2027 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 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

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
Short Description
Vascular disorders of intestine
Same as the full description in the CMS dataset.
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

Instructional NotesGuidance

Instructions from the official ICD-10-CM Tabular List that apply to K55: its own notes plus those printed at Chapter 11. A note printed at a category, block or chapter applies to every code under it.

Excludes1

Not coded here: the excluded code is never reported together with this one, unless the two conditions are unrelated.

  • necrotizing enterocolitis of newborn (P77.-)

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.

On K55 itself
  • angioectasia (angiodysplasia) duodenum (K31.81-)
From Chapter 11 (K00-K95) Diseases of the digestive system applies to 863 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)

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

Clinical InformationClinical

  • Intestinal Vascular Disorder

    a non-neoplastic or neoplastic vascular disorder that affects the intestines.

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 2017–2026No changes
FY 2027CurrentCurrent code set, no changesEffective October 1, 2026 through September 30, 2027.

Questions About K55Overview

What is the ICD-10 code for vascular disorders of intestine?

K55 is the ICD-10-CM category for vascular disorders of intestine, but it is a non-billable header: claims need a more specific code from this category, listed on this page.

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.

Can K55 be reported with a code from P77?

Not as a rule. The Excludes1 note on K55 lists "necrotizing enterocolitis of newborn (P77.-)". An Excludes1 note means the excluded code is never reported together with this one; the only exception is when the two conditions are unrelated to each other (Official Guidelines, Section I.A.12.a).