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ICD-10 Coding for Dilation of Aorta(I71.21, I71.11)

Complete ICD-10-CM coding and documentation guide for Dilation of Aorta. Includes clinical validation requirements, documentation requirements, and coding pitfalls.

Also known as:

Aortic DilationAortic AneurysmAortic Ectasia

Related ICD-10 Code Ranges

Complete code families applicable to Dilation of Aorta

I71.0-I71.9Primary Range

Aortic aneurysm and dissection

This range includes codes for various types of aortic aneurysms and dissections, which are critical for documenting dilation of the aorta.

Other disorders of arteries and arterioles

This range includes codes for aortic ectasia, which may be used when the dilation does not meet the criteria for an aneurysm.

Code Comparison: When to Use Each Code

Compare key differences between these codes to ensure accurate selection

CodeDescriptionWhen to UseKey Documentation
I71.21Aneurysm of ascending aorta, without ruptureUse when imaging confirms an ascending aortic aneurysm without rupture.
  • CT/MRI showing ≥4.5 cm diameter
  • No hemodynamic instability
I71.11Ruptured aneurysm of ascending aortaUse when there is clinical and imaging evidence of rupture.
  • Imaging showing rupture
  • Clinical signs of rupture such as hypotension

Clinical Decision Support

Always review the patient's clinical documentation thoroughly. When in doubt, choose the more specific code and ensure documentation supports it.

Key Information: ICD-10 code for dilation of the aorta

Essential facts and insights about Dilation of Aorta

The ICD-10 code for dilation of the aorta without rupture is I71.21 for the ascending aorta. For ruptured aneurysms, use I71.11.

Primary ICD-10-CM Codes for dilation of aorta

Aneurysm of ascending aorta, without rupture
Billable Code

Decision Criteria

clinical Criteria

  • Imaging shows an ascending aortic diameter ≥4.5 cm without rupture.

Applicable To

  • Ascending aortic aneurysm

Excludes

  • Ruptured ascending aortic aneurysm (I71.11)

Clinical Validation Requirements

  • CT/MRI showing ≥4.5 cm diameter
  • No hemodynamic instability

Code-Specific Risks

  • Misclassification if rupture is not ruled out

Coding Notes

  • Ensure imaging confirms the absence of rupture.

Ancillary Codes

Additional codes that should be used in conjunction with the main diagnosis codes when applicable.

Essential (primary) hypertension

I10
Use when hypertension is a comorbidity.

Cardiogenic shock

R57.0
Use when shock is a complication of the rupture.

Differential Codes

Alternative codes to consider when ruling out similar conditions to the primary diagnosis.

Ruptured aneurysm of ascending aorta

I71.11
Presence of rupture symptoms such as hypotension or mediastinal hematoma.

Aneurysm of ascending aorta, without rupture

I71.21
No clinical or imaging evidence of rupture.

Documentation & Coding Risks

Avoid these common documentation and coding issues when documenting Dilation of Aorta to ensure proper reimbursement, maintain compliance, and reduce audit risk. These guidelines are particularly important when using ICD-10 code I71.21.

Impact

Clinical: May lead to inappropriate treatment decisions., Regulatory: Non-compliance with coding standards., Financial: Potential for incorrect billing and reimbursement.

Mitigation Strategy

Always confirm rupture status with imaging., Document clinical signs of rupture.

Impact

Reimbursement: May lead to lower reimbursement rates., Compliance: Non-compliance with coding guidelines., Data Quality: Decreases accuracy of clinical data.

Mitigation Strategy

Ensure imaging and documentation specify the exact site and presence of rupture.

Impact

High risk of audit if unspecified codes are used when specific codes are applicable.

Mitigation Strategy

Ensure detailed documentation and imaging reports are available.

Documentation errors, coding pitfalls, and audit risks are interconnected aspects of medical coding and billing. Addressing all three areas helps ensure accurate coding, optimal reimbursement, and regulatory compliance.

Frequently Asked Questions

Common questions about ICD-10 coding for Dilation of Aorta, with expert answers to help guide accurate code selection and documentation.

Documentation Templates for Dilation of Aorta

Use these documentation templates to ensure complete and accurate documentation for Dilation of Aorta. These templates include all required elements for proper coding and billing.

Aortic Surveillance

Specialty: Cardiology

Required Elements

  • Subjective symptoms
  • Objective findings
  • Imaging review
  • Assessment and plan

Example Documentation

**Subjective**: No chest pain or dyspnea. Denies syncope. **Objective**: BP 138/82 mmHg, HR 72. No murmurs or pulse deficits. **Imaging Review**: CTA: Ascending aorta 4.7 cm (external diameter, mid-sinus level), no dissection. **Assessment**: 1. Thoracic aortic aneurysm (I71.21), degenerative etiology. 2. Hypertension (I10). **Plan**: Beta-blocker titration; repeat CTA in 6 months.

Examples: Poor vs. Good Documentation

Poor Documentation Example
Aortic dilation noted.
Good Documentation Example
Ascending aortic aneurysm measuring 4.8 cm (external diameter) on CTA at mid-sinus level.
Explanation
The good example provides specific measurements and anatomical details necessary for accurate coding.

Need help with ICD-10 coding for Dilation of Aorta? Ask your questions below.

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