2026 ICD-10-CM Diagnosis Code N99.821Postprocedural hemorrhage of a genitourinary system organ or structure following other procedure

ICD-10-CM Codes›N00–N99›N99›N99

ICD-10-CM N99.821
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

N99.821 is a billable ICD-10-CM diagnosis code for postprocedural hemorrhage of a genitourinary 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. Coders also document this condition as abnormal uterine bleeding unrelated to menstrual cycle. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Postprocedural or postoperative genitourinary system complication.

Code Identity

ICD-10-CM Code
N99.821
Billable Status
Yes — Valid for Submission
Code Describes
Postprocedural hemorrhage of a genitourinary system organ or structure following other procedure
Short Description
Postproc hemor of a GU sys org following other procedure
Parent Code
N99.82
Postprocedural hemorrhage of a genitourinary system organ or structure following a procedure

Code Classification

ChapterN00–N99Diseases of the genitourinary system
SectionN99Intraoperative and postprocedural complications and disorders of genitourinary system, not elsewhere classified
CategoryN99Intraoperative and postprocedural complications and disorders of genitourinary system, not elsewhere classified
This CodeN99.821Postprocedural hemorrhage of a genitourinary system organ or structure following other procedure

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Abnormal uterine bleeding unrelated to menstrual cycle
  • Hematoma of vaginal vault following surgical procedure
  • Nonmenstrual uterine bleeding following procedure
  • Postoperative hematoma of female pelvis
  • Vaginal hematoma
  • Vaginal vault bleeding
  • Vaginal vault hematoma

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
        • hemorrhage (of)
          • genitourinary organ or structure
            • following procedure on other organ

Clinical ClassificationClinical

AHRQ’s CCSR groups this code into broader clinical categories.

CCSR GEN026
Postprocedural or postoperative genitourinary system complication
Default principal diagnosis: inpatient Yes · outpatient Yes

Convert N99.821 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 N99.821Overview

Is N99.821 a billable code?

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

What MS-DRG does N99.821 group to?

When postprocedural hemorrhage of a genitourinary 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 N99.821?

Under the General Equivalence Mappings, postprocedural hemorrhage of a genitourinary system organ or structure following other 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.