2026 ICD-10-CM Diagnosis Code K91.840Postprocedural hemorrhage of a digestive system organ or structure following a digestive system procedure

ICD-10-CM Codes›K00–K95›K90-K95›K91

ICD-10-CM K91.840
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

K91.840 is a billable ICD-10-CM diagnosis code for postprocedural hemorrhage of a digestive system organ or structure following a digestive system procedure. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 919 through 921. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Postprocedural or postoperative digestive system complication.

Code Identity

ICD-10-CM Code
K91.840
Billable Status
Yes — Valid for Submission
Code Describes
Postprocedural hemorrhage of a digestive system organ or structure following a digestive system procedure
Short Description
Postproc hemor of a dgstv sys org fol a dgstv sys procedure
Parent Code
K91.84
Postprocedural hemorrhage of a digestive system organ or structure following a procedure

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 CodeK91.840Postprocedural hemorrhage of a digestive system organ or structure following a digestive system procedure

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Bleeding following tonsillectomy
  • Esophageal anastomotic hemorrhage
  • Gastric anastomotic hemorrhage
  • Gastrointestinal anastomotic hemorrhage
  • Jejunal anastomotic hemorrhage
  • Primary post tonsillectomy hemorrhage
  • Secondary hemorrhage
  • Secondary hemorrhage postprocedure
  • Secondary post tonsillectomy hemorrhage
  • Small intestine anastomotic hemorrhage

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.

    • Bleeding
      • tooth socket (post-extraction)
    • Complication(s) (from) (of)
      • postprocedural
        • hemorrhage (of)
          • digestive system
            • following procedure on 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

After Surgery

After any operation, you'll have some side effects. There is usually some pain with surgery. There may also be swelling and soreness around the area that the surgeon cut. Your surgeon can tell you which side effects to expect.

Read the full article at MedlinePlus

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

Convert K91.840 to ICD-9-CMHistory

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

ICD-9-CM
998.11 Hemorrhage complic proc
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 K91.840Overview

Is K91.840 a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report postprocedural hemorrhage of a digestive system organ or structure following a digestive system procedure on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What MS-DRG does K91.840 group to?

When postprocedural hemorrhage of a digestive system organ or structure following a digestive system procedure is the principal diagnosis on an inpatient stay, it groups to MS-DRG 919, 920, 921, with relative weights from 0.6884 to 1.8308 depending on complications. Higher weights mean higher Medicare reimbursement.

What is the ICD-9 equivalent of K91.840?

Under the General Equivalence Mappings, postprocedural hemorrhage of a digestive system organ or structure following a digestive system procedure converts to ICD-9-CM 998.11 (hemorrhage complic proc). 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.