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    v1.0.28
    OpenPayerBilling CodesOther diseases of the digestive systemICD-10-CM k91-intraoperative-and-postprocedural-complications
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    ICD-10-CM Code For Intraoperative And Postprocedural Complications Of Digestive System: Group Overview

    The International Classification of Diseases, Tenth Revision, Clinical Modification (ICD-10-CM) code group K91 includes conditions describing intraoperative and postprocedural complications and disorders of the digestive system not classified elsewhere, such as postprocedural infections, fistulas, obstruction, and malabsorption related to prior interventions. These ICD-10-CM diagnosis codes are used to document postoperative and procedure-related digestive complications, capturing clinical complexity, anatomic site, and timing relative to the procedure. Accurate coding within the ICD-10-CM K91 group supports proper claim adjudication and complete clinical documentation and appropriate reimbursement.

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    ICD-10-CM K91: Intraoperative And Postprocedural Complications And Disorders Of Digestive System, Not Elsewhere Classified Overview

    This group includes diagnoses for complications and disorders of the digestive system that arise during or after a procedure and are not classified elsewhere. It targets postoperative and intraoperative digestive tract complications, including anatomic or functional disturbances resulting from surgical or endoscopic interventions. Accurate coding is important to reflect clinical complexity and can affect reimbursement and quality reporting.

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    When to Use

    Use a code from this group when a patient develops a digestive system complication that is directly related to a prior procedure and no more specific category applies. Select the code that best specifies the type of complication, anatomic site, and whether the condition is acute or chronic as documented in the medical record.

    ICD-10-CM Codes

    24 rows

    ICD-10-CM CodeDescription
    K91.0Vomiting following gastrointestinal surgery
    K91.1Postgastric surgery syndromes
    K91.2Postsurgical malabsorption, not elsewhere classified
    K91.30Postprocedural intestinal obstruction, unspecified as to partial versus complete
    K91.31Postprocedural partial intestinal obstruction
    K91.32Postprocedural complete intestinal obstruction
    K91.5Postcholecystectomy syndrome
    K91.61Intraoperative hemorrhage and hematoma of a digestive system organ or structure complicating a digestive system procedure
    K91.62Intraoperative hemorrhage and hematoma of a digestive system organ or structure complicating other procedure
    K91.71Accidental puncture and laceration of a digestive system organ or structure during a digestive system procedure
    K91.72Accidental puncture and laceration of a digestive system organ or structure during other procedure
    K91.81Other intraoperative complications of digestive system
    K91.82Postprocedural hepatic failure
    K91.83Postprocedural hepatorenal syndrome
    K91.840Postprocedural hemorrhage of a digestive system organ or structure following a digestive system procedure
    K91.841Postprocedural hemorrhage of a digestive system organ or structure following other procedure
    K91.850Pouchitis
    K91.858Other complications of intestinal pouch
    K91.86Retained cholelithiasis following cholecystectomy
    K91.870Postprocedural hematoma of a digestive system organ or structure following a digestive system procedure

    Showing 1–20 of 24

    DRG Codes

    16 rows

    DRG CodeDescription
    388Gastrointestinal Obstruction with MCC
    389Gastrointestinal Obstruction with CC
    390Gastrointestinal Obstruction without CC/MCC
    391Esophagitis, Gastroenteritis and Miscellaneous Digestive Disorders with MCC
    392Esophagitis, Gastroenteritis and Miscellaneous Digestive Disorders without MCC
    393Other Digestive System Diagnoses with MCC
    394Other Digestive System Diagnoses with CC
    395Other Digestive System Diagnoses without CC/MCC
    444Disorders of the Biliary Tract with MCC
    445Disorders of the Biliary Tract with CC
    446Disorders of the Biliary Tract without CC/MCC
    791Prematurity with Major Problems
    793Full Term Neonate with Major Problems
    919Complications of Treatment with MCC
    920Complications of Treatment with CC
    921Complications of Treatment without CC/MCC

    Typical Clinical Scenarios

    • A middle-aged patient presents to the emergency department within days after a planned esophagectomy with fever, tachycardia, and mediastinal pain; imaging reveals contrast leak at the anastomosis with evidence of mediastinitis and sepsis from GI content extravasation. Because this is an acute postoperative gastrointestinal leak causing infection and systemic illness, a postprocedural complication code from this group is assigned to capture the operative-site complication and guide further management. Typical codes: K91.3, K91.31, K91.32
    • An adult with a history of Roux-en-Y gastric bypass several months ago reports progressive abdominal pain, nausea, and inability to tolerate oral intake; endoscopy demonstrates a marginal ulcer with chronic bleeding and scarring at the gastrojejunal anastomosis. This represents a late postprocedural complication of a bariatric surgery causing ongoing morbidity and need for medical or endoscopic therapy, so a code reflecting chronic postprocedural ulceration or stricture is used. Typical codes: K91.3, K91.31
    • An elderly patient undergoing emergent exploratory laparotomy for small bowel obstruction develops postoperative cholestasis with pruritus, elevated bilirubin and alkaline phosphatase, and no evidence of biliary obstruction on imaging; the clinical picture is consistent with postoperative cholestasis/functional hepatic disorder related to major abdominal surgery. A postprocedural hepatic dysfunction code from this group is assigned to document the intra- or postprocedural disorder of the digestive system complicating recovery. Typical codes: K91.2, K91.61

    Related Codes

    K90-INTESTINAL-MALABSORPTION

    ICD-10-CM Code For Intestinal Malabsorption: Group Overview

    K92-OTHER-DISEASES-OF-DIGESTIVE-SYSTEM

    ICD-10-CM Code For Other Diseases Of Digestive System: Group Overview

    K94-COMPLICATIONS-OF-DIGESTIVE-OPENINGS

    ICD-10-CM Code For Complications Of Artificial Openings Of The Digestive System: Group Overview

    K95-COMPLICATIONS-OF-BARIATRIC-PROCEDURES

    ICD-10-CM Code For Complications Of Bariatric Procedures: Group Overview

    Frequently Asked Questions

    References

    1. 1.CPT® Codes and Descriptions. AAPC. Retrieved Aug 11, 2026.Maintains the CPT code set's official descriptions and guidelines, licensed from the American Medical Association, used as the definitional source for CPT codes on this page.
    2. 2.HCPCS Quarterly Update. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's quarterly release of HCPCS Level II codes and short/long descriptors, the source for HCPCS code definitions and update history.
    3. 3.ICD-10-CM Full Code List. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's complete ICD-10-CM diagnosis code list, used to cross-reference diagnosis codes associated with this procedure or service.
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