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ICD-10 Guide
DiagnosesAortoiliac Aneurysm

Aortoiliac Aneurysm

ICD-10 Coding for Aortoiliac Aneurysm(I72.3)

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

Diagnosis Overview

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

Key Clinical Considerations:

  • Patients may present with abdominal or back pain, pulsatile abdominal mass, or symptoms of vascular insufficiency.
  • Imaging studies such as ultrasound, CT scan, or MRI may reveal an aortoiliac aneurysm.
  • Physical examination may show a palpable mass in the abdomen or groin area.
  • Imaging findings typically include dilation of the aorta or iliac arteries with a diameter greater than 3 cm.
  • Severity can be assessed based on the size of the aneurysm and the presence of symptoms, with larger aneurysms posing a higher risk of rupture.

Clinical Information

Clinical Criteria & Documentation Requirements

  • Medical records must document the patient's symptoms, imaging results, and clinical findings supporting the diagnosis.
  • Specific terminology such as 'aortoiliac aneurysm' must be used consistently in documentation.
  • Examples include noting the size and location of the aneurysm and any associated symptoms.
  • Documentation must demonstrate medical necessity for any procedures or interventions performed.
  • Quality measures may require documentation of risk factors, treatment plans, and follow-up care.

Coding Guidelines

Usage Guidelines & Examples

  • Use this diagnosis code when a patient has a confirmed aortoiliac aneurysm based on imaging and clinical findings.
  • Do not use this code for patients with aortic dissection or other vascular conditions that do not involve an aneurysm.
  • Related codes include I72.2 (Aneurysm of the thoracic aorta) and I72.4 (Aneurysm of the renal artery), which should be used based on the specific location of the aneurysm.
  • Common coding errors include misclassifying the aneurysm type or failing to document the size and symptoms adequately.
  • In complex cases, ensure that all relevant clinical details are captured to support the diagnosis and any associated procedures.

Code Exclusions

Important Exclusions

  • Conditions explicitly excluded include aortic dissection (I71.0-I71.9) and other aneurysms not involving the aortoiliac region.
  • Alternative codes for excluded conditions may include I71.2 for aortic dissection.
  • Conditions are excluded to ensure accurate coding and appropriate treatment pathways.
  • Common exclusion mistakes include misidentifying the type of aneurysm or failing to document the specific location.
  • Related but distinct conditions include aortic stenosis and peripheral artery disease.

Related ICD-10 Codes

Primary Codes
I72.3
Aortoiliac aneurysm
I72.2
Aneurysm of the thoracic aorta
Ancillary Codes
Z86.73
Differential Codes
I71.4
I77.81

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 a confirmed aortoiliac aneurysm, often seen in older adults.
  • Patient populations at risk include those with a history of smoking, hypertension, and a family history of vascular disease.
  • 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 repair or endovascular stenting for symptomatic or large aneurysms.

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 aneurysm based on imaging findings of [specific findings].'

Template 2

Template: 'Clinical presentation consistent with aortoiliac aneurysm including abdominal pain and pulsatile mass.'

Template 3

Template: 'Diagnostic criteria met as evidenced by CT scan showing aortic dilation of [specific measurements].'

Template 4

Template: 'Treatment plan initiated for aortoiliac aneurysm with endovascular repair scheduled.'

Template 5

Template: 'Follow-up care for aortoiliac aneurysm including monitoring for symptoms and imaging at [specified intervals].'

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 imaging results, clinical symptoms, and any relevant medical history.

How does this differ from similar diagnoses?

Aortoiliac aneurysm is specifically located in the aorta and iliac arteries, unlike thoracic or abdominal aneurysms.

What are common billing considerations?

Ensure that the diagnosis is supported by imaging and clinical findings to optimize reimbursement.

What procedures are typically associated?

Common procedures include endovascular aneurysm repair (EVAR) and open surgical repair.

Are there any quality reporting implications?

Quality measures may include tracking outcomes of surgical interventions and monitoring for complications.