2026 ICD-10-CM Diagnosis Code K63.3Ulcer of intestine
ICD-10-CM Codes›K00–K95›K55-K64›K63
- Billable — Valid for Submission
- Not Chronic
K63.3 is a billable ICD-10-CM diagnosis code for ulcer of intestine. 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.
Code Identity
Code Classification
Approximate SynonymsGuidance
Alternate terms and clinical phrases that map to this code.
- Aphthous ulceration of large intestine
- Bleeding ulcer of large intestine
- Bleeding ulcer of mucosa of large intestine
- Celiac disease
- Celiac disease with diffuse intestinal ulceration
- Chronic enteropathy associated with SLCO2A1 gene
- Chronic non-specific multiple ulcers of small intestine
- Cryptogenic multifocal ulcerous stenosing enteritis
- Diffuse ulcerations of jejunum AND/OR ileum
- Hemorrhagic mucosa of large intestine
- Idiopathic multiple ulcers of small intestine
- Ileal ulcer
- Non-infectious ulceration of small intestine due to autoimmune disease
- Non-infective ulceration of small intestine
- Primary nonspecific ulceration of small intestine
- Proximal colon ulcer
- Sigmoid colon ulcer
- Stercoral ulcer of large intestine
- Superficial ulcer of mucous membrane of large intestine
- Traumatic ulcer of small intestine
- Ulcer of cecum
- Ulcer of intestine due to graft-versus-host disease
- Ulcer of intestine due to immunoglobulin A vasculitis
- Ulcer of mucosa of large intestine
- Ulcer of small intestine caused by foreign body
- Ulcer of small intestine caused by radiation
- Ulcer of small intestine due to Behcet syndrome
- Ulcerated mucosa of colon
- Ulceration of colon
- Ulceration of intestine
- Ulceration of large intestine
- Ulceration of small intestine
Tabular List NotesGuidance
Coding notes and annotation back-references applicable to this code.
Inclusion Terms
- Primary ulcer of small intestine
Type 1 Excludes
- duodenal ulcer K26
- gastrointestinal ulcer K28
- gastrojejunal ulcer K28
- jejunal ulcer K28
- peptic ulcer, site unspecified K27
- ulcer of intestine with perforation K63.1
- ulcer of anus or rectum K62.6
- ulcerative colitis K51
These terms are the conditions for which that code is to be used. The terms may be synonyms of the code title, or, in the case of "other specified" codes, the terms are a list of the various conditions assigned to that code. The inclusion terms are not necessarily exhaustive. Additional terms found only in the Alphabetic Index may also be assigned to a code.
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.
Index to Diseases and InjuriesGuidance
Alphabetical index entries that point to this code.
- Stercoraceous, stercoral ulcer - K63.3
- Ulcer, ulcerated, ulcerating, ulceration, ulcerative
- intestine, intestinal - K63.3
- primary, small intestine - K63.3
- stercoraceous, stercoral - K63.3
- primary of intestine - K63.3
- rectosigmoid - K63.3
- stercoraceous, stercoral - K63.3
External Cause of Injuries IndexGuidance
References for this code in the External Cause of Injuries Index.
- Erosion
- intestine
- Stercoraceous, stercoral ulcer
- Ulcer, ulcerated, ulcerating, ulceration, ulcerative
- intestine, intestinal
- Ulcer, ulcerated, ulcerating, ulceration, ulcerative
- intestine, intestinal
- primary, small intestine
- Ulcer, ulcerated, ulcerating, ulceration, ulcerative
- intestine, intestinal
- stercoraceous, stercoral
- Ulcer, ulcerated, ulcerating, ulceration, ulcerative
- primary of intestine
- Ulcer, ulcerated, ulcerating, ulceration, ulcerative
- rectosigmoid
- Ulcer, ulcerated, ulcerating, ulceration, ulcerative
- stercoraceous, stercoral
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
Clinical InformationClinical
Celiac Disease
a malabsorption syndrome that is precipitated by the ingestion of foods containing gluten, such as wheat, rye, and barley. it is characterized by inflammation of the small intestine, loss of microvilli structure, failed intestinal absorption, and malnutrition.
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 K63.3 to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About K63.3Overview
Is K63.3 (Other diseases of intestine) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report ulcer of intestine on HIPAA-covered claims from October 1, 2025 through September 30, 2026.
What MS-DRG does K63.3 group to?
When ulcer of intestine 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 K63.3?
Under the General Equivalence Mappings, ulcer of intestine converts to ICD-9-CM 569.82 (ulceration of intestine). 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.
