2026 ICD-10-CM Diagnosis Code I82.1Thrombophlebitis migrans

ICD-10-CM Codes›I00–I99›I80-I89›I82

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

I82.1 is a billable ICD-10-CM diagnosis code for thrombophlebitis migrans. 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 recurrent idiopathic thrombophlebitis. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Acute phlebitis; thrombophlebitis and thromboembolism.

Code Identity

ICD-10-CM Code
I82.1
Billable Status
Yes — Valid for Submission
Code Describes
Thrombophlebitis migrans
Short Description
Thrombophlebitis migrans
Same as the full description in the CMS dataset.
Parent Code
I82
Other venous embolism and thrombosis

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 CodeI82.1Thrombophlebitis migrans

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Recurrent idiopathic thrombophlebitis
  • Superficial migratory thrombophlebitis
  • Thrombophlebitis migrans

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.

    • Phlebitis(infective) (pyemic) (septic) (suppurative)
      • migrans, migrating (superficial)
    • Syndrome
      • carcinogenic thrombophlebitis
    • Syndrome
      • Trousseau's
    • Thrombophlebitis
      • idiopathic, recurrent
    • Thrombophlebitis
      • migrans, migrating
    • Trousseau's syndrome(thrombophlebitis migrans)

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 I82.1 to ICD-9-CMHistory

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

ICD-9-CM
453.1 Thrombophlebitis migrans
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 I82.1Overview

Is I82.1 (Other venous embolism and thrombosis) a billable code?

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

What MS-DRG does I82.1 group to?

When thrombophlebitis migrans 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 I82.1?

Under the General Equivalence Mappings, thrombophlebitis migrans converts to ICD-9-CM 453.1 (thrombophlebitis migrans). The mapping is a direct match.

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.