2026 ICD-10-CM Diagnosis Code K91.873Postprocedural seroma of a digestive system organ or structure following other procedure

ICD-10-CM Codes›K00–K95›K90-K95›K91

ICD-10-CM K91.873
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

K91.873 is a billable ICD-10-CM diagnosis code for postprocedural seroma of a digestive system organ or structure following other 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
K91.873
Billable Status
Yes — Valid for Submission
Code Describes
Postprocedural seroma of a digestive system organ or structure following other procedure
Short Description
Postproc seroma of a dgstv sys org following other procedure
Parent Code
K91.87
Postprocedural hematoma and seroma 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 CodeK91.873Postprocedural seroma of a digestive system organ or structure following other procedure

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)
      • postprocedural
        • seroma (of)
          • digestive system
            • following procedure on other organ

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

Convert K91.873 to ICD-9-CMHistory

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

ICD-9-CM
998.13 Seroma complicting proc
Approximate The match is approximate rather than exact.

Code History & ChangesHistory

Replacement K91.873 replaces the following previously assigned code(s):

  • K91.841 - Postproc hemor of a dgstv sys org following other procedure
  • K91.841 - Postproc hemor/hemtom of a dgstv sys org fol oth procedure
FY 2018AddedAdded to the ICD-10-CM code setEffective October 1, 2017.
FY 2019–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About K91.873Overview

Is K91.873 a billable code?

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

What MS-DRG does K91.873 group to?

When postprocedural seroma of a digestive system organ or structure following other 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 K91.873?

Under the General Equivalence Mappings, postprocedural seroma of a digestive system organ or structure following other procedure converts to ICD-9-CM 998.13 (seroma complicting 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.