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ICD-10 Guide
DiagnosesAortoiliac Atherosclerosis

Aortoiliac Atherosclerosis

ICD-10 Coding for Aortoiliac Atherosclerosis(I70.0, I70.23-)

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

Diagnosis Overview

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

Key Clinical Considerations:

  • Patients may present with claudication, which is pain in the legs during physical activity due to insufficient 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 classified based on the degree of stenosis (mild, moderate, severe) or presence of critical limb ischemia.

Clinical Information

Clinical Criteria & Documentation Requirements

  • Document the patient's symptoms, duration, and impact on daily activities.
  • Use specific terminology such as 'aortoiliac atherosclerosis' rather than general terms like 'peripheral artery disease'.
  • Examples include: 'Patient presents with claudication symptoms consistent with aortoiliac atherosclerosis.'
  • Document medical necessity for procedures such as angioplasty or bypass surgery.
  • Quality measures may include documenting the patient's functional status and treatment outcomes.

Coding Guidelines

Usage Guidelines & Examples

  • Use I70.0 for aortoiliac atherosclerosis when the condition is confirmed and symptomatic.
  • Do not use this code for patients with atherosclerosis in other vascular territories without aortoiliac involvement.
  • I70.23 may be used for atherosclerosis of the aorta with intermittent claudication.
  • Common errors include using unspecified codes when more specific codes are available.
  • In complex cases, ensure to document all affected vascular territories to select the appropriate code.

Code Exclusions

Important Exclusions

  • Do not code for aortoiliac atherosclerosis if the patient has only femoral artery disease.
  • Alternative codes for excluded conditions include I73.9 for unspecified peripheral vascular disease.
  • Conditions are excluded to ensure accurate representation of the patient's vascular status.
  • Avoid confusion with codes for venous diseases or other arterial diseases.
  • Related but distinct conditions include aortic aneurysm or thromboembolic disease.

Related ICD-10 Codes

Primary Codes
I70.0
Aortoiliac atherosclerosis
I70.23
Atherosclerosis of aorta with intermittent claudication
Ancillary Codes
E11.51
L97.5-
Differential Codes
I74.09
I73.9

Related CPT Codes

CPT codes will be available in a future update.

Specialty Focus

Primary Specialty

Vascular Surgery

Specialty Applications

  • Patients with atherosclerotic disease affecting the aortoiliac region.
  • Typically affects older adults, particularly males with risk factors such as smoking and diabetes.
  • Clinical settings include outpatient vascular clinics and inpatient surgical units.
  • Relevant for vascular surgery specialists and interventional radiologists.
  • Used in treatment contexts involving revascularization 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 atherosclerosis based on clinical findings of claudication.'

Template 2

Template: 'Clinical presentation consistent with aortoiliac atherosclerosis including intermittent leg pain.'

Template 3

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

Template 4

Template: 'Treatment plan initiated for aortoiliac atherosclerosis with angioplasty scheduled.'

Template 5

Template: 'Follow-up care for aortoiliac atherosclerosis 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?

Detailed documentation of symptoms, diagnostic tests, and treatment plans is essential.

How does this differ from similar diagnoses?

Aortoiliac atherosclerosis specifically involves the aorta and iliac arteries, unlike femoral or popliteal artery diseases.

What are common billing considerations?

Ensure that the diagnosis is clearly linked to the procedures performed for optimal reimbursement.

What procedures are typically associated?

Common procedures include angioplasty, stenting, and bypass surgery.

Are there any quality reporting implications?

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