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v1.0.0
ICD-10 Guide
DiagnosesAbdominal Aneurysm

Abdominal Aneurysm

ICD-10 Coding for Abdominal Aortic Aneurysm(I71.40, I71.43)

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

Diagnosis Overview

What is Abdominal Aneurysm?
Essential facts and insights about Abdominal Aortic Aneurysm

Key Clinical Considerations:

  • Presence of a bulge or enlargement in the aorta that is more than 50% larger than normal size
  • Symptoms such as abdominal pain, back pain, or a pulsating sensation in the abdomen

Clinical Information

Clinical Criteria & Documentation Requirements

  • Detailed description of the aneurysm including its size and location
  • Record of any symptoms experienced by the patient
  • Results of diagnostic tests such as ultrasound, CT scan, or MRI

Coding Guidelines

Usage Guidelines & Examples

  • I71.40 is used when the aneurysm is without rupture, while I71.43 is used when the aneurysm has ruptured
  • This differs from I71.00 (Dissection of aorta, unspecified), which is used when the inner layer of the aorta tears

Code Exclusions

Important Exclusions

  • Thoracic aortic aneurysm (I71.1)
  • Dissection of aorta (I71.00)

Related ICD-10 Codes

Primary Codes
I71.40
Abdominal aortic aneurysm, without rupture
I71.43
Abdominal aortic aneurysm, ruptured
Ancillary Codes
I70.-
I10
Differential Codes
I71.3-
I71.42

Related CPT Codes

CPT codes will be available in a future update.

Specialty Focus

Primary Specialty

Vascular Surgery

Specialty Applications

  • Patients with an enlargement in the aorta in the abdomen
  • Scenarios where the abdominal aortic aneurysm has ruptured

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

Patient presents with an abdominal aortic aneurysm measuring [size] located at [location].

Template 2

Abdominal aortic aneurysm has ruptured, requiring immediate surgical intervention.

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 is the difference between I71.40 and I71.43?

I71.40 is used for an abdominal aortic aneurysm without rupture, while I71.43 is used when the aneurysm has ruptured.

When should this code be used?

These codes should be used when a patient is diagnosed with an abdominal aortic aneurysm, either with or without rupture.