2026 ICD-10-CM Diagnosis Code I82.551Chronic embolism and thrombosis of right peroneal vein

ICD-10-CM Codes›I00–I99›I80-I89›I82

ICD-10-CM I82.551
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

I82.551 is a billable ICD-10-CM diagnosis code for chronic embolism and thrombosis of right peroneal 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. Coders also document this condition as chronic deep venous thrombosis of calf. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Chronic phlebitis; thrombophlebitis and thromboembolism.

Code Identity

ICD-10-CM Code
I82.551
Billable Status
Yes — Valid for Submission
Code Describes
Chronic embolism and thrombosis of right peroneal vein
Short Description
Chronic embolism and thrombosis of right peroneal vein
Same as the full description in the CMS dataset.
Parent Code
I82.55
Chronic embolism and thrombosis of peroneal 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 CodeI82.551Chronic embolism and thrombosis of right peroneal vein

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Chronic deep venous thrombosis of calf
  • Chronic deep venous thrombosis of right calf
  • Deep venous thrombosis of peroneal vein
  • Right peroneal vein chronic deep venous thrombosis

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

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.

Code History & ChangesHistory

Replacement I82.551 replaces the following previously assigned code(s):

  • I82.591 - Chronic embolism and thrombosis of deep vein of r low extrem
FY 2020AddedAdded to the ICD-10-CM code setEffective October 1, 2019.
FY 2021–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About I82.551Overview

Is I82.551 (Chronic embolism and thrombosis of peroneal vein) a billable code?

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

What MS-DRG does I82.551 group to?

When chronic embolism and thrombosis of right peroneal 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.

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.