2026 ICD-10-CM Diagnosis Code T71.191AAsphyxiation due to mechanical threat to breathing due to other causes, accidental, initial encounter
T71.191A is a billable ICD-10-CM diagnosis code for asphyxiation due to mechanical threat to breathing due to other causes, accidental, 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 922 through 923. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Effect of other external causes, initial encounter; External cause codes: intent of injury, accidental/unintentional; and External cause codes: suffocation/inhalation; initial encounter.
Code Identity
Code Classification
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.
Convert T71.191A to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About T71.191AOverview
Is T71.191A 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, initial encounter on HIPAA-covered claims from October 1, 2025 through September 30, 2026.
What does the 7th character A in T71.191A mean?
The final character A marks the initial encounter: use it while the patient is receiving active treatment for asphyxiation due to mechanical threat to breathing due to other causes, accidental, such as an emergency visit or first evaluation.
What MS-DRG does T71.191A group to?
When asphyxiation due to mechanical threat to breathing due to other causes, accidental, initial encounter 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.
What is the ICD-9 equivalent of T71.191A?
Under the General Equivalence Mappings, asphyxiation due to mechanical threat to breathing due to other causes, accidental, initial encounter converts to ICD-9-CM 994.7 (asphyxiation/strangulat) and E913.8 (suffocation NEC). 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.
