2026 ICD-10-CM Diagnosis Code I74.3Embolism and thrombosis of arteries of the lower extremities

ICD-10-CM Codes›I00–I99›I70-I79›I74

ICD-10-CM I74.3
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

I74.3 is a billable ICD-10-CM diagnosis code for embolism and thrombosis of arteries of the lower extremities. 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 and peripheral arterial embolism or thrombosis.

Code Identity

ICD-10-CM Code
I74.3
Billable Status
Yes — Valid for Submission
Code Describes
Embolism and thrombosis of arteries of the lower extremities
Short Description
Embolism and thrombosis of arteries of the lower extremities
Same as the full description in the CMS dataset.
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 CodeI74.3Embolism and thrombosis of arteries of the lower extremities

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Acute occlusion of artery of lower limb
  • Acute occlusion of artery of lower limb co-occurrent and due to thromboembolus
  • Acute occlusion of artery of lower limb due to thrombosis
  • Acute occlusion of common femoral artery due to thromboembolus
  • Acute occlusion of popliteal artery due to thromboembolus
  • Acute occlusion of superficial femoral artery due to thromboembolus
  • Acute occlusion of superficial femoral artery due to thrombosis
  • Acute thromboembolic crural artery occlusion
  • Acute thrombotic common femoral artery occlusion
  • Acute thrombotic crural artery occlusion
  • Acute thrombotic popliteal artery occlusion
  • Arterial obstruction due to thrombotic embolism from aneurysm of artery
  • Arterial obstruction due to thrombotic embolism from aneurysm of popliteal artery
  • Bilateral thrombosis of common femoral arteries
  • Bilateral thrombosis of femoral arteries
  • Common femoral artery occlusion
  • Common femoral artery thrombosis
  • Crural artery thrombosis
  • Embolism and thrombosis of the anterior tibial artery
  • Embolism and thrombosis of the dorsalis pedis artery
  • Embolism and thrombosis of the femoral artery
  • Embolism and thrombosis of the popliteal artery
  • Embolism and thrombosis of the posterior tibial artery
  • Embolism of artery of left lower limb
  • Embolism of artery of right lower limb
  • Embolism of left popliteal artery
  • Embolism of right popliteal artery
  • Femoral artery embolus
  • Femoral artery occlusion
  • Femoral artery thrombosis
  • Femoral popliteal occlusion
  • Lower limb arterial embolus
  • Motor-scooter-handlebar syndrome
  • Occlusion of left femoral artery
  • Occlusion of lower limb artery
  • Occlusion of right femoral artery
  • Popliteal artery embolus
  • Popliteal artery occlusion
  • Popliteal artery thrombosis
  • Profunda femoris artery thrombosis
  • Superficial femoral artery occlusion
  • Superficial femoral artery thrombosis
  • Thromboembolus of artery of lower limb
  • Thrombosis of arteries of lower extremity
  • Thrombosis of artery of bilateral lower limbs
  • Thrombosis of artery of left lower extremity
  • Thrombosis of artery of right lower extremity
  • Thrombosis of bilateral popliteal arteries
  • Thrombosis of left common femoral artery
  • Thrombosis of left femoral artery
  • Thrombosis of left popliteal artery
  • Thrombosis of right common femoral artery
  • Thrombosis of right femoral artery
  • Thrombosis of right popliteal artery

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
          • lower
    • Embolism(multiple) (paradoxical)
      • artery
        • limb
          • lower
    • Embolism(multiple) (paradoxical)
      • extremities
        • lower
          • arterial
    • Embolism(multiple) (paradoxical)
      • leg
        • arterial
    • Embolism(multiple) (paradoxical)
      • popliteal (artery)
    • Thrombosis, thrombotic(bland) (multiple) (progressive) (silent) (vessel)
      • artery, arteries (postinfectional)
        • limb
          • lower
    • Thrombosis, thrombotic(bland) (multiple) (progressive) (silent) (vessel)
      • leg
        • arterial

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 I74.3 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 I74.3Overview

Is I74.3 (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 the lower extremities on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What MS-DRG does I74.3 group to?

When embolism and thrombosis of arteries of the lower extremities 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 I74.3?

Under the General Equivalence Mappings, embolism and thrombosis of arteries of the lower extremities 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.