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ICD-10 Guide
DiagnosesAortoiliac Disease

Aortoiliac Disease

ICD-10 Coding for Aortoiliac Disease(I74.09)

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

Diagnosis Overview

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

Key Clinical Considerations:

  • Patients may present with claudication, which is pain in the legs during exertion due to inadequate blood flow.
  • Doppler ultrasound may show reduced blood flow in the aortoiliac region.
  • Physical examination may reveal diminished or absent femoral and popliteal pulses.
  • Imaging studies such as CT angiography or MR angiography may demonstrate stenosis or occlusion in the aortoiliac arteries.
  • Severity can be assessed using the Rutherford classification, which stages the disease based on symptoms and functional impairment.

Clinical Information

Clinical Criteria & Documentation Requirements

  • Medical records must include a detailed history of symptoms, including onset, duration, and exacerbating factors.
  • Specific terminology such as 'aortoiliac occlusive disease' or 'peripheral artery disease' must be documented.
  • Examples include noting the presence of claudication and results from vascular studies.
  • Documentation must establish medical necessity for diagnostic tests and interventions.
  • Quality measures may require documentation of risk factors such as diabetes, hypertension, and smoking status.

Coding Guidelines

Usage Guidelines & Examples

  • Use I74.09 for patients diagnosed with aortoiliac disease confirmed by imaging or clinical findings.
  • Do not use this code for isolated femoral artery disease or other peripheral artery diseases not involving the aortoiliac region.
  • Similar codes include I70.2 (Atherosclerosis of aorta) and I73.9 (Peripheral vascular disease, unspecified).
  • Common errors include misclassifying the site of occlusion; ensure the diagnosis aligns with imaging findings.
  • In complex cases, consider additional codes for coexisting conditions such as diabetes or hypertension.

Code Exclusions

Important Exclusions

  • Excludes conditions such as aortic aneurysm (I71) and isolated femoral artery disease (I70.1).
  • Alternative codes for excluded conditions include I71.9 for unspecified aortic aneurysm.
  • Conditions are excluded due to differing pathophysiology and treatment approaches.
  • Common mistakes include coding aortoiliac disease when the primary issue is in the femoral artery.
  • Related but distinct conditions include chronic venous insufficiency and superficial venous thrombosis.

Related ICD-10 Codes

Primary Codes
I74.09
Aortoiliac disease, unspecified
I70.2
Atherosclerosis of aorta
Ancillary Codes
I70.8
Differential Codes
I74.3
I74.3
if the occlusion is distal to the external iliac arteries.

Related CPT Codes

CPT codes will be available in a future update.

Specialty Focus

Primary Specialty

Vascular Surgery

Specialty Applications

  • Applies to patients with peripheral artery disease affecting the aortoiliac region.
  • Common in older adults, particularly those with risk factors like smoking and diabetes.
  • Clinical settings include outpatient vascular clinics, inpatient surgical units, and emergency departments.
  • Relevant for vascular surgery specialists and interventional radiologists.
  • Used in treatment contexts involving revascularization procedures or lifestyle modification counseling.

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 disease based on clinical findings of claudication and imaging results.'

Template 2

Template: 'Clinical presentation consistent with aortoiliac disease including bilateral leg pain on exertion.'

Template 3

Template: 'Diagnostic criteria met as evidenced by Doppler ultrasound showing reduced blood flow in the aortoiliac region.'

Template 4

Template: 'Treatment plan initiated for aortoiliac disease with recommendations for lifestyle changes and potential surgical intervention.'

Template 5

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

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

What are common billing considerations?

Ensure that all services provided are medically necessary and supported by documentation to optimize claims.

What procedures are typically associated?

Common procedures include angioplasty, stenting, and bypass surgery.

Are there any quality reporting implications?

Quality measures may include monitoring of risk factors and outcomes related to interventions.