ICD-10 Logo
ICDxICD-10 Medical Coding
ICD-10 Logo
ICDxICD-10 Medical Coding
ICD 10 CodesDiagnoses
ICD 10 CodesDiagnoses
ICD-10 Logo
ICDxICD-10 Medical Coding

Comprehensive ICD-10-CM code reference with AI-powered search capabilities.

© 2025 ICD Code Compass. All rights reserved.

Browse

  • All Chapters
  • All Categories
  • Diagnoses

Tools

  • AI Code Search
ICD-10-CM codes are maintained by the CDC and CMS. This tool is for reference purposes only.
v1.0.0
ICD-10 Guide
DiagnosesAneurysm Of Ascending Aorta Without Rupture

Aneurysm Of Ascending Aorta Without Rupture

ICD-10 Coding for Aneurysm of Ascending Aorta Without Rupture(I71.21)

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

Diagnosis Overview

What is Aneurysm Of Ascending Aorta Without Rupture?
Essential facts and insights about Aneurysm of Ascending Aorta Without Rupture

Key Clinical Considerations:

  • Patients may present with chest pain, dyspnea, or asymptomatic findings during routine examinations.
  • Imaging studies such as echocardiography, CT angiography, or MRI may reveal an enlarged ascending aorta.
  • Physical examination may show a systolic murmur or signs of aortic regurgitation.
  • Imaging findings typically include a dilated ascending aorta without evidence of dissection or rupture.
  • Severity is often assessed based on the diameter of the aorta, with surgical intervention considered for diameters greater than 5.5 cm.

Clinical Information

Clinical Criteria & Documentation Requirements

  • Medical records must document the diagnosis, including the size of the aneurysm and any symptoms.
  • Specific terminology such as 'ascending aortic aneurysm' and 'without rupture' must be used.
  • Examples include: 'Patient diagnosed with an ascending aortic aneurysm measuring 4.5 cm, asymptomatic.'
  • Documentation must demonstrate medical necessity for imaging and follow-up care.
  • Quality measures may include tracking the size of the aneurysm over time and adherence to surveillance protocols.

Coding Guidelines

Usage Guidelines & Examples

  • Use this diagnosis code when a patient has a confirmed ascending aortic aneurysm without rupture, especially in asymptomatic cases.
  • Do not use this code if the patient has a ruptured aneurysm or if the aneurysm is located in a different part of the aorta.
  • Related codes include I71.22 for aortic aneurysm of the descending aorta without rupture.
  • Common errors include misclassifying the aneurysm as ruptured or failing to document the size.
  • In complex cases, ensure to differentiate between aneurysms and other vascular conditions such as dissections.

Code Exclusions

Important Exclusions

  • Excluded conditions include ruptured aortic aneurysms (I71.2) and aortic dissections (I71.0).
  • Alternative codes for excluded conditions include I71.21 for ascending aorta without rupture.
  • Conditions are excluded to ensure accurate coding and appropriate treatment pathways.
  • Common mistakes include coding an ascending aortic aneurysm as a descending one or vice versa.
  • Related but distinct conditions include thoracic aortic aneurysms and aortic dissections.

Related ICD-10 Codes

Primary Codes
I71.21
Aneurysm of ascending aorta without rupture
I71.22
Aneurysm of descending aorta without rupture
Ancillary Codes
I77.810
I79.0
Differential Codes
I71.22
I71.23

Related CPT Codes

CPT codes will be available in a future update.

Specialty Focus

Primary Specialty

Cardiology

Specialty Applications

  • This diagnosis applies to patients with a confirmed diagnosis of ascending aortic aneurysm.
  • Patient populations include adults, particularly those over 50 years old, with risk factors such as hypertension or connective tissue disorders.
  • Clinical settings include outpatient cardiology clinics and inpatient cardiology units.
  • Specialty-specific applications are relevant in cardiology and vascular surgery.
  • Treatment contexts include monitoring and potential surgical intervention based on aneurysm size.

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 ascending aortic aneurysm based on echocardiogram findings.'

Template 2

Template: 'Clinical presentation consistent with ascending aortic aneurysm including chest pain.'

Template 3

Template: 'Diagnostic criteria met as evidenced by CT scan showing a 4.5 cm aneurysm.'

Template 4

Template: 'Treatment plan initiated for ascending aortic aneurysm with regular monitoring scheduled.'

Template 5

Template: 'Follow-up care for ascending aortic aneurysm including imaging every 6 months.'

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, size of the aneurysm, and any symptoms.

How does this differ from similar diagnoses?

This diagnosis specifically refers to the ascending aorta and excludes any ruptured or dissected conditions.

What are common billing considerations?

Ensure that the medical necessity for imaging and follow-up is clearly documented to optimize claims.

What procedures are typically associated?

Commonly associated procedures include echocardiograms and CT scans for monitoring.

Are there any quality reporting implications?

Quality measures may include tracking the size of the aneurysm and adherence to follow-up protocols.