ICD-10-CM 2027 diagnosis code
I71.13Aneurysm of the descending thoracic aorta, ruptured
I71.13 is a valid, billable ICD-10-CM code for aneurysm of the descending thoracic aorta, ruptured. It can be reported on claims for dates of service from October 1, 2026 – September 30, 2027.
Code last changed in FY2023 (effective October 1, 2022). Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data
About I71.13
I71.13 is the ICD-10-CM diagnosis code for aneurysm of the descending thoracic aorta, ruptured. It belongs to category I71 (aortic aneurysm and dissection), block I70-I79 (diseases of arteries, arterioles and capillaries) and chapter 9 (diseases of the circulatory system). It is billable, so it can be reported on its own for dates of service from October 1, 2026 through September 30, 2027.
Within I71.1 (thoracic aortic aneurysm, ruptured), I71.13 is specifically for aneurysm of the descending thoracic aorta, ruptured. Related codes cover unspecified (I71.10), aneurysm of the ascending aorta, ruptured (I71.11) and aneurysm of the aortic arch, ruptured (I71.12).
Code first , if applicable: syphilitic aortic aneurysm (A52.01) and traumatic aortic aneurysm (S25.09, S35.09).
As a secondary diagnosis it is an MCC (major complication or comorbidity), which can move an inpatient stay into the highest-paying "with MCC" MS-DRG of its family, unless the principal diagnosis excludes it.
In MS-DRG v44.0, it is part of the grouping logic for DRG 299 (Peripheral Vascular Disorders with MCC, relative weight 1.5842), DRG 300 (Peripheral Vascular Disorders with CC, relative weight 1.0464) and DRG 301 (Peripheral Vascular Disorders without CC/MCC, relative weight 0.7133), in MDC 05 (Diseases and Disorders of the Circulatory System), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.
It was added in FY2023, effective October 1, 2022.
Notes that apply from higher levels
Instructions written at a parent level also apply to I71.13.
Broader instructions also apply from Chapter 9: Diseases of the circulatory system.
Alphabetic index entries
4 entriesTerms in the official ICD-10-CM index that lead to I71.13.
- Aneurysm (anastomotic) (artery) (cirsoid) (diffuse) (false) (fusiform) (multiple) (saccular) › aorta, aortic (nonsyphilitic) › descending › thoracic › ruptured
- Aneurysm (anastomotic) (artery) (cirsoid) (diffuse) (false) (fusiform) (multiple) (saccular) › aorta, aortic (nonsyphilitic) › thorax, thoracic › descending › ruptured
- Aneurysm (anastomotic) (artery) (cirsoid) (diffuse) (false) (fusiform) (multiple) (saccular) › aorta, aortic (nonsyphilitic) › thorax, thoracic › ruptured › descending
- Rupture, ruptured › aorta, aortic › descending › thoracic
MS-DRG v44.0 grouping
All DRGs →Inpatient MS-DRGs this diagnosis can group to, as the principal or a secondary diagnosis, depending on the rest of the claim.
MDC 05 · Diseases and Disorders of the Circulatory System
Code history
- 2016
- 2017
- 2018
- 2019
- 2020
- 2021
- 2022
- 2023
- 2024
- 2025
- 2026
- 2027
- FY2023 (effective 10/1/2022): Added
- No changes since FY2023.
Common questions about I71.13
Is I71.13 billable?
- Yes. I71.13 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can I71.13 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict I71.13 as a principal diagnosis.
Is I71.13 a CC or MCC?
- I71.13 is an MCC (major complication or comorbidity) under MS-DRG v44.0, unless excluded by the principal diagnosis.
What DRG does I71.13 group to?
- I71.13 is used in the MS-DRG v44.0 logic for MS-DRG 299 (Peripheral Vascular Disorders with MCC), MS-DRG 300 (Peripheral Vascular Disorders with CC) and MS-DRG 301 (Peripheral Vascular Disorders without CC/MCC). Which one applies depends on whether it is the principal diagnosis and on the rest of the claim.