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Home/Diagnosis/ICD-10 Coding for Dilated Aorta

ICD-10 Coding for Dilated Aorta

I77.810
I71.21

Complete ICD-10-CM coding and documentation guide for icd-10 coding for dilated aorta includes clinical validation requirements, medical necessity guidelines, and coding policies.

Also Known as:
Aortic Ectasia
Aortic Root Dilatation
Ascending Aorta Dilatation
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Key Information: ICD-10 Coding for Dilated Aorta

Essential facts and insights about ICD-10 Coding for Dilated Aorta

Use ICD-10 code I77.810 for thoracic aortic ectasia, ensuring proper documentation in clinical notes.

Primary ICD-10-CM Codes

Thoracic aortic ectasia

Billable Code
I77.810
Billable

Diagnostic Criteria

clinical:
  • Aortic diameter <4.5 cm on imaging
coding:
  • No evidence of aneurysm features

Applicable To

  • • Aortic root dilatation
  • • Ascending aorta dilatation

Important Notes

  • • Ensure accurate measurement documentation to differentiate between ectasia and aneurysm.

Aneurysm of ascending aorta without rupture

Billable Code
I71.21
Billable

Diagnostic Criteria

clinical:
  • Aortic diameter ≥4.5 cm on imaging

Applicable To

  • • Non-ruptured aneurysm of ascending aorta

Important Notes

  • • Ensure documentation specifies the aortic diameter and presence of aneurysm features.
Ancillary Codes

Additional codes that may be used with this diagnosis

Q23.1

Congenital bicuspid aortic valve

Use when BAV is present, as it can contribute to aortic dilatation.

Frequently Asked Questions

What is the ICD-10 code for a dilated aorta?

The ICD-10 code for thoracic aortic ectasia, a form of dilated aorta, is I77.810. For an aneurysm of the ascending aorta without rupture, use I71.21.

When should I use ICD-10 code I71.21?

Use ICD-10 code I71.21 for an aneurysm of the ascending aorta when the diameter is 4.5 cm or greater, indicating an aneurysm.

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