2027 ICD-10-CM Diagnosis Code I87.9Disorder of vein, unspecified

ICD-10-CM Codes›I00–I99›I80-I89›I87

ICD-10-CM I87.9
CMSSource: CMS FY 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

I87.9 is a billable ICD-10-CM diagnosis code for disorder of vein, unspecified. It is valid on HIPAA claims for fiscal year 2027 (October 1, 2026 through September 30, 2027) and groups to MS-DRG 302 through 303. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Other specified diseases of veins and lymphatics.

Code Identity

ICD-10-CM Code
I87.9
Billable Status
Yes — Valid for Submission
Code Describes
Disorder of vein, unspecified
Short Description
Disorder of vein, unspecified
Same as the full description in the CMS dataset.
Parent Code
I87
Other disorders of veins

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 CodeI87.9Disorder of vein, unspecified

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Abnormality of right inferior caval vein
  • Abnormality of systemic vein
  • Acquired abnormality of brachiocephalic vein
  • Acquired abnormality of femoral vein
  • Acquired abnormality of iliac vein
  • Acquired abnormality of inferior vena cava
  • Acquired abnormality of jugular vein
  • Acquired abnormality of left femoral vein
  • Acquired abnormality of left iliac vein
  • Acquired abnormality of pulmonary venous structure
  • Acquired abnormality of right femoral vein
  • Acquired abnormality of right iliac vein
  • Acquired abnormality of superior vena cava
  • Acquired abnormality of systemic vein
  • Disorder of hepatic portal vein
  • Disorder of skin of lower limb due to disorder of vein of lower limb
  • Disorder of superior vena cava due to procedure
  • Disorder of vein
  • Disorder of vein of lower extremity
  • Erectile dysfunction due to disorder of blood vessel
  • Erectile dysfunction due to venous disorder
  • Lymphedema due to venous disease
  • Peripheral vein complication following surgery
  • Postprocedural inferior vena cava complication

Instructional NotesGuidance

Instructions from the official ICD-10-CM Tabular List that apply to I87.9: its own notes plus those printed at Chapter 9. A note printed at a category, block or chapter applies to every code under it.

Excludes2

Not included here: the excluded condition is not part of this code, but a patient may have both, so both codes may be reported.

From Chapter 9 (I00-I99) Diseases of the circulatory system applies to 1,433 codes
  • certain conditions originating in the perinatal period (P04-P96)
  • certain infectious and parasitic diseases (A00-B99)
  • complications of pregnancy, childbirth and the puerperium (O00-O9A)
  • congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99)
  • endocrine, nutritional and metabolic diseases (E00-E88)
  • injury, poisoning and certain other consequences of external causes (S00-T88)
  • neoplasms (C00-D49)
  • symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)
  • systemic connective tissue disorders (M30-M36)
  • transient cerebral ischemic attacks and related syndromes (G45.-)

Source: CMS ICD-10-CM Tabular List. How to read instructional notes.

Index to Diseases and InjuriesGuidance

Alphabetical index entries that point to this code.

Clinical ClassificationClinical

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

CCSR CIR039
Other specified diseases of veins and lymphatics
Default principal diagnosis: inpatient Yes · outpatient Yes

Patient EducationClinical

Vascular Diseases

Your vascular system is your body's network of blood vessels. It includes your:

The full article covers:

  • What are vascular diseases?
  • What causes vascular diseases?
  • Who is at risk for vascular diseases?
  • What are the symptoms of vascular diseases?
  • How are vascular diseases diagnosed?
  • How are vascular diseases treated?
  • Can vascular diseases be prevented?

Read the full article at MedlinePlus

Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.

Convert I87.9 to ICD-9-CMHistory

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

ICD-9-CM
459.9 Circulatory disease NOS
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 2017–2026No changes
FY 2027CurrentCurrent code set, no changesEffective October 1, 2026 through September 30, 2027.

Questions About I87.9Overview

What is the ICD-10 code for disorder of vein, unspecified?

The ICD-10-CM code for disorder of vein, unspecified is I87.9 (sometimes written as I879). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

Is I87.9 (Other disorders of veins) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report disorder of vein, unspecified on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

What MS-DRG does I87.9 group to?

When disorder of vein, unspecified is the principal diagnosis on an inpatient stay, it groups to MS-DRG 302, 303, with relative weights from 0.6610 to 1.1993 depending on complications. Higher weights mean higher Medicare reimbursement.

What is the ICD-9 equivalent of I87.9?

Under the General Equivalence Mappings, disorder of vein, unspecified converts to ICD-9-CM 459.9 (circulatory disease NOS). The mapping is approximate, so confirm the match fits the documentation.