2026 ICD-10-CM Diagnosis Code I87.009Postthrombotic syndrome without complications of unspecified extremity
ICD-10-CM Codes›I00–I99›I80-I89›I87
- Billable — Valid for Submission
- Chronic Condition
I87.009 is a billable ICD-10-CM diagnosis code for postthrombotic syndrome without complications of unspecified 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
Code Classification
Approximate SynonymsGuidance
Alternate terms and clinical phrases that map to this code.
- Peripheral venous insufficiency
- Postthrombotic syndrome
- Secondary venous insufficiency of lower limb
- Venous insufficiency of lower limb
Tabular List NotesGuidance
Coding notes and annotation back-references applicable to this code.
Inclusion Terms
- Postthrombotic syndrome NOS
These terms are the conditions for which that code is to be used. The terms may be synonyms of the code title, or, in the case of "other specified" codes, the terms are a list of the various conditions assigned to that code. The inclusion terms are not necessarily exhaustive. Additional terms found only in the Alphabetic Index may also be assigned to a code.
Index to Diseases and InjuriesGuidance
Alphabetical index entries that point to this code.
- Syndrome - See Also: Disease;
- postthrombotic - I87.009
External Cause of Injuries IndexGuidance
References for this code in the External Cause of Injuries Index.
- Syndrome
- postthrombotic
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
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.
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Convert I87.009 to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About I87.009Overview
Is I87.009 (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 unspecified extremity on HIPAA-covered claims from October 1, 2025 through September 30, 2026.
What MS-DRG does I87.009 group to?
When postthrombotic syndrome without complications of unspecified 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 I87.009?
Under the General Equivalence Mappings, postthrombotic syndrome without complications of unspecified 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.
