2026 ICD-10-CM Diagnosis Code K55.20Angiodysplasia of colon without hemorrhage

ICD-10-CM Codes›K00–K95›K55-K64›K55

ICD-10-CM K55.20
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

K55.20 is a billable ICD-10-CM diagnosis code for angiodysplasia of colon without hemorrhage. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 393 through 395. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Other specified and unspecified gastrointestinal disorders and Peripheral and visceral vascular disease.

Code Identity

ICD-10-CM Code
K55.20
Billable Status
Yes — Valid for Submission
Code Describes
Angiodysplasia of colon without hemorrhage
Short Description
Angiodysplasia of colon without hemorrhage
Same as the full description in the CMS dataset.
Parent Code
K55.2
Angiodysplasia of colon

Code Classification

ChapterK00–K95Diseases of the digestive system
SectionK55-K64Other diseases of intestines
CategoryK55Vascular disorders of intestine
This CodeK55.20Angiodysplasia of colon without hemorrhage

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Angiodysplasia of colon
  • Angiodysplasia of duodenum
  • Angiodysplasia of gastrointestinal tract
  • Angiodysplasia of intestine
  • Angiodysplasia of large intestine
  • Angiodysplasia of small intestine
  • Disorder of vascular structure of duodenum
  • Vascular disorder of large intestine
  • Vascular ectasia of cecum

Index to Diseases and InjuriesGuidance

Alphabetical index entries that point to this code.

External Cause of Injuries IndexGuidance

References for this code in the External Cause of Injuries Index.

    • Angiodysplasia(cecum) (colon)

Clinical ClassificationClinical

AHRQ’s CCSR groups this code into broader clinical categories.

CCSR DIG025
Other specified and unspecified gastrointestinal disorders
Default principal diagnosis: inpatient Yes · outpatient Yes
CCSR CIR026
Peripheral and visceral vascular disease
Default principal diagnosis: inpatient No · outpatient No

Patient EducationClinical

Colonic Diseases

Your colon, also known as the large intestine, is part of your digestive system. It's a long, hollow tube at the end of your digestive tract where your body makes and stores stool. Many disorders affect the colon's ability to work properly. Some of these include:

Read the full article at MedlinePlus

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

Convert K55.20 to ICD-9-CMHistory

The closest ICD-9-CM equivalents under the General Equivalence Mappings.

ICD-9-CM
569.84 Angio intes w/o hmrhg
Exact Match The mapping is direct, with no qualifiers.

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 K55.20Overview

Is K55.20 (Angiodysplasia of colon) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report angiodysplasia of colon without hemorrhage on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What MS-DRG does K55.20 group to?

When angiodysplasia of colon without hemorrhage is the principal diagnosis on an inpatient stay, it groups to MS-DRG 393, 394, 395, with relative weights from 0.6490 to 1.5993 depending on complications. Higher weights mean higher Medicare reimbursement.

What is the ICD-9 equivalent of K55.20?

Under the General Equivalence Mappings, angiodysplasia of colon without hemorrhage converts to ICD-9-CM 569.84 (angio intes w/o hmrhg). The mapping is a direct match.

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.