2026 ICD-10-CM Diagnosis Code K91.81Other intraoperative complications of digestive system

ICD-10-CM Codes›K00–K95›K90-K95›K91

ICD-10-CM K91.81
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

K91.81 is a billable ICD-10-CM diagnosis code for other intraoperative complications of digestive system. 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. Coders also document this condition as accidental injury of intestine during surgical procedure. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Postprocedural or postoperative digestive system complication.

Code Identity

ICD-10-CM Code
K91.81
Billable Status
Yes — Valid for Submission
Code Describes
Other intraoperative complications of digestive system
Short Description
Other intraoperative complications of digestive system
Same as the full description in the CMS dataset.
Parent Code
K91.8
Other intraoperative and postprocedural complications and disorders of digestive system

Code Classification

ChapterK00–K95Diseases of the digestive system
SectionK90-K95Other diseases of the digestive system
CategoryK91Intraoperative and postprocedural complications and disorders of digestive system, not elsewhere classified
This CodeK91.81Other intraoperative complications of digestive system

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Accidental injury of intestine during surgical procedure
  • Injury of gallbladder during surgery
  • Injury to intestine during surgery
  • Injury to rectum during surgery
  • Injury to viscus during surgery

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.

    • Complication(s) (from) (of)
      • intraoperative (intraprocedural)
        • specified NEC
          • digestive system

Clinical ClassificationClinical

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

CCSR DIG024
Postprocedural or postoperative digestive system complication
Default principal diagnosis: inpatient Yes · outpatient Yes

Patient EducationClinical

Digestive Diseases

When you eat, your body breaks food down to a form it can use to build and nourish cells and provide energy. This process is called digestion.

Read the full article at MedlinePlus

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

Convert K91.81 to ICD-9-CMHistory

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

ICD-9-CM
997.49 Oth digestv system comp
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 K91.81Overview

Is K91.81 a billable code?

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

What MS-DRG does K91.81 group to?

When other intraoperative complications of digestive system 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 K91.81?

Under the General Equivalence Mappings, other intraoperative complications of digestive system converts to ICD-9-CM 997.49 (oth digestv system comp). 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.