2026 ICD-10-CM Diagnosis Code I78Diseases of capillaries

ICD-10-CM Codes›I00–I99›I70-I79›I78

ICD-10-CM I78
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

I78 is a non-billable ICD-10-CM category code for diseases of capillaries, so it cannot be submitted on claims. Use a more specific code from this category instead, such as I78.0, I78.1, I78.8, and I78.9.

Code Identity

ICD-10-CM Code
I78
Billable Status
No — Non-Billable Category
Code Describes
Diseases of capillaries
Short Description
Diseases of capillaries
Same as the full description in the CMS dataset.
Chapter
I70-I79
Diseases of arteries, arterioles and capillaries

Code Classification

ChapterI00–I99Diseases of the circulatory system
SectionI70-I79Diseases of arteries, arterioles and capillaries
CategoryI78Diseases of capillaries
This CodeI78Diseases of capillaries

Specific Coding for Diseases of capillariesOverview

Non-specific codes like I78 require more characters. Use one of these billable codes instead:

  • Use I78.0 for Hereditary hemorrhagic telangiectasia

  • Use I78.1 for Nevus, non-neoplastic

  • Use I78.8 for Other diseases of capillaries

  • Use I78.9 for Disease of capillaries, unspecified

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?
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Read the full article at MedlinePlus

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

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 I78Overview

Is I78 (Diseases of capillaries) a billable code?

No. This is a category header that groups the codes for diseases of capillaries, and headers cannot be submitted on claims. Claims for diseases of capillaries need a more specific code from this category, such as I78.0, I78.1, and I78.8.