2026 ICD-10-CM Diagnosis Code K63.1Perforation of intestine (nontraumatic)
ICD-10-CM Codes›K00–K95›K55-K64›K63
- Billable — Valid for Submission
- Not Chronic
K63.1 is a billable ICD-10-CM diagnosis code for perforation of intestine (nontraumatic). 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 Gastrointestinal and biliary perforation.
Code Identity
Code Classification
Approximate SynonymsGuidance
Alternate terms and clinical phrases that map to this code.
- Delayed perforation of colon
- Delayed perforation of duodenum
- Delayed perforation of rectum
- Delayed perforation of small intestine
- Gastrointestinal perforation
- Inflammatory perforation of small intestine
- Injury of sigmoid colon
- Injury of transverse colon
- Nontraumatic perforation of large intestine
- Nontraumatic perforation of small intestine
- Perforated ulcer of intestine
- Perforation of colon
- Perforation of ileum
- Perforation of intestine
- Perforation of intestine due to cystic fibrosis with meconium ileus
- Perforation of jejunum
- Perforation of large intestine
- Perforation of rectum
- Perforation of sigmoid colon
- Perforation of small intestine
- Perforation of terminal ileum
- Perforation of transverse colon
- Perinatal intestinal perforation
- Rupture of colon
- Rupture of ileum
- Rupture of intestine
- Rupture of jejunum
- Rupture of rectum
- Rupture of small intestine
- Spontaneous perforation of large intestine
- Traumatic perforation of large intestine
- Traumatic perforation of rectum
Tabular List NotesGuidance
Coding notes and annotation back-references applicable to this code.
Inclusion Terms
- Perforation (nontraumatic) of rectum
Type 1 Excludes
- perforation nontraumatic of duodenum K26
- perforation nontraumatic of intestine with diverticular disease K57.0 K57.2 K57.4 K57.8
Type 2 Excludes
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.
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.
Index to Diseases and InjuriesGuidance
Alphabetical index entries that point to this code.
- Perforation, perforated (nontraumatic) (of)
- bowel - K63.1
- colon - K63.1
- ileum - K63.1
- intestine NEC - K63.1
- ulcerative NEC - K63.1
- jejunum, jejunal - K63.1
- rectum - K63.1
- sigmoid - K63.1
- bowel (nontraumatic) - K63.1
- colon (nontraumatic) - K63.1
- intestine NEC (nontraumatic) - K63.1
- rectum (nontraumatic) - K63.1
- sigmoid (nontraumatic) - K63.1
- Ulcer, ulcerated, ulcerating, ulceration, ulcerative
- intestine, intestinal - K63.3
- with perforation - K63.1
- perforating - K63.1
- primary of intestine - K63.3
- with perforation - K63.1
- rectosigmoid - K63.3
- with perforation - K63.1
- stercoraceous, stercoral - K63.3
- with perforation - K63.1
External Cause of Injuries IndexGuidance
References for this code in the External Cause of Injuries Index.
- Perforation, perforated(nontraumatic) (of)
- bowel
- Perforation, perforated(nontraumatic) (of)
- colon
- Perforation, perforated(nontraumatic) (of)
- ileum
- Perforation, perforated(nontraumatic) (of)
- intestine NEC
- Perforation, perforated(nontraumatic) (of)
- intestine NEC
- ulcerative NEC
- Perforation, perforated(nontraumatic) (of)
- jejunum, jejunal
- Perforation, perforated(nontraumatic) (of)
- rectum
- Perforation, perforated(nontraumatic) (of)
- sigmoid
- Rupture, ruptured
- bowel (nontraumatic)
- Rupture, ruptured
- colon (nontraumatic)
- Rupture, ruptured
- intestine NEC (nontraumatic)
- Rupture, ruptured
- rectum (nontraumatic)
- Rupture, ruptured
- sigmoid (nontraumatic)
- Ulcer, ulcerated, ulcerating, ulceration, ulcerative
- intestine, intestinal
- with perforation
- Ulcer, ulcerated, ulcerating, ulceration, ulcerative
- intestine, intestinal
- perforating
- Ulcer, ulcerated, ulcerating, ulceration, ulcerative
- primary of intestine
- with perforation
- Ulcer, ulcerated, ulcerating, ulceration, ulcerative
- rectosigmoid
- with perforation
- Ulcer, ulcerated, ulcerating, ulceration, ulcerative
- stercoraceous, stercoral
- with perforation
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
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 K63.1 to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About K63.1Overview
Is K63.1 (Other diseases of intestine) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report perforation of intestine (nontraumatic) on HIPAA-covered claims from October 1, 2025 through September 30, 2026.
What MS-DRG does K63.1 group to?
When perforation of intestine (nontraumatic) 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 K63.1?
Under the General Equivalence Mappings, perforation of intestine (nontraumatic) converts to ICD-9-CM 569.83 (perforation 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.
