2026 ICD-10-CM Diagnosis Code I97.120Postprocedural cardiac arrest following cardiac surgery
ICD-10-CM Codes›I00–I99›I95-I99›I97
- Billable — Valid for Submission
- CC — Complication or Comorbidity
- Not Chronic
I97.120 is a billable ICD-10-CM diagnosis code for postprocedural cardiac arrest following cardiac surgery. 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, 791, 793. As a secondary diagnosis, it counts as a complication or comorbidity (CC) and moves an inpatient stay to a higher severity level within its MS-DRG family. It does not count, however, when the principal diagnosis is one of 60 closely related codes. Coders also document this condition as cardiac arrest following cardiac surgery. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Cardiac arrest and ventricular fibrillation and Postprocedural or postoperative circulatory system complication.
Code Identity
Code Classification
Approximate SynonymsGuidance
Alternate terms and clinical phrases that map to this code.
- Cardiac arrest following cardiac surgery
- Postoperative cardiac arrhythmia
Index to Diseases and InjuriesGuidance
Alphabetical index entries that point to this code.
postprocedural See Also: Complications, surgical procedure;
cardiac arrest See Also: Infarct, myocardium, associated with revascularization procedure;
following cardiac surgery I97.120
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
Convert I97.120 to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About I97.120Overview
What is the ICD-10 code for postprocedural cardiac arrest following cardiac surgery?
The ICD-10-CM code for postprocedural cardiac arrest following cardiac surgery is I97.120 (sometimes written as I97120). It is billable on HIPAA-covered claims from October 1, 2025 through September 30, 2026.
Is I97.120 (Postprocedural cardiac arrest) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report postprocedural cardiac arrest following cardiac surgery on HIPAA-covered claims from October 1, 2025 through September 30, 2026.
What MS-DRG does I97.120 group to?
When postprocedural cardiac arrest following cardiac surgery is the principal diagnosis on an inpatient stay, it groups to MS-DRG 314, 315, 316, 791, 793, with relative weights from 0.6821 to 4.1696 depending on complications. Higher weights mean higher Medicare reimbursement.
Is I97.120 a CC or MCC?
CMS lists I97.120 as a CC (complication or comorbidity) for FY 2026. Reported as a secondary diagnosis, it moves the inpatient stay to a higher-weighted DRG within its severity family. It does not count when the principal diagnosis is one of the 60 closely related codes in its exclusion list.
What is the ICD-9 equivalent of I97.120?
Under the General Equivalence Mappings, postprocedural cardiac arrest following cardiac surgery converts to ICD-9-CM 429.4 (hrt dis postcardiac surg), 997.1 (surg compl-heart), and 429.4 (hrt dis postcardiac surg). The mapping is approximate, so confirm the match fits the documentation.
