2026 ICD-10-CM Diagnosis Code K63.0Abscess of intestine

ICD-10-CM Codes›K00–K95›K55-K64›K63

ICD-10-CM K63.0
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

K63.0 is a billable ICD-10-CM diagnosis code for abscess of intestine. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 371 through 373. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Peritonitis and intra-abdominal abscess.

Code Identity

ICD-10-CM Code
K63.0
Billable Status
Yes — Valid for Submission
Code Describes
Abscess of intestine
Short Description
Abscess of intestine
Same as the full description in the CMS dataset.
Parent Code
K63
Other diseases of intestine

Code Classification

ChapterK00–K95Diseases of the digestive system
SectionK55-K64Other diseases of intestines
CategoryK63Other diseases of intestine
This CodeK63.0Abscess of intestine

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Abscess of intestine
  • Abscess of intestine co-occurrent and due to chronic ulcerative pancolitis
  • Abscess of intestine co-occurrent and due to chronic ulcerative proctitis
  • Abscess of intestine co-occurrent and due to chronic ulcerative rectosigmoiditis
  • Abscess of intestine co-occurrent and due to colonic inflammatory polyps
  • Abscess of intestine co-occurrent and due to Crohn's disease
  • Abscess of intestine co-occurrent and due to Crohn's disease of large intestine
  • Abscess of intestine co-occurrent and due to Crohn's disease of small and large intestine
  • Abscess of intestine co-occurrent and due to Crohn's disease of small intestine
  • Abscess of intestine co-occurrent and due to diverticular disease
  • Abscess of intestine co-occurrent and due to ulcerative colitis
  • Abscess of peritoneum
  • Abscess of sigmoid colon
  • Chronic left-sided ulcerative colitis
  • Chronic proctocolitis
  • Chronic ulcerative pancolitis
  • Chronic ulcerative proctitis
  • Chronic ulcerative rectosigmoiditis
  • Complication due to chronic ulcerative pancolitis
  • Complication due to chronic ulcerative proctitis
  • Complication due to chronic ulcerative rectosigmoiditis
  • Complication due to colonic inflammatory polyps
  • Complication due to Crohn's disease of large intestine
  • Complication due to Crohn's disease of small and large intestines
  • Complication due to Crohn's disease of small intestine
  • Crohn's disease of small and large intestines
  • Infection causing abscess of colon
  • Inflammatory polyposis of intestine
  • Left sided ulcerative colitis
  • Pre-ileal abscess
  • Proctocolitis
  • Proctosigmoiditis
  • Pseudopolyposis of colon
  • Sigmoid colon ulcer
  • Ulcerative pancolitis
  • Ulcerative proctitis
  • Ulcerative proctocolitis

Tabular List NotesGuidance

Coding notes and annotation back-references applicable to this code.

Type 1 Excludes

Type 2 Excludes

  • abscess of anal and rectal regions K61
  • abscess of appendix K35.3

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.

    • Abscess(connective tissue) (embolic) (fistulous) (infective) (metastatic) (multiple) (pernicious) (pyogenic) (septic)
      • bowel
    • Abscess(connective tissue) (embolic) (fistulous) (infective) (metastatic) (multiple) (pernicious) (pyogenic) (septic)
      • colon (wall)
    • Abscess(connective tissue) (embolic) (fistulous) (infective) (metastatic) (multiple) (pernicious) (pyogenic) (septic)
      • fecal
    • Abscess(connective tissue) (embolic) (fistulous) (infective) (metastatic) (multiple) (pernicious) (pyogenic) (septic)
      • intestine, intestinal NEC
    • Abscess(connective tissue) (embolic) (fistulous) (infective) (metastatic) (multiple) (pernicious) (pyogenic) (septic)
      • rectovaginal septum
    • Abscess(connective tissue) (embolic) (fistulous) (infective) (metastatic) (multiple) (pernicious) (pyogenic) (septic)
      • sigmoid

Clinical ClassificationClinical

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

CCSR DIG016
Peritonitis and intra-abdominal abscess
Default principal diagnosis: inpatient Yes · outpatient Yes

Clinical InformationClinical

  • Proctocolitis

    inflammation of the rectum and the distal portion of the colon.

  • Ulcerative Proctitis

    a form of ulcerative colitis where the inflammation is confined to the rectum.

  • Proctosigmoiditis

    inflammation of the sigmoid colon and rectum.

  • Proctocolitis

    inflammation of the rectum and colon.

Patient EducationClinical

Abscess

An abscess is a pocket of pus. You can get an abscess almost anywhere in your body. When an area of your body becomes infected, your body's immune system tries to fight the infection. White blood cells go to the infected area, collect within the damaged tissue, and cause inflammation. During this process, pus forms.

Read the full article at MedlinePlus

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

Convert K63.0 to ICD-9-CMHistory

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

ICD-9-CM
569.5 Intestinal abscess
Approximate The match is approximate rather than exact.

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 K63.0Overview

Is K63.0 (Other diseases of intestine) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report abscess of intestine on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What MS-DRG does K63.0 group to?

When abscess of intestine is the principal diagnosis on an inpatient stay, it groups to MS-DRG 371, 372, 373, with relative weights from 0.7274 to 1.7731 depending on complications. Higher weights mean higher Medicare reimbursement.

What is the ICD-9 equivalent of K63.0?

Under the General Equivalence Mappings, abscess of intestine converts to ICD-9-CM 569.5 (intestinal abscess). The mapping is approximate, so confirm the match fits the documentation.

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.