentation must establish medical necessity for diagnostic tests and treatments.
  • Quality measures may include documenting patient risk factors and treatment outcomes.

Coding Guidelines

Usage Guidelines & Examples

  • Use I70.23 for aortoiliac occlusive disease with intermittent claudication and I70.24 for aortoiliac occlusive disease with critical limb ischemia.
  • Do not use these codes for patients with isolated femoral artery disease or other peripheral artery diseases not involving the aortoiliac region.
  • I70.20 (Unspecified aortoiliac occlusive disease) may be used when the specific type is not documented.
  • Common errors include using the wrong code for the severity of symptoms; ensure documentation matches the code selected.
  • In complex cases, consider the patient's full clinical picture and any co-existing conditions that may affect coding.

Code Exclusions

Important Exclusions

  • Excludes conditions such as aortic aneurysm or isolated femoral artery disease.
  • Alternative codes for excluded conditions include I71 (Aortic aneurysm) and I70.20 (Unspecified aortoiliac occlusive disease).
  • Conditions are excluded because they involve different anatomical sites or pathophysiological processes.
  • Common mistakes include misclassifying aortoiliac occlusive disease as peripheral artery disease without specifying the location.
  • Related but distinct conditions include chronic venous insufficiency and thromboangiitis obliterans.

Related ICD-10 Codes

Primary Codes
I70.23
Aortoiliac occlusive disease with intermittent claudication
I70.24
Aortoiliac occlusive disease with critical limb ischemia
Ancillary Codes
Z79.82
Differential Codes
I74.09

Related CPT Codes

CPT codes will be available in a future update.

Specialty Focus

Primary Specialty

Vascular Surgery

Specialty Applications

  • This diagnosis applies to patients with peripheral artery disease affecting the aortoiliac region.
  • Patient populations include older adults, particularly those with risk factors such as smoking, diabetes, and hyperlipidemia.
  • Clinical settings include outpatient vascular clinics, inpatient surgical units, and emergency departments.
  • Specialty-specific applications are primarily in vascular surgery and interventional radiology.
  • Treatment contexts include surgical interventions like bypass grafting or endovascular procedures.

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

Template 1

Template: 'Patient diagnosed with aortoiliac occlusive disease based on clinical findings of claudication.'

Template 2

Template: 'Clinical presentation consistent with aortoiliac occlusive disease including intermittent claudication in the lower extremities.'

Template 3

Template: 'Diagnostic criteria for aortoiliac occlusive disease met as evidenced by Doppler ultrasound findings.'

Template 4

Template: 'Treatment plan initiated for aortoiliac occlusive disease with endovascular intervention.'

Template 5

Template: 'Follow-up care for aortoiliac occlusive disease including monitoring of symptoms and vascular status.'

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 documentation is required for this diagnosis?

Documentation must include patient history, physical exam findings, and results from imaging studies.

How does this differ from similar diagnoses?

Aortoiliac occlusive disease specifically involves the aorta and iliac arteries, while other peripheral artery diseases may affect different vessels.

What are common billing considerations?

Ensure that the documentation supports the medical necessity of procedures and that the correct ICD-10 codes are used.

What procedures are typically associated?

Common procedures include angioplasty, stenting, and surgical bypass grafting.

Are there any quality reporting implications?

Quality measures may include tracking patient outcomes and adherence to treatment protocols.