2026 ICD-10-CM Diagnosis Code I72.1Aneurysm of artery of upper extremity

ICD-10-CM CodesI00–I99I70-I79I72

ICD-10-CM I72.1
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

I72.1 is a billable ICD-10-CM diagnosis code for aneurysm of artery of upper extremity. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 299 through 301. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Aortic; peripheral; and visceral artery aneurysms.

Code Identity

ICD-10-CM Code
I72.1
Billable Status
Yes — Valid for Submission
Code Describes
Aneurysm of artery of upper extremity
Short Description
Aneurysm of artery of upper extremity
Same as the full description in the CMS dataset.
Parent Code
Other aneurysm

Code Classification

ChapterI00–I99Diseases of the circulatory system
SectionI70-I79Diseases of arteries, arterioles and capillaries
CategoryI72Other aneurysm
This CodeI72.1Aneurysm of artery of upper extremity

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Aneurysm of artery of left upper limb
  • Aneurysm of artery of right upper limb
  • Aneurysm of artery of upper extremity
  • Aneurysm of axillary artery
  • Aneurysm of left brachial artery
  • Aneurysm of left radial artery
  • Aneurysm of right brachial artery
  • Aneurysm of right radial artery
  • Brachial artery aneurysm
  • False aneurysm of artery
  • False aneurysm of distal brachial artery
  • Pseudoaneurysm of artery of upper extremity
  • Radial artery aneurysm
  • Ulnar artery aneurysm

Index to Diseases and InjuriesGuidance

Alphabetical index entries that point to this code.

External Cause of Injuries IndexGuidance

References for this code in the External Cause of Injuries Index.

    • Aneurysm(anastomotic) (artery) (cirsoid) (diffuse) (false) (fusiform) (multiple) (saccular)
      • radial
    • Aneurysm(anastomotic) (artery) (cirsoid) (diffuse) (false) (fusiform) (multiple) (saccular)
      • ulnar
    • Aneurysm(anastomotic) (artery) (cirsoid) (diffuse) (false) (fusiform) (multiple) (saccular)
      • upper limb (ruptured)

Clinical ClassificationClinical

AHRQ’s CCSR groups this code into broader clinical categories.

CCSR CIR029
Aortic; peripheral; and visceral artery aneurysms
Default principal diagnosis: inpatient Yes · outpatient Yes

Clinical InformationClinical

  • Aneurysm

    pathological outpouching or sac-like dilatation in the wall of any blood vessel (arteries or veins) or the heart (heart aneurysm). it indicates a thin and weakened area in the wall which may later rupture. aneurysms are classified by location, etiology, or other characteristics.
  • Aneurysm, Aortic Arch

    an abnormal balloon- or sac-like dilatation in the wall of the aortic arch.
  • Aneurysm, Ascending Aorta

    an abnormal balloon- or sac-like dilatation in the wall of the ascending aorta.
  • Aneurysm, False

    not an aneurysm but a well-defined collection of blood and connective tissue outside the wall of a blood vessel or the heart. it is the containment of a ruptured blood vessel or heart, such as sealing a rupture of the left ventricle. false aneurysm is formed by organized thrombus and hematoma in surrounding tissue.
  • Aneurysm, Infected

    aneurysm due to growth of microorganisms in the arterial wall, or infection arising within preexisting arteriosclerotic aneurysms.
  • Aneurysm, Ruptured

    the tearing or bursting of the weakened wall of the aneurysmal sac, usually heralded by sudden worsening pain. the great danger of a ruptured aneurysm is the large amount of blood spilling into the surrounding tissues and cavities, causing hemorrhagic shock.
  • Aortic Aneurysm

    an abnormal balloon- or sac-like dilatation in the wall of aorta.
  • Aortic Aneurysm, Abdominal

    an abnormal balloon- or sac-like dilatation in the wall of the abdominal aorta which gives rise to the visceral, the parietal, and the terminal (iliac) branches below the aortic hiatus at the diaphragm.
  • Aortic Aneurysm, Thoracic

    an abnormal balloon- or sac-like dilatation in the wall of the thoracic aorta. this proximal descending portion of aorta gives rise to the visceral and the parietal branches above the aortic hiatus at the diaphragm.
  • Aortic Aneurysm, Thoracoabdominal

    an abnormal balloon- or sac-like dilatation in the wall of abdominal aorta at the aortic hiatus.
  • Aortic Dissection

    a tear in the inner layer of the aorta leading to interstitial hemorrhage, and splitting (dissecting) of the aortic tunica media layer. it typically begins with a tear in the tunica intima layer.
  • Aortic Root Aneurysm

