2027 ICD-10-CM Diagnosis Code T81.12XSPostprocedural septic shock, sequela

ICD-10-CM Codes›S00–T88›T80-T88›T81

ICD-10-CM T81.12XS
CMSSource: CMS FY 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

T81.12XS is a billable ICD-10-CM diagnosis code for postprocedural septic shock, sequela. The 7th character S marks it as a sequela code, which reports a problem that remains after the original condition has resolved. It is valid on HIPAA claims for fiscal year 2027 (October 1, 2026 through September 30, 2027) and groups to MS-DRG 922 through 923. The code is not accepted as a principal diagnosis by the Medicare Code Editor and exempt from POA reporting. Coders also document this condition as endotoxic shock. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Complication, sequela.

Code Identity

ICD-10-CM Code
T81.12XS
Billable Status
Yes — Valid for Submission
Code Describes
Postprocedural septic shock, sequela
Short Description
Postprocedural septic shock, sequela
Same as the full description in the CMS dataset.
Parent Code
T81.12
Postprocedural septic 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 CodeT81.12XSPostprocedural septic shock, sequela

Code EditsBilling

Medicare Code Editor checks that affect claim validity for T81.12XS.

Unacceptable principal diagnosis
There are selected codes that describe a circumstance which influences an individual's health status but not a current illness or injury, or codes that are not specific manifestations but may be due to an underlying cause. These codes are considered unacceptable as a principal diagnosis.

Present on Admission (POA)Billing

T81.12XS is exempt from POA reporting on inpatient claims to general acute care hospitals. Review the other POA exempt codes in Complications of surgical and medical care, not elsewhere classified (T80-T88).

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Endotoxic shock
  • Postoperative endotoxic shock
  • Postoperative sepsis
  • Postoperative septic shock
  • Postoperative shock
  • Postprocedural septic shock

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 2027, published by CMS and the National Center for Health Statistics.

Instructional NotesGuidance

Instructions from the official ICD-10-CM Tabular List that apply to T81.12XS: its own notes plus those printed at T81.12, T81.1, T81, block T80-T88, and Chapter 19. A note printed at a category, block or chapter applies to every code under it.

Excludes1

Not coded here: the excluded code is never reported together with this one, unless the two conditions are unrelated.

From T81.1 Postprocedural shock applies to 12 codes
  • anaphylactic shock NOS (T78.2)
  • anaphylactic shock due to correct substance properly administered (T88.6)
  • anaphylactic shock due to serum (T80.5-)
  • electric shock (T75.4)
  • obstetric shock (O75.1)
  • shock due to anesthesia (T88.2)
  • shock following abortion or ectopic or molar pregnancy (O00-O07, O08.3)
  • traumatic shock (T79.4)

Excludes2

Not included here: the excluded condition is not part of this code, but a patient may have both, so both codes may be reported.

From T81 Complications of procedures, not elsewhere classified applies to 240 codes
From Block T80-T88 Complications of surgical and medical care, not elsewhere classified applies to 1,683 codes
  • any encounters with medical care for postprocedural conditions in which no complications are present, such as:
  • artificial opening status (Z93.-)
  • closure of external stoma (Z43.-)
  • fitting and adjustment of external prosthetic device (Z44.-)
  • burns and corrosions from local applications and irradiation (T20-T32)
  • complications of surgical procedures during pregnancy, childbirth and the puerperium (O00-O9A)
  • mechanical complication of respirator [ventilator] (J95.850)
  • poisoning and toxic effects of drugs and chemicals (T36-T65 with fifth or sixth character 1-4 or 6)
  • postprocedural fever (R50.82)
  • specified complications classified elsewhere, such as:
  • cerebrospinal fluid leak from spinal puncture (G97.0)
  • colostomy malfunction (K94.0-)
  • disorders of fluid and electrolyte imbalance (E86-E87)
  • functional disturbances following cardiac surgery (I97.0-I97.1)
  • intraoperative and postprocedural complications of specified body systems (D78.-, E36.-, E89.-, G97.3-, G97.4, H59.3-, H59.-, H95.2-, H95.3, I97.4-, I97.5, J95.6-, J95.7, K91.6-, L76.-, M96.-, N99.-)
  • ostomy complications (J95.0-, K94.-, N99.5-)
  • postgastric surgery syndromes (K91.1)
  • postlaminectomy syndrome NEC (M96.1)
  • postmastectomy lymphedema syndrome (I97.2)
  • postsurgical blind-loop syndrome (K91.2)
  • ventilator associated pneumonia (J95.851)
From Chapter 19 (S00-T88) Injury, poisoning and certain other consequences of external causes applies to 41,187 codes

Code First

The underlying condition named in the note is sequenced before this code.

