2026 ICD-10-CM Diagnosis Code I74.4Embolism and thrombosis of arteries of extremities, unspecified

ICD-10-CM Codes›I00–I99›I70-I79›I74

ICD-10-CM I74.4
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

I74.4 is a billable ICD-10-CM diagnosis code for embolism and thrombosis of arteries of extremities, unspecified. 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. Coders also document this condition as chronic occlusion of artery of extremity. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Aortic and peripheral arterial embolism or thrombosis.

Code Identity

ICD-10-CM Code
I74.4
Billable Status
Yes — Valid for Submission
Code Describes
Embolism and thrombosis of arteries of extremities, unspecified
Short Description
Embolism and thrombosis of arteries of extremities, unsp
Parent Code
I74
Arterial embolism and thrombosis

Code Classification

ChapterI00–I99Diseases of the circulatory system
SectionI70-I79Diseases of arteries, arterioles and capillaries
CategoryI74Arterial embolism and thrombosis
This CodeI74.4Embolism and thrombosis of arteries of extremities, unspecified

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Chronic occlusion of artery of extremity
  • Digital arterial thrombosis
  • Peripheral arterial embolism
  • Thrombosis of arteries of the extremities

Tabular List NotesGuidance

Coding notes and annotation back-references applicable to this code.

Inclusion Terms

  • Peripheral arterial embolism NOS

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.

    • Embolism(multiple) (paradoxical)
      • artery
        • extremity
    • Embolism(multiple) (paradoxical)
      • artery
        • limb
    • Embolism(multiple) (paradoxical)
      • artery
        • peripheral
    • Embolism(multiple) (paradoxical)
      • peripheral artery NOS
    • Occlusion, occluded
      • artery
        • peripheral
          • thrombotic or embolic
    • Thrombosis, thrombotic(bland) (multiple) (progressive) (silent) (vessel)
      • artery, arteries (postinfectional)
        • limb
    • Thrombosis, thrombotic(bland) (multiple) (progressive) (silent) (vessel)
      • peripheral arteries

Clinical ClassificationClinical

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

CCSR CIR030
Aortic and peripheral arterial embolism or thrombosis
Default principal diagnosis: inpatient Yes · outpatient Yes

Convert I74.4 to ICD-9-CMHistory

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

ICD-9-CM
444.22 Lower extremity embolism
Approximate The match is approximate rather than exact.

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 I74.4Overview

Is I74.4 (Arterial embolism and thrombosis) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report embolism and thrombosis of arteries of extremities, unspecified on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What MS-DRG does I74.4 group to?

When embolism and thrombosis of arteries of extremities, unspecified 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 I74.4?

Under the General Equivalence Mappings, embolism and thrombosis of arteries of extremities, unspecified converts to ICD-9-CM 444.22 (lower extremity embolism). The mapping is approximate, so confirm the match fits the documentation.

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.