2026 ICD-10-CM Diagnosis Code I82.403Acute embolism and thrombosis of unspecified deep veins of lower extremity, bilateral

ICD-10-CM Codes›I00–I99›I80-I89›I82

ICD-10-CM I82.403
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

I82.403 is a billable ICD-10-CM diagnosis code for acute embolism and thrombosis of unspecified deep veins of lower extremity, bilateral. 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 Acute phlebitis; thrombophlebitis and thromboembolism.

Code Identity

ICD-10-CM Code
I82.403
Billable Status
Yes — Valid for Submission
Code Describes
Acute embolism and thrombosis of unspecified deep veins of lower extremity, bilateral
Short Description
Acute embolism and thombos unsp deep veins of low extrm, bi
Parent Code
I82.40
Acute embolism and thrombosis of unspecified deep veins of lower extremity

Code Classification

ChapterI00–I99Diseases of the circulatory system
SectionI80-I89Diseases of veins, lymphatic vessels and lymph nodes, not elsewhere classified
CategoryI82Other venous embolism and thrombosis
This CodeI82.403Acute embolism and thrombosis of unspecified deep veins of lower extremity, bilateral

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Acute deep vein thrombosis of bilateral lower limbs following coronary artery bypass graft
  • Acute deep vein thrombosis of bilateral lower limbs following procedure
  • Acute deep vein thrombosis of left lower limb following coronary artery bypass graft
  • Acute deep vein thrombosis of left lower limb following procedure
  • Acute deep vein thrombosis of right lower limb following coronary artery bypass graft
  • Acute deep vein thrombosis of right lower limb following procedure
  • Acute deep venous thrombosis of bilateral legs
  • Bilateral deep vein thrombosis of lower extremities

Clinical ClassificationClinical

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

CCSR CIR033
Acute phlebitis; thrombophlebitis and thromboembolism
Default principal diagnosis: inpatient Yes · outpatient Yes

Patient EducationClinical

Deep Vein Thrombosis

Deep vein thrombosis, or DVT, is a blood clot that forms in a vein deep in the body. Most deep vein clots occur in the lower leg or thigh. If the vein swells, the condition is called thrombophlebitis. A deep vein thrombosis can break loose and cause a serious problem in the lung, called a pulmonary embolism.

Read the full article at MedlinePlus

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

Convert I82.403 to ICD-9-CMHistory

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

ICD-9-CM
453.40 Ac DVT/embl low ext NOS
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 I82.403Overview

Is I82.403 a billable code?

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

What MS-DRG does I82.403 group to?

When acute embolism and thrombosis of unspecified deep veins of lower extremity, bilateral 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 I82.403?

Under the General Equivalence Mappings, acute embolism and thrombosis of unspecified deep veins of lower extremity, bilateral converts to ICD-9-CM 453.40 (ac DVT/embl low ext NOS). The mapping is approximate, so confirm the match fits the documentation.

Footnotes

[1] Not chronic - A diagnosis code that does not fit the criteria for chronic condition (duration, ongoing medical treatment, and limitations) is considered not chronic. Some codes designated as not chronic are acute conditions. Other diagnosis codes that indicate a possible chronic condition, but for which the duration of the illness is not specified in the code description (i.e., we do not know the condition has lasted 12 months or longer) also are considered not chronic.