I71.21 – Aneurysm of the ascending aorta, without rupture
ICD-10-CM 2027 diagnosis code · Diseases of arteries, arterioles and capillaries
ICD-10-CM code
I71.21
- Code
I71.21(claims format:I7121)- Description
- Aneurysm of the ascending aorta, without rupture
- Billable
- Yes – valid for HIPAA-covered transactions
- Valid for
- Dates of service October 1, 2026 – September 30, 2027 (FY2027)
- Chapter
- 9. Diseases of the circulatory system (I00-I99)
- Block
- I70-I79 Diseases of arteries, arterioles and capillaries
- Parent codes
- I71 › I71.2
Notes inherited from parent codes
Instructional notes at a category or block level apply to every code below it.
I71 – Aortic aneurysm and dissection
Index terms for I71.21
Entries in the ICD-10-CM alphabetic index that lead to this code:
Related codes in I71.2
Frequently asked questions
What is ICD-10 code I71.21?
I71.21 is the ICD-10-CM code for aneurysm of the ascending aorta, without rupture, in the block I70-I79 (Diseases of arteries, arterioles and capillaries).
Is I71.21 a billable code?
Yes. I71.21 is a billable/specific code that can be used to indicate a diagnosis for reimbursement purposes.
What category does I71.21 belong to?
It belongs to category I71 – Aortic aneurysm and dissection.
Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.