2026 ICD-10-CM Diagnosis Code I97.0Postcardiotomy syndrome

ICD-10-CM Codes›I00–I99›I95-I99›I97

ICD-10-CM I97.0
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

I97.0 is a billable ICD-10-CM diagnosis code for postcardiotomy syndrome. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 314 through 316. Coders also document this condition as cardiac insufficiency during AND/OR resulting from a procedure. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Postprocedural or postoperative circulatory system complication.

Code Identity

ICD-10-CM Code
I97.0
Billable Status
Yes — Valid for Submission
Code Describes
Postcardiotomy syndrome
Short Description
Postcardiotomy syndrome
Same as the full description in the CMS dataset.
Parent Code
I97
Intraoperative and postprocedural complications and disorders of circulatory system, not elsewhere classified

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 CodeI97.0Postcardiotomy syndrome

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Cardiac insufficiency during AND/OR resulting from a procedure
  • Cardiac insufficiency following cardiac surgery
  • Post-cardiac injury syndrome
  • Postpericardiotomy pericarditis
  • Post-pericardiotomy syndrome
  • Postvalvulotomy syndrome

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)
      • circulatory system
        • postprocedural
          • following cardiac surgery
            • postcardiotomy syndrome
    • Complication(s) (from) (of)
      • circulatory system
        • postprocedural
          • postcardiotomy syndrome
    • Complication(s) (from) (of)
      • surgical procedure (on)
        • postcardiotomy syndrome
    • Complication(s) (from) (of)
      • surgical procedure (on)
        • postcommissurotomy syndrome
    • Complication(s) (from) (of)
      • surgical procedure (on)
        • postvalvulotomy syndrome
    • Injury
      • postcardiac surgery (syndrome)
    • Postcardiotomy syndrome
    • Postcommissurotomy syndrome
    • Postvalvulotomy syndrome
    • Syndrome
      • Dressler's (postmyocardial infarction)
        • postcardiotomy
    • Syndrome
      • postcardiac injury
        • postcardiotomy
    • Syndrome
      • postcardiotomy
    • Syndrome
      • postcommissurotomy
    • Syndrome
      • postvalvulotomy

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 I97.0 to ICD-9-CMHistory

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

ICD-9-CM
429.4 Hrt dis postcardiac surg
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 I97.0Overview

Is I97.0 a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report postcardiotomy syndrome on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What MS-DRG does I97.0 group to?

When postcardiotomy syndrome is the principal diagnosis on an inpatient stay, it groups to MS-DRG 314, 315, 316, with relative weights from 0.6821 to 2.0852 depending on complications. Higher weights mean higher Medicare reimbursement.

What is the ICD-9 equivalent of I97.0?

Under the General Equivalence Mappings, postcardiotomy syndrome converts to ICD-9-CM 429.4 (hrt dis postcardiac surg). 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.