ICD-10-CM 2027 diagnosis code
I72.4Aneurysm of artery of lower extremity
I72.4 is a valid, billable ICD-10-CM code for aneurysm of artery of lower extremity. It can be reported on claims for dates of service from October 1, 2026 – September 30, 2027.
Code unchanged since ICD-10-CM took effect on October 1, 2015. Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data
About I72.4
I72.4 is the ICD-10-CM diagnosis code for aneurysm of artery of lower extremity. It belongs to category I72 (other aneurysm), 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 I72 (other aneurysm), I72.4 is specifically for aneurysm of artery of lower extremity. Related codes cover carotid artery (I72.0), artery of upper extremity (I72.1), renal artery (I72.2), iliac artery (I72.3), other precerebral arteries (I72.5), vertebral artery (I72.6), other specified arteries (I72.8) and unspecified site (I72.9).
It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.
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 has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.
Before ICD-10, this condition was coded in ICD-9-CM as 442.3 (aneurysm of artery of lower extremity).
Notes that apply from higher levels
Instructions written at a parent level also apply to I72.4.
› From I72 Other aneurysm
- aneurysm (cirsoid) (false) (ruptured)
- acquired aneurysm (I77.0)
- aneurysm (of) aorta (I71.-)
- aneurysm (of) arteriovenous NOS (Q27.3-)
- carotid artery dissection (I77.71)
- cerebral (nonruptured) aneurysm (I67.1)
- coronary aneurysm (I25.4)
- coronary artery dissection (I25.42)
- dissection of artery NEC (I77.79)
- dissection of precerebral artery, congenital (nonruptured) (Q28.1)
- heart aneurysm (I25.3)
- iliac artery dissection (I77.72)
- precerebral artery, congential (nonruptured) (Q28.1)
- pulmonary artery aneurysm (I28.1)
- renal artery dissection (I77.73)
- retinal aneurysm (H35.0)
- ruptured cerebral aneurysm (I60.7)
- varicose aneurysm (I77.0)
- vertebral artery dissection (I77.74)
Broader instructions also apply from Chapter 9: Diseases of the circulatory system.
Alphabetic index entries
3 entriesTerms in the official ICD-10-CM index that lead to I72.4.
- Aneurysm (anastomotic) (artery) (cirsoid) (diffuse) (false) (fusiform) (multiple) (saccular) › femoral (artery) (ruptured)
- Aneurysm (anastomotic) (artery) (cirsoid) (diffuse) (false) (fusiform) (multiple) (saccular) › lower limb
- Aneurysm (anastomotic) (artery) (cirsoid) (diffuse) (false) (fusiform) (multiple) (saccular) › popliteal (artery) (ruptured)
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
ICD-9-CM equivalent
Converter →- 442.3Aneurysm of artery of lower extremityexact
From the CMS 2018 General Equivalence Mappings (GEMs), the final GEMs release.
Code history
- 2016
- 2017
- 2018
- 2019
- 2020
- 2021
- 2022
- 2023
- 2024
- 2025
- 2026
- 2027
- FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
- No changes since FY2016.
Common questions about I72.4
Is I72.4 billable?
- Yes. I72.4 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can I72.4 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict I72.4 as a principal diagnosis.
Is I72.4 a CC or MCC?
- No. I72.4 is neither a CC nor an MCC under MS-DRG v44.0.
What DRG does I72.4 group to?
- I72.4 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.
What is the ICD-9 code for I72.4?
- The CMS General Equivalence Mappings map I72.4 to ICD-9-CM 442.3.