2026 ICD-10-CM Diagnosis Code K50.812Crohn's disease of both small and large intestine with intestinal obstruction

ICD-10-CM Codes›K00–K95›K50-K52›K50

ICD-10-CM K50.812
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

K50.812 is a billable ICD-10-CM diagnosis code for Crohn's disease of both small and large intestine with intestinal obstruction. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 385 through 387. Coders also document this condition as complication due to Crohn's disease of large intestine. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Intestinal obstruction and ileus and Regional enteritis and ulcerative colitis.

Code Identity

ICD-10-CM Code
K50.812
Billable Status
Yes — Valid for Submission
Code Describes
Crohn's disease of both small and large intestine with intestinal obstruction
Short Description
Crohn's disease of both small and lg int w intestinal obst
Parent Code
K50.81
Crohn's disease of both small and large intestine with complications

Code Classification

ChapterK00–K95Diseases of the digestive system
SectionK50-K52Noninfective enteritis and colitis
CategoryK50Crohn's disease [regional enteritis]
This CodeK50.812Crohn's disease of both small and large intestine with intestinal obstruction

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • 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
  • Intestinal obstruction due to Crohn's disease
  • Intestinal obstruction due to Crohn's disease of large intestine
  • Intestinal obstruction due to Crohn's disease of small and large intestine
  • Intestinal obstruction due to Crohn's disease of small intestine

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.

    • Enteritis(acute) (diarrheal) (hemorrhagic) (noninfective)
      • regional (of)
        • large intestine (colon) (rectum)
          • with
            • complication
              • small intestine (duodenum) (ileum) (jejunum) involvement
                • with
                  • complication
                    • intestinal obstruction
    • Enteritis(acute) (diarrheal) (hemorrhagic) (noninfective)
      • regional (of)
        • small intestine (duodenum) (ileum) (jejunum)
          • with
            • complication
              • large intestine (colon) (rectum) involvement
                • with
                  • complication
                    • intestinal obstruction

Clinical ClassificationClinical

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

CCSR DIG012
Intestinal obstruction and ileus
Default principal diagnosis: inpatient No · outpatient No
CCSR DIG011
Regional enteritis and ulcerative colitis
Default principal diagnosis: inpatient Yes · outpatient Yes

Patient EducationClinical

Crohn's Disease

Crohn's disease is a chronic (long-lasting) disease that causes inflammation in your digestive tract. It can affect any part of your digestive tract, which runs from your mouth to your anus. But it usually affects your small intestine and the beginning of your large intestine.

The full article covers:

  • What is Crohn's disease?
  • What causes Crohn's disease?
  • Who is more likely to develop Crohn's disease?
  • What are the symptoms of Crohn's disease?
  • What other problems can Crohn's disease cause?
  • How is Crohn's disease diagnosed?
  • What are the treatments for Crohn's disease?

Read the full article at MedlinePlus

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

Convert K50.812 to ICD-9-CMHistory

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

ICD-9-CM
555.2 Reg enterit sm/lg intest
ApproximateCombination The match is approximate, and more than one code can be needed to describe the source diagnosis. Confirm with contextual judgment.
ICD-9-CM
560.9 Intestinal obstruct NOS
ApproximateCombination The match is approximate, and more than one code can be needed to describe the source diagnosis. Confirm with contextual judgment.

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 K50.812Overview

Is K50.812 a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report Crohn's disease of both small and large intestine with intestinal obstruction on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What MS-DRG does K50.812 group to?

When Crohn's disease of both small and large intestine with intestinal obstruction is the principal diagnosis on an inpatient stay, it groups to MS-DRG 385, 386, 387, with relative weights from 0.6813 to 1.5823 depending on complications. Higher weights mean higher Medicare reimbursement.

What is the ICD-9 equivalent of K50.812?

Under the General Equivalence Mappings, Crohn's disease of both small and large intestine with intestinal obstruction converts to ICD-9-CM 555.2 (reg enterit sm/lg intest) and 560.9 (intestinal obstruct NOS). The mapping is approximate, so confirm the match fits the documentation.

Footnotes

[1] Chronic - a chronic condition code indicates a condition lasting 12 months or longer and its effect on the patient based on one or both of the following criteria:

  • The condition results in the need for ongoing intervention with medical products,treatment, services, and special equipment
  • The condition places limitations on self-care, independent living, and social interactions.