ICD-10-CM code · FY2027
I71.20 Thoracic aortic aneurysm, without rupture, unspecified
BillableValid for claims as a specific diagnosis code
About I71.20
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Coding notes for I71.20
No notes of its own; the notes below apply from the codes above it.
Also applies, from I71 Aortic aneurysm and dissection
Code first Report the underlying condition's code before this one.
Chapter 9 notes (apply to every code in it)
Excludes2 Not part of this condition, but a patient can have both: report both codes when both apply.
- certain conditions originating in the perinatal period (P04-P96)
- certain infectious and parasitic diseases (A00-B99)
- complications of pregnancy, childbirth and the puerperium (O00-O9A)
- congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99)
- endocrine, nutritional and metabolic diseases (E00-E88)
- injury, poisoning and certain other consequences of external causes (S00-T88)
- neoplasms (C00-D49)
- symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)
- systemic connective tissue disorders (M30-M36)
- transient cerebral ischemic attacks and related syndromes (G45.-)
Related codes in I71.2
Latest research on aortic aneurysm
- Aspirin may slow the progression of abdominal aortic aneurysm
- #VisualAbstract: Thoracic endovascular aortic repair is not superior to medical therapy for acute uncomplicated type B aortic dissection
- Initial thoracic endovascular aortic repair not associated with reduced mortality and morbidity compared to medical therapy for acute uncomplicated type B aortic dissection
- Greater thoracic aortic aneurysm size associated with worse long-term outcomes
- Decision aids during surgical consultation effective in aligning patient preferences when choosing between open repair and endovascular repair for abdominal aortic aneurysms
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See 2MM+ plansICD-10-CM FY2027 code set, as published by the CDC National Center for Health Statistics (NCHS) and CMS, effective October 1, 2026 to September 30, 2027. Codes, titles and notes are shown as published. Check payer rules and the official guidelines before billing. This page is not medical advice.
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