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  6. 2026 ICD-10-CM Code K55

2026 ICD-10-CM Diagnosis Code K55

Vascular disorders of intestine

ICD-10-CM Code:
K55
ICD-10 Code for:
Vascular disorders of intestine
Is Billable?
Not Valid for Submission
Code Navigator:

K55 is a non-specific and non-billable diagnosis code code, consider using a code with a higher level of specificity from the list below for a diagnosis of vascular disorders of intestine. The code is not specific and is NOT valid for the year 2026 for the submission of HIPAA-covered transactions. Category or Header define the heading of a category of codes that may be further subdivided by the use of 4th, 5th, 6th or 7th characters.

Specific Coding Applicable to Vascular disorders of intestine

Non-specific codes like K55 require more digits to indicate the appropriate level of specificity. Consider using any of the following billable codes with a higher level of specificity when coding for vascular disorders of intestine:

  • K55.0 for Acute vascular disorders of intestine - NON-BILLABLE

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

  • K55.02 for Acute infarction of small intestine - NON-BILLABLE

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

  • K55.04 for Acute infarction of large intestine - NON-BILLABLE

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

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

  • Use K55.1 for Chronic vascular disorders of intestine - BILLABLE

  • K55.2 for Angiodysplasia of colon - NON-BILLABLE

  • Use K55.20 for Angiodysplasia of colon without hemorrhage - BILLABLE

  • Use K55.21 for Angiodysplasia of colon with hemorrhage - BILLABLE

  • K55.3 for Necrotizing enterocolitis - NON-BILLABLE

  • Use K55.30 for Necrotizing enterocolitis, unspecified - BILLABLE

  • Use K55.31 for Stage 1 necrotizing enterocolitis - BILLABLE

  • Use K55.32 for Stage 2 necrotizing enterocolitis - BILLABLE

  • Use K55.33 for Stage 3 necrotizing enterocolitis - BILLABLE

  • Use K55.8 for Other vascular disorders of intestine - BILLABLE

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

Code Classification

  • Diseases of the digestive system
    K00–K95
    • Other diseases of intestines
      K55-K64
      • Vascular disorders of intestine
        K55

Tabular List of Diseases and Injuries

The following annotation back-references are applicable to this diagnosis code. The Tabular List of Diseases and Injuries is a list of ICD-10-CM codes, organized "head to toe" into chapters and sections with coding notes and guidance for inclusions, exclusions, descriptions and more.


Type 1 Excludes

Type 1 Excludes
A type 1 excludes note is a pure excludes note. It means "NOT CODED HERE!" An Excludes1 note indicates that the code excluded should never be used at the same time as the code above the Excludes1 note. An Excludes1 is used when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.
  • necrotizing enterocolitis of newborn P77

Type 2 Excludes

Type 2 Excludes
A type 2 excludes note represents "Not included here". An excludes2 note indicates that the condition excluded is not part of the condition represented by the code, but a patient may have both conditions at the same time. When an Excludes2 note appears under a code, it is acceptable to use both the code and the excluded code together, when appropriate.
  • angioectasia angiodysplasia duodenum K31.81

Patient Education


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.

Your digestive system is a series of hollow organs joined in a long, twisting tube. It runs from your mouth to your anus and includes your esophagus, stomach, and small and large intestines. Your liver, gallbladder and pancreas are also involved. They produce juices to help digestion.

There are many types of digestive disorders. The symptoms vary widely depending on the problem. In general, you should see your doctor if you have:

  • Blood in your stool
  • Changes in bowel habits
  • Severe abdominal pain
  • Unintentional weight loss
  • Heartburn not relieved by antacids

NIH: National Institute of Diabetes and Digestive and Kidney Diseases


[Learn More in MedlinePlus]

Code History

  • FY 2026 - No Change, effective from 10/1/2025 through 9/30/2026
  • FY 2025 - No Change, effective from 10/1/2024 through 9/30/2025
  • FY 2024 - No Change, effective from 10/1/2023 through 9/30/2024
  • FY 2023 - No Change, effective from 10/1/2022 through 9/30/2023
  • FY 2022 - No Change, effective from 10/1/2021 through 9/30/2022
  • FY 2021 - No Change, effective from 10/1/2020 through 9/30/2021
  • FY 2020 - No Change, effective from 10/1/2019 through 9/30/2020
  • FY 2019 - No Change, effective from 10/1/2018 through 9/30/2019
  • FY 2018 - No Change, effective from 10/1/2017 through 9/30/2018
  • FY 2017 - No Change, effective from 10/1/2016 through 9/30/2017
  • FY 2016 - New Code, effective from 10/1/2015 through 9/30/2016. This was the first year ICD-10-CM was implemented into the HIPAA code set.