2026 ICD-10-CM Diagnosis Code I87.003Postthrombotic syndrome without complications of bilateral lower extremity

ICD-10-CM Codes›I00–I99›I80-I89›I87

ICD-10-CM I87.003
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

I87.003 is a billable ICD-10-CM diagnosis code for postthrombotic syndrome without complications of bilateral lower extremity. 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 peripheral venous insufficiency. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Postthrombotic syndrome and venous insufficiency/hypertension.

Code Identity

ICD-10-CM Code
I87.003
Billable Status
Yes — Valid for Submission
Code Describes
Postthrombotic syndrome without complications of bilateral lower extremity
Short Description
Postthrom syndrome w/o complications of bilateral low extrm
Parent Code
I87.00
Postthrombotic syndrome without complications

Code Classification

ChapterI00–I99Diseases of the circulatory system
SectionI80-I89Diseases of veins, lymphatic vessels and lymph nodes, not elsewhere classified
CategoryI87Other disorders of veins
This CodeI87.003Postthrombotic syndrome without complications of bilateral lower extremity

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Peripheral venous insufficiency
  • Postthrombotic syndrome
  • Post-thrombotic syndrome of bilateral lower extremities
  • Post-thrombotic syndrome of left lower extremity
  • Post-thrombotic syndrome of right lower extremity
  • Secondary venous insufficiency of lower limb
  • Venous insufficiency of lower limb

Clinical ClassificationClinical

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

CCSR CIR036
Postthrombotic syndrome and venous insufficiency/hypertension
Default principal diagnosis: inpatient Yes · outpatient Yes

Clinical InformationClinical

  • Postthrombotic Syndrome

    a condition caused by one or more episodes of deep vein thrombosis, usually the blood clots are lodged in the legs. clinical features include edema; pain; aching; heaviness; and muscle cramp in the leg. when severe leg swelling leads to skin breakdown, it is called venous stasis ulcer.

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 I87.003 to ICD-9-CMHistory

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

ICD-9-CM
459.10 Postphlbtc synd w/o comp
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 I87.003Overview

Is I87.003 (Postthrombotic syndrome without complications) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report postthrombotic syndrome without complications of bilateral lower extremity on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What MS-DRG does I87.003 group to?

When postthrombotic syndrome without complications of bilateral lower extremity 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 I87.003?

Under the General Equivalence Mappings, postthrombotic syndrome without complications of bilateral lower extremity converts to ICD-9-CM 459.10 (postphlbtc synd w/o comp). 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.