2026 ICD-10-CM Diagnosis Code I97.631Postprocedural hematoma of a circulatory system organ or structure following cardiac bypass

ICD-10-CM Codes›I00–I99›I95-I99›I97

ICD-10-CM I97.631
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

I97.631 is a billable ICD-10-CM diagnosis code for postprocedural hematoma of a circulatory system organ or structure following cardiac bypass. 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 circulatory system complication.

Code Identity

ICD-10-CM Code
I97.631
Billable Status
Yes — Valid for Submission
Code Describes
Postprocedural hematoma of a circulatory system organ or structure following cardiac bypass
Short Description
Postproc hematoma of a circ sys org following cardiac bypass
Parent Code
I97.63
Postprocedural hematoma of a circulatory system organ or structure following a circulatory system procedure

Code Classification

ChapterI00–I99Diseases of the circulatory system
SectionI95-I99Other and unspecified disorders of the circulatory system
CategoryI97Intraoperative and postprocedural complications and disorders of circulatory system, not elsewhere classified
This CodeI97.631Postprocedural hematoma of a circulatory system organ or structure following cardiac bypass

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
        • hematoma (of)
          • circulatory system organ or structure
            • following cardiac bypass

Clinical ClassificationClinical

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

CCSR CIR038
Postprocedural or postoperative circulatory system complication
Default principal diagnosis: inpatient Yes · outpatient Yes

Convert I97.631 to ICD-9-CMHistory

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

ICD-9-CM
998.12 Hematoma complic proc
Approximate The match is approximate rather than exact.

Code History & ChangesHistory

Replacement I97.631 replaces the following previously assigned code(s):

  • I97.611 - Postproc hemor of a circ sys org following cardiac bypass
  • I97.611 - Postproc hemor/hemtom of a circ sys org fol cardiac bypass
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 I97.631Overview

Is I97.631 a billable code?

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

What MS-DRG does I97.631 group to?

When postprocedural hematoma of a circulatory system organ or structure following cardiac bypass 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 I97.631?

Under the General Equivalence Mappings, postprocedural hematoma of a circulatory system organ or structure following cardiac bypass converts to ICD-9-CM 998.12 (hematoma 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.