2026 ICD-10-CM Diagnosis Code I87.9Disorder of vein, unspecified
ICD-10-CM Codes›I00–I99›I80-I89›I87
- Billable — Valid for Submission
- Not Chronic
I87.9 is a billable ICD-10-CM diagnosis code for disorder of vein, unspecified. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) 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
Code Classification
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
Index to Diseases and InjuriesGuidance
Alphabetical index entries that point to this code.
- Disease, diseased - See Also: Syndrome;
- vein - I87.9
External Cause of Injuries IndexGuidance
References for this code in the External Cause of Injuries Index.
- Disease, diseased
- vein
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
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
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Convert I87.9 to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About I87.9Overview
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, 2025 through September 30, 2026.
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 0.6732 to 1.1966 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.
Footnotes
[1] Not chronic - A diagnosis code that does not fit the criteria for chronic condition (duration, ongoing medical treatment, and limitations) is considered not chronic. Some codes designated as not chronic are acute conditions. Other diagnosis codes that indicate a possible chronic condition, but for which the duration of the illness is not specified in the code description (i.e., we do not know the condition has lasted 12 months or longer) also are considered not chronic.
