I97.121 – Postprocedural cardiac arrest following other surgery

ICD-10-CM 2027 diagnosis code · Other and unspecified disorders of the circulatory system

Billable code

ICD-10-CM code I97.121

Code: I97.121 (claims format: I97121)
Description: Postprocedural cardiac arrest following other surgery
Billable: Yes – valid for HIPAA-covered transactions
Valid for: Dates of service October 1, 2026 – September 30, 2027 (FY2027)
Chapter: 9. Diseases of the circulatory system (I00-I99)
Block: I95-I99 Other and unspecified disorders of the circulatory system
Parent codes: I97 › I97.1 › I97.12

Notes inherited from parent codes

Instructional notes at a category or block level apply to every code below it.

I97 – Intraoperative and postprocedural complications and disorders of circulatory system, not elsewhere classified

Excludes2 (not included here):

postprocedural shock (T81.1-)

I97.1 – Other postprocedural cardiac functional disturbances

Excludes2 (not included here):

acute pulmonary insufficiency following thoracic surgery (J95.1)
intraoperative cardiac functional disturbances (I97.7-)

Index terms for I97.121

Entries in the ICD-10-CM alphabetic index that lead to this code:

Complication, postprocedural, cardiac arrest, following other surgery

Related codes in I97.12

I97.120 – Postprocedural cardiac arrest following cardiac surgeryBillable

Frequently asked questions

What is ICD-10 code I97.121?

I97.121 is the ICD-10-CM code for postprocedural cardiac arrest following other surgery, in the block I95-I99 (Other and unspecified disorders of the circulatory system).

Is I97.121 a billable code?

Yes. I97.121 is a billable/specific code that can be used to indicate a diagnosis for reimbursement purposes.

What category does I97.121 belong to?

It belongs to category I97 – Intraoperative and postprocedural complications and disorders of circulatory system, not elsewhere classified.

Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.