From T81.12 Postprocedural septic shock applies to 3 codes
  • underlying infection

Use Additional Code

Add a second code, after this one, to fully describe the condition.

From T81.12 Postprocedural septic shock applies to 3 codes
  • code, to identify any associated acute organ dysfunction, if applicable
From T81 Complications of procedures, not elsewhere classified applies to 240 codes
  • code for adverse effect, if applicable, to identify drug (T36-T50 with fifth or sixth character 5)
From Block T80-T88 Complications of surgical and medical care, not elsewhere classified applies to 1,683 codes
  • code for adverse effect, if applicable, to identify drug (T36-T50 with fifth or sixth character 5)
  • code(s) to identify the specified condition resulting from the complication
  • code to identify devices involved and details of circumstances (Y62-Y82)
From Chapter 19 (S00-T88) Injury, poisoning and certain other consequences of external causes applies to 41,187 codes
  • code to identify any retained foreign body, if applicable (Z18.-)

Notes

General instructions on how these codes are used.

From Chapter 19 (S00-T88) Injury, poisoning and certain other consequences of external causes applies to 41,187 codes
  • Use secondary code(s) from Chapter 20, External causes of morbidity, to indicate cause of injury. Codes within the T section that include the external cause do not require an additional external cause code
  • The chapter uses the S-section for coding different types of injuries related to single body regions and the T-section to cover injuries to unspecified body regions as well as poisoning and certain other consequences of external causes.

7th Character

Every code in the category takes a 7th character from the listed values, with the placeholder X filling any empty positions before it.

From T81 Complications of procedures, not elsewhere classified applies to 240 codes
  • The appropriate 7th character is to be added to each code from category T81
Values for category T81 Encounter: Initial, Subsequent, Sequela
  • Ainitial encounter
  • Dsubsequent encounter
  • Ssequela this code

Source: CMS ICD-10-CM Tabular List. How to read instructional notes.

Referenced in Other NotesGuidance

Instructional notes printed at other codes that name T81.12XS, its category, or a range that includes it.

Excludes1 5

These codes carry an Excludes1 note naming T81.12XS: they are not reported together with it, unless the two conditions are unrelated.

  • R55 Syncope and collapse
    postprocedural shock (T81.1-) names T81.1-, which includes this code
  • R57 Shock, not elsewhere classified
    postprocedural shock (T81.1-) names T81.1-, which includes this code
  • R65.21 Severe sepsis with septic shock
    postprocedural septic shock (T81.12-) names T81.12-, which includes this code
  • T79.4 Traumatic shock
    postprocedural shock (T81.1-) names T81.1-, which includes this code
  • T88.2 Shock due to anesthesia
    postprocedural shock NOS (T81.1-) names T81.1-, which includes this code

Excludes2 2

These codes carry an Excludes2 note naming T81.12XS: its condition is not part of those codes, and both may be reported when the patient has both.

  • I97 Intraoperative and postprocedural complications and disorders of circulatory system, not elsewhere classified
    postprocedural shock (T81.1-) names T81.1-, which includes this code
  • T88 Other complications of surgical and medical care, not elsewhere classified
    complication following procedure NEC (T81.-) names T81.-, which includes this code

Code First 1

These codes say to code first a condition named in the note, and T81.12XS is one of the conditions named.

  • J98.51 Mediastinitis
    underlying condition, if applicable, such as postoperative mediastinitis (T81.-) names T81.-, which includes this code

Clinical ClassificationClinical

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

CCSR INJ076
Complication, sequela
Default principal diagnosis: inpatient No · outpatient Yes

Convert T81.12XS to ICD-9-CMHistory

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

ICD-9-CM
909.3 Late eff surg/med compl
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 2017–2026No changes
FY 2027CurrentCurrent code set, no changesEffective October 1, 2026 through September 30, 2027.

Questions About T81.12XSOverview

What is the ICD-10 code for postprocedural septic shock, sequela?

The ICD-10-CM code for postprocedural septic shock, sequela is T81.12XS (sometimes written as T8112XS). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

Is T81.12XS (Postprocedural septic shock) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report postprocedural septic shock, sequela on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

What does the 7th character S in T81.12XS mean?

The final character S makes this a sequela code: it reports a lingering problem that remains after the postprocedural septic shock itself has resolved, not the original event.

What MS-DRG does T81.12XS group to?

On inpatient claims, postprocedural septic shock, sequela maps to MS-DRG 923, 922, with relative weights from 0.9980 to 1.6248 depending on complications. Higher weights mean higher Medicare reimbursement.

Can T81.12XS be a principal diagnosis?

No. The Medicare Code Editor rejects this code as a principal diagnosis because postprocedural septic shock, sequela describes a circumstance that influences health status rather than a current illness. Report it as a secondary diagnosis.