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Home/Diagnosis/ICD-10 Coding for Ascending Aortic Dilation

ICD-10 Coding for Ascending Aortic Dilation

I77.810
I71.21

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

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

Essential facts and insights about ICD-10 Coding for Ascending Aortic Dilation

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:
  • • Aorta diameter >4.0 cm but <5.5 cm
documentation:
  • • Imaging results specifying aortic diameter

Applicable To

  • • Aortic root dilatation
  • • Ascending aortic dilation

Important Notes

  • • Ensure imaging reports are linked to clinical notes for accurate coding.

Aneurysm of thoracic aorta, without rupture

Billable Code
I71.21
Billable

Diagnostic Criteria

clinical:
  • • Aorta diameter ≥5.5 cm
  • • Rapid growth ≥0.5 cm/year

Applicable To

  • • Thoracic aortic aneurysm

Important Notes

  • • Ensure clinical confirmation of aneurysm criteria.
Ancillary Codes

Additional codes that may be used with this diagnosis

Q25.46

Congenital bicuspid aortic valve

Use when congenital valve anomalies are present alongside dilation.

Frequently Asked Questions

What is the ICD-10 code for ascending aortic dilation?

The ICD-10 code for ascending aortic dilation is I77.810, used for thoracic aortic ectasia without rupture.

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

Use ICD-10 code I71.21 for a thoracic aortic aneurysm when the aorta measures ≥5.5 cm or shows rapid growth.

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