2026 ICD-10-CM Diagnosis Code K91Intraoperative and postprocedural complications and disorders of digestive system, not elsewhere classified

ICD-10-CM Codes›K00–K95›K90-K95›K91

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

K91 is a non-billable ICD-10-CM category code for intraoperative and postprocedural complications and disorders of digestive system, not elsewhere classified, so it cannot be submitted on claims. Use a more specific code from this category instead, such as K91.0, K91.1, K91.2, and K91.30.

Code Identity

ICD-10-CM Code
K91
Billable Status
No — Non-Billable Category
Code Describes
Intraoperative and postprocedural complications and disorders of digestive system, not elsewhere classified
Chapter
K90-K95
Other diseases of the 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 CodeK91Intraoperative and postprocedural complications and disorders of digestive system, not elsewhere classified

Specific Coding for Intraop and postproc comp and disorders of dgstv sys, NECOverview

Non-specific codes like K91 require more characters. Use one of these billable codes instead:

  • Use K91.0 for Vomiting following gastrointestinal surgery

  • Use K91.1 for Postgastric surgery syndromes

  • Use K91.2 for Postsurgical malabsorption, not elsewhere classified

  • K91.3 for Postprocedural intestinal obstruction

  • Use K91.30 for Postprocedural intestinal obstruction, unspecified as to partial versus complete

  • Use K91.31 for Postprocedural partial intestinal obstruction

  • Use K91.32 for Postprocedural complete intestinal obstruction

  • Use K91.5 for Postcholecystectomy syndrome

  • K91.6 for Intraoperative hemorrhage and hematoma of a digestive system organ or structure complicating a procedure

  • Use K91.61 for Intraoperative hemorrhage and hematoma of a digestive system organ or structure complicating a digestive system procedure

  • Use K91.62 for Intraoperative hemorrhage and hematoma of a digestive system organ or structure complicating other procedure

  • K91.7 for Accidental puncture and laceration of a digestive system organ or structure during a procedure

  • Use K91.71 for Accidental puncture and laceration of a digestive system organ or structure during a digestive system procedure

  • Use K91.72 for Accidental puncture and laceration of a digestive system organ or structure during other procedure

  • K91.8 for Other intraoperative and postprocedural complications and disorders of digestive system

  • Use K91.81 for Other intraoperative complications of digestive system

  • Use K91.82 for Postprocedural hepatic failure

  • Use K91.83 for Postprocedural hepatorenal syndrome

  • K91.84 for Postprocedural hemorrhage of a digestive system organ or structure following a procedure

  • K91.85 for Complications of intestinal pouch

  • Use K91.86 for Retained cholelithiasis following cholecystectomy

  • K91.87 for Postprocedural hematoma and seroma of a digestive system organ or structure following a procedure

  • Use K91.89 for Other postprocedural complications and disorders of digestive system

Tabular List NotesGuidance

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

Type 2 Excludes

  • complications of artificial opening of digestive system K94
  • complications of bariatric procedures K95
  • gastrojejunal ulcer K28
  • postprocedural radiation retroperitoneal abscess K68.11
  • radiation colitis K52.0
  • radiation gastroenteritis K52.0
  • radiation proctitis K62.7

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.

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 K91Overview

Is K91 a billable code?

No. This is a category header that groups the codes for intraoperative and postprocedural complications and disorders of digestive system, not elsewhere classified, and headers cannot be submitted on claims. Claims for intraoperative and postprocedural complications and disorders of digestive system, not elsewhere classified need a more specific code from this category, such as K91.0, K91.1, and K91.2.