2026 ICD-10-CM Diagnosis Code T81.11XAPostprocedural cardiogenic shock, initial encounter

ICD-10-CM Codes›S00–T88›T80-T88›T81

ICD-10-CM T81.11XA
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

T81.11XA is a billable ICD-10-CM diagnosis code for postprocedural cardiogenic shock, initial encounter. The 7th character A marks it as an initial encounter code, used while the patient is receiving active treatment. 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 cardiogenic shock. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Complication of other surgical or medical care, injury, initial encounter; and Shock.

Code Identity

ICD-10-CM Code
T81.11XA
Billable Status
Yes — Valid for Submission
Code Describes
Postprocedural cardiogenic shock, initial encounter
Short Description
Postprocedural cardiogenic shock, initial encounter
Same as the full description in the CMS dataset.
Parent Code
T81.11
Postprocedural cardiogenic shock

Code Classification

ChapterS00–T88Injury, poisoning and certain other consequences of external causes
SectionT80-T88Complications of surgical and medical care, not elsewhere classified
CategoryT81Complications of procedures, not elsewhere classified
This CodeT81.11XAPostprocedural cardiogenic shock, initial encounter

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Cardiogenic shock
  • Cardiogenic shock following procedure
  • Disease affecting entire cardiovascular system

Coding GuidelinesGuidance

The appropriate 7th character is to be added to each code from block Complications of procedures, not elsewhere classified (T81). Use the following options for the applicable episode of care:

  • A - initial encounter
  • D - subsequent encounter
  • S - sequela

Source: ICD-10-CM Official Guidelines for Coding and Reporting, FY 2026, published by CMS and the National Center for Health Statistics.

Clinical ClassificationClinical

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

CCSR INJ037
Complication of other surgical or medical care, injury, initial encounter
Default principal diagnosis: inpatient Yes · outpatient Yes
CCSR SYM003
Shock
Default principal diagnosis: inpatient No · outpatient No

Convert T81.11XA to ICD-9-CMHistory

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

ICD-9-CM
998.01 Postop shock,cardiogenic
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 T81.11XAOverview

Is T81.11XA (Postprocedural cardiogenic shock) a billable code?

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

What does the 7th character A in T81.11XA mean?

The final character A marks the initial encounter: use it while the patient is receiving active treatment for postprocedural cardiogenic shock, such as an emergency visit or first evaluation.

What MS-DRG does T81.11XA group to?

When postprocedural cardiogenic shock, initial encounter 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 T81.11XA?

Under the General Equivalence Mappings, postprocedural cardiogenic shock, initial encounter converts to ICD-9-CM 998.01 (postop shock,cardiogenic). 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.