2026 ICD-10-CM Diagnosis Code T71.191SAsphyxiation due to mechanical threat to breathing due to other causes, accidental, sequela

ICD-10-CM Codes›S00–T88›T66-T78›T71

ICD-10-CM T71.191S
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

T71.191S is a billable ICD-10-CM diagnosis code for asphyxiation due to mechanical threat to breathing due to other causes, accidental, 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 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 922 through 923. The code is exempt from POA reporting. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Effect of other external causes, sequela.

Code Identity

ICD-10-CM Code
T71.191S
Billable Status
Yes — Valid for Submission
Code Describes
Asphyxiation due to mechanical threat to breathing due to other causes, accidental, sequela
Short Description
Asphyx d/t mech threat to breathe d/t oth cause, acc, sqla
Parent Code
T71.191
Asphyxiation due to mechanical threat to breathing due to other causes, accidental

Code Classification

ChapterS00–T88Injury, poisoning and certain other consequences of external causes
SectionT66-T78Other and unspecified effects of external causes
CategoryT71Asphyxiation
This CodeT71.191SAsphyxiation due to mechanical threat to breathing due to other causes, accidental, sequela

Present on Admission (POA)Billing

T71.191S is exempt from POA reporting on inpatient claims to general acute care hospitals. Review other POA exempt codes.

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Accidental asphyxia
  • Accidental mechanical suffocation
  • Accidental mechanical suffocation by collapsing building
  • Accidental mechanical suffocation by falling material
  • Accidental mechanical suffocation by snow or ice
  • Accidental mechanical suffocation by stored powder or grain
  • Accidental mechanical suffocation due to lack of air in closed space
  • Accidental strangulation
  • Accidental strangulation by clothing
  • Accidental strangulation by clothing in fall
  • Accidental strangulation by electric car window
  • Accidental strangulation by machinery
  • Accidental strangulation on clothing caught in machinery
  • Asphyxia by bedclothes or pillow
  • Asphyxia by burial under powder or solid matter
  • Asphyxia by circumferential chest wall burns
  • Asphyxia by circumferential chest wall tumor
  • Asphyxia by entrapment of chest
  • Asphyxia by entrapment with mouth and nose blocked
  • Asphyxia by gag
  • Asphyxia by obstruction of mouth and nose
  • Asphyxiation by sustained compression of chest
  • Death by asphyxiation
  • Death by strangulation
  • Hypoxic ischemic encephalopathy
  • Hypoxic ischemic encephalopathy due to strangulation
  • Mechanical asphyxia accident
  • Suffocation by mechanical cause
  • Suffocation by pressure

Coding GuidelinesGuidance

The appropriate 7th character is to be added to each code from block Asphyxiation (T71). 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 INJ074
Effect of other external causes, sequela
Default principal diagnosis: inpatient Yes · outpatient Yes

Convert T71.191S to ICD-9-CMHistory

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

ICD-9-CM
909.4 Late eff cert ext cause
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 T71.191SOverview

Is T71.191S a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report asphyxiation due to mechanical threat to breathing due to other causes, accidental, sequela on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What does the 7th character S in T71.191S mean?

The final character S makes this a sequela code: it reports a lingering problem that remains after the asphyxiation due to mechanical threat to breathing due to other causes, accidental itself has resolved, not the original event.

What MS-DRG does T71.191S group to?

When asphyxiation due to mechanical threat to breathing due to other causes, accidental, sequela is the principal diagnosis on an inpatient stay, it groups to MS-DRG 922, 923, with relative weights from 1.0177 to 1.7494 depending on complications. Higher weights mean higher Medicare reimbursement.

Is T71.191S exempt from POA reporting?

Yes. CMS lists this code among those exempt from present on admission reporting, so hospitals do not assign a POA indicator for asphyxiation due to mechanical threat to breathing due to other causes, accidental, sequela on inpatient claims.

What is the ICD-9 equivalent of T71.191S?

Under the General Equivalence Mappings, asphyxiation due to mechanical threat to breathing due to other causes, accidental, sequela converts to ICD-9-CM 909.4 (late eff cert ext cause). 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.