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Home/Diagnosis/ICD-10 Coding for Dilated Ascending Aorta

ICD-10 Coding for Dilated Ascending Aorta

I77.810
I71.21

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

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

Essential facts and insights about ICD-10 Coding for Dilated Ascending 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:
  • • Diameter 40-44mm on imaging
documentation:
  • • Detailed imaging report specifying diameter and location

Applicable To

  • • Aortic root dilatation
  • • Ascending aorta dilatation

Important Notes

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

Ascending aortic aneurysm, without rupture

Billable Code
I71.21
Billable

Diagnostic Criteria

clinical:
  • • Diameter ≥45mm on imaging
documentation:
  • • Surgical consult note

Applicable To

  • • Aneurysm of ascending aorta

Important Notes

  • • Document rupture status clearly to ensure accurate coding.
Ancillary Codes

Additional codes that may be used with this diagnosis

I10

Essential (primary) hypertension

Use when hypertension is a contributing factor.

Q87.4

Marfan syndrome

Use when Marfan syndrome is a contributing factor.

Frequently Asked Questions

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

The ICD-10 code for a dilated ascending aorta is I77.810 for thoracic aortic ectasia. If the dilation meets aneurysm criteria, use I71.21 for ascending aortic aneurysm without rupture.

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

Use ICD-10 code I71.21 for an ascending aortic aneurysm when the diameter is ≥45mm or ≥1.5 times the normal size, indicating aneurysmal proportions.

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