2026 ICD-10-CM Diagnosis Code K55Vascular disorders of intestine

ICD-10-CM Codes›K00–K95›K55-K64›K55

ICD-10-CM K55
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

K55 is a non-billable ICD-10-CM category code for vascular disorders of intestine, so it cannot be submitted on claims. Use a more specific code from this category instead, such as K55.011, K55.012, K55.019, and K55.021.

Code Identity

ICD-10-CM Code
K55
Billable Status
No — Non-Billable Category
Code Describes
Vascular disorders of intestine
Chapter
K55-K64
Other diseases of intestines

Code Classification

ChapterK00–K95Diseases of the digestive system
SectionK55-K64Other diseases of intestines
CategoryK55Vascular disorders of intestine
This CodeK55Vascular disorders of intestine

Specific Coding for Vascular disorders of intestineOverview

Non-specific codes like K55 require more characters. Use one of these billable codes instead:

  • K55.0 for Acute vascular disorders of intestine

  • K55.01 for Acute (reversible) ischemia of small intestine

  • K55.02 for Acute infarction of small intestine

  • K55.03 for Acute (reversible) ischemia of large intestine

  • K55.04 for Acute infarction of large intestine

  • K55.05 for Acute (reversible) ischemia of intestine, part unspecified

  • K55.06 for Acute infarction of intestine, part unspecified

  • Use K55.1 for Chronic vascular disorders of intestine

  • K55.2 for Angiodysplasia of colon

  • Use K55.20 for Angiodysplasia of colon without hemorrhage

  • Use K55.21 for Angiodysplasia of colon with hemorrhage

  • K55.3 for Necrotizing enterocolitis

  • Use K55.30 for Necrotizing enterocolitis, unspecified

  • Use K55.31 for Stage 1 necrotizing enterocolitis

  • Use K55.32 for Stage 2 necrotizing enterocolitis

  • Use K55.33 for Stage 3 necrotizing enterocolitis

  • Use K55.8 for Other vascular disorders of intestine

  • Use K55.9 for Vascular disorder of intestine, unspecified

Tabular List NotesGuidance

Coding notes and annotation back-references applicable to this code.

Type 1 Excludes

  • necrotizing enterocolitis of newborn P77

Type 2 Excludes

  • angioectasia angiodysplasia duodenum K31.81

Patient EducationClinical

Digestive Diseases

When you eat, your body breaks food down to a form it can use to build and nourish cells and provide energy. This process is called digestion.

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 K55Overview

Is K55 (Vascular disorders of intestine) a billable code?

No. This is a category header that groups the codes for vascular disorders of intestine, and headers cannot be submitted on claims. Claims for vascular disorders of intestine need a more specific code from this category, such as K55.011, K55.012, and K55.019.