2026 ICD-10-CM Diagnosis Code I82.B29Chronic embolism and thrombosis of unspecified subclavian vein

ICD-10-CM Codes›I00–I99›I80-I89›I82

ICD-10-CM I82.B29
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

I82.B29 is a billable ICD-10-CM diagnosis code for chronic embolism and thrombosis of unspecified subclavian vein. 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. The code is flagged as an unspecified code, since codes identifying laterality exist in the same family. Coders also document this condition as chronic thrombosis of subclavian vein. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Chronic phlebitis; thrombophlebitis and thromboembolism.

Code Identity

ICD-10-CM Code
I82.B29
Billable Status
Yes — Valid for Submission
Code Describes
Chronic embolism and thrombosis of unspecified subclavian vein
Short Description
Chronic embolism and thrombosis of unsp subclavian vein
Parent Code
I82.B2
Chronic embolism and thrombosis of subclavian vein

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.B29Chronic embolism and thrombosis of unspecified subclavian vein

Code EditsBilling

Medicare Code Editor checks that affect claim validity for I82.B29.

Unspecified codes
Unspecified codes exist in the ICD-10-CM classification for circumstances when documentation in the medical record does not provide the level of detail needed to support reporting a more specific code. However, in the inpatient setting, there should generally be very limited and rare circumstances for which the laterality (right, left, bilateral) of a condition is unable to be documented and reported. The following pages contain the list of unspecified ICD-10-CM diagnosis codes for which there is a more specific code to identify laterality (right, left, bilateral) within that code family.

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Chronic thrombosis of subclavian vein

Clinical ClassificationClinical

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

CCSR CIR034
Chronic phlebitis; thrombophlebitis and thromboembolism
Default principal diagnosis: inpatient Yes · outpatient Yes

Convert I82.B29 to ICD-9-CMHistory

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

ICD-9-CM
453.75 Ch emblsm subclav veins
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.B29Overview

Is I82.B29 (Chronic embolism and thrombosis of subclavian vein) a billable code?

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

What MS-DRG does I82.B29 group to?

When chronic embolism and thrombosis of unspecified subclavian vein 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.B29?

Under the General Equivalence Mappings, chronic embolism and thrombosis of unspecified subclavian vein converts to ICD-9-CM 453.75 (ch emblsm subclav veins). 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.