Intraoperative and postprocedural complications and disorders of digestive system, not elsewhere classified (K91) ICD-10-CM
The K91 code range covers intraoperative and postprocedural complications and disorders of digestive system, not elsewhere classified with 32 ICD-10-CM diagnosis codes. 24 of them are billable and valid for claim submission in fiscal year 2027, and the category headers group them but cannot themselves be billed.
Type 2 Excludes
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.
Codes in the K91 Range 32 codes · 24 billable
- K91 Intraoperative and postprocedural complications and disorders of digestive system, not elsewhere classifiedNon-billable
- K91.0 Vomiting following gastrointestinal surgery
- K91.1 Postgastric surgery syndromes
- K91.2 Postsurgical malabsorption, not elsewhere classified
- K91.3 Postprocedural intestinal obstructionNon-billable
- K91.30 Postprocedural intestinal obstruction, unspecified as to partial versus complete
- K91.31 Postprocedural partial intestinal obstruction
- K91.32 Postprocedural complete intestinal obstruction
- K91.5 Postcholecystectomy syndrome
- K91.6 Intraoperative hemorrhage and hematoma of a digestive system organ or structure complicating a procedureNon-billable
- K91.61 Intraoperative hemorrhage and hematoma of a digestive system organ or structure complicating a digestive system procedure
- K91.62 Intraoperative hemorrhage and hematoma of a digestive system organ or structure complicating other procedure
- K91.7 Accidental puncture and laceration of a digestive system organ or structure during a procedureNon-billable
- K91.71 Accidental puncture and laceration of a digestive system organ or structure during a digestive system procedure
- K91.72 Accidental puncture and laceration of a digestive system organ or structure during other procedure
- K91.8 Other intraoperative and postprocedural complications and disorders of digestive systemNon-billable
- K91.81 Other intraoperative complications of digestive system
- K91.82 Postprocedural hepatic failure
- K91.83 Postprocedural hepatorenal syndrome
- K91.84 Postprocedural hemorrhage of a digestive system organ or structure following a procedureNon-billable
- K91.840 Postprocedural hemorrhage of a digestive system organ or structure following a digestive system procedure
- K91.841 Postprocedural hemorrhage of a digestive system organ or structure following other procedure
- K91.85 Complications of intestinal pouchNon-billable
- K91.850 Pouchitis
- K91.858 Other complications of intestinal pouch
- K91.86 Retained cholelithiasis following cholecystectomy
- K91.87 Postprocedural hematoma and seroma of a digestive system organ or structure following a procedureNon-billable
- K91.870 Postprocedural hematoma of a digestive system organ or structure following a digestive system procedure
- K91.871 Postprocedural hematoma of a digestive system organ or structure following other procedure
- K91.872 Postprocedural seroma of a digestive system organ or structure following a digestive system procedure
- K91.873 Postprocedural seroma of a digestive system organ or structure following other procedure
- K91.89 Other postprocedural complications and disorders of digestive system
Clinical Terms in This Code Range
Definitions from the National Library of Medicine for conditions coded in the K91 range.
Dumping Syndrome
Gastrointestinal symptoms resulting from an absent or nonfunctioning pylorus.
Postcholecystectomy Syndrome
Abdominal symptoms after removal of the GALLBLADDER. The common postoperative symptoms are often the same as those present before the operation, such as COLIC, bloating, NAUSEA, and VOMITING. There is pain on palpation of the right upper quadrant and sometimes JAUNDICE. The term is often used, inaccurately, to describe such postoperative symptoms not due to gallbladder removal.
Pouchitis
Acute INFLAMMATION in the INTESTINAL MUCOSA of the continent ileal reservoir (or pouch) in patients who have undergone ILEOSTOMY and restorative proctocolectomy (PROCTOCOLECTOMY, RESTORATIVE).
About the K91 Code Range
These conditions affect the digestive system during a procedure or afterward. They include vomiting after gastrointestinal surgery, poor absorption after surgery, intestinal blockage, bleeding, and accidental injury.
Within K91, subdivisions separate conditions after stomach or gallbladder surgery from intestinal obstruction and complications during a procedure. K91.3 distinguishes partial from complete intestinal obstruction. K91.6 covers bleeding or a blood collection during a procedure; K91.7 covers accidental puncture or tearing. Both distinguish digestive system procedures from other procedures.
K91.8 groups other complications, including liver failure, intestinal pouch complications, retained gallstones, and bleeding or blood and fluid collections afterward. Its bleeding and collection subdivisions also distinguish digestive system procedures from other procedures.
Questions About This Page
How many billable codes are in the K91 range?
Of the 32 codes in this range, 24 are billable and valid for claim submission from October 1, 2026 through September 30, 2027. Category header codes group them but cannot be reported on claims.
What does the K91 range classify?
The range classifies intraoperative and postprocedural complications and disorders of digestive system, not elsewhere classified. Each code links to its own reference page with billing status, MS-DRG grouping, coding notes, and clinical information.
Related References
Source: CMS FY 2027 ICD-10-CM Tabular List and order file, effective October 1, 2026 through September 30, 2027.