    an abnormal balloon- or sac-like dilatation in the wall of the aortic root.
  • Aortic Rupture

    the tearing or bursting of the wall along any portion of the aorta, such as thoracic or abdominal. it may result from the rupture of an aneurysm or it may be due to trauma.
  • Arteriovenous Fistula

    an abnormal direct communication between an artery and a vein without passing through the capillaries. an a-v fistula usually leads to the formation of a dilated sac-like connection, arteriovenous aneurysm. the locations and size of the shunts determine the degree of effects on the cardiovascular functions such as blood pressure and heart rate.
  • Bone Cysts, Aneurysmal

    fibrous blood-filled cyst in the bone. although benign it can be destructive causing deformity and fractures.
  • Coronary Aneurysm

    abnormal balloon- or sac-like dilatation in the wall of coronary vessels. most coronary aneurysms are due to coronary atherosclerosis, and the rest are due to inflammatory diseases, such as kawasaki disease.
  • Descending Thoracic Aortic Aneurysm

    an abnormal balloon- or sac-like dilatation in the wall of the descending thoracic aorta.
  • Endovascular Aneurysm Repair

    a minimally invasive surgical technique to repair aneurysms through the lumen of a blood vessel.
  • Heart Aneurysm

    a localized bulging or dilatation in the muscle wall of a heart (myocardium), usually in the left ventricle. blood-filled aneurysms are dangerous because they may burst. fibrous aneurysms interfere with the heart function through the loss of contractility. true aneurysm is bound by the vessel wall or cardiac wall. false aneurysms are hematoma caused by myocardial rupture.
  • Iliac Aneurysm

    abnormal balloon- or sac-like dilatation in the wall of any one of the iliac arteries including the common, the internal, or the external iliac artery.
  • Intracranial Aneurysm

    abnormal outpouching in the wall of intracranial blood vessels. most common are the saccular (berry) aneurysms located at branch points in circle of willis at the base of the brain. vessel rupture results in subarachnoid hemorrhage or intracranial hemorrhages. giant aneurysms (>2.5 cm in diameter) may compress adjacent structures, including the oculomotor nerve. (from adams et al., principles of neurology, 6th ed, p841)
  • Microaneurysm

    aneurysm of the microvasculature. charcot–bouchard aneurysms are aneurysms of the brain vasculature which is a common cause of cerebral hemorrhage. retinal microaneurysm is an early diagnostic sign of diabetic retinopathy.
  • Popliteal Artery Aneurysm

    an abnormal balloon- or sac-like dilatation in the wall of the popliteal artery located behind the knee joint.
  • Subarachnoid Hemorrhage

    bleeding into the intracranial or spinal subarachnoid space, most resulting from intracranial aneurysm rupture. it can occur after traumatic injuries (subarachnoid hemorrhage, traumatic). clinical features include headache; nausea; vomiting, nuchal rigidity, variable neurological deficits and reduced mental status.
  • Aorta

    the main trunk of the systemic arteries.
  • Iliac Artery

    either of two large arteries originating from the abdominal aorta; they supply blood to the pelvis, abdominal wall and legs.

Patient EducationClinical

Aneurysms

An aneurysm is a bulge or "ballooning" in the wall of an artery. Arteries are blood vessels that carry oxygen-rich blood from the heart to other parts of the body. If an aneurysm grows large, it can burst and cause dangerous bleeding or even death.

Read the full article at MedlinePlus

Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.

Convert I72.1 to ICD-9-CMHistory

The closest ICD-9-CM equivalents under the General Equivalence Mappings.

ICD-9-CM
442.0 Upper extremity aneurysm
Exact Match The mapping is direct, with no qualifiers.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About I72.1Overview

Is I72.1 (Other aneurysm) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report aneurysm of artery of upper extremity on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What MS-DRG does I72.1 group to?

When aneurysm of artery of upper extremity is the principal diagnosis on an inpatient stay, it groups to MS-DRG 299, 300, 301, with relative weights from 0.7197 to 1.6327 depending on complications. Higher weights mean higher Medicare reimbursement.

What is the ICD-9 equivalent of I72.1?

Under the General Equivalence Mappings, aneurysm of artery of upper extremity converts to ICD-9-CM 442.0 (upper extremity aneurysm). The mapping is a direct match.

Footnotes

[1] Chronic - a chronic condition code indicates a condition lasting 12 months or longer and its effect on the patient based on one or both of the following criteria:

  • The condition results in the need for ongoing intervention with medical products,treatment, services, and special equipment
  • The condition places limitations on self-care, independent living, and social interactions.