T71.29 — Asphyxiation due to being trapped in other low oxygen environment

Not billable

Is T71.29 billable?

No — T71.29 is a non-billable header code. T71.29 groups more specific codes and cannot be submitted on a claim. A valid ICD-10-CM code must be reported at the highest level of specificity available in its branch. Select one of the 3 billable codes beneath T71.29.

Billable codes under this header

T71.29XAAsphyxiation due to being trapped in other low oxygen environment, initial encounter
T71.29XDAsphyxiation due to being trapped in other low oxygen environment, subsequent encounter
T71.29XSAsphyxiation due to being trapped in other low oxygen environment, sequela

T71.29 at a glance

Code	T71.29
Description	Asphyxiation due to being trapped in other low oxygen environment
Billable	No — header code
Code set	ICD-10-CM FY2027
Valid for encounters	October 1, 2026 – September 30, 2027

How is T71.29 listed in the Alphabetic Index?

These are the routes through the Alphabetic Index that lead to T71.29. They show the wording a clinician may have documented, which often differs from the Tabular description.

Asphyxia, asphyxiation › traumatic › due to › low oxygen content of ambient air › due to › being trapped in › low oxygen environment (by)

How is T71.29 listed in the External Cause Index?

The External Cause of Injuries Index lists these routes under T71, the nearest indexed parent of T71.29. This is a separate index from the Alphabetic Index and is where external cause codes are looked up.

Suffocation (accidental) (by external means) (by pressure) (mechanical)

Excludes1 — never code together — inherited from T71

The conditions below can never be reported together with T71.29 on the same claim. An Excludes1 note means the two conditions cannot occur in the same patient, so reporting both is a coding error.

acute respiratory distress (syndrome) (J80)
anoxia due to high altitude (T70.2)
asphyxia NOS (R09.01)
asphyxia from carbon monoxide (T58.-)
asphyxia from inhalation of food or foreign body (T17.-)
asphyxia from other gases, fumes and vapors (T59.-)
respiratory distress (syndrome) in newborn (P22.-)

Use additional code — inherited from Chapter 19

Report an additional code alongside T71.29 to fully describe the condition. T71.29 is sequenced first.

code to identify any retained foreign body, if applicable (Z18.-)

Excludes2 — not included here — inherited from Chapter 19

The conditions below are not part of T71.29, but a patient may have both at the same time. When documentation supports it, T71.29 and the excluded code may both be reported.

birth trauma (P10-P15)
obstetric trauma (O70-O71)

Code also — inherited from T66-T78

Two codes may be needed to describe the condition fully. Whether T71.29 is sequenced first depends on the reason for the encounter.

, if applicable, place of occurrence, such as:
highway rest stop (Y92.523)
school (private) (public) (state) as the place of occurrence of the external cause (Y92.21-)
service areas as the place of occurrence of the external cause (Y92.52-)
single-family non-institutional (private) house as the place of occurrence of the external cause (Y92.01-)
transport vehicle as the place of occurrence of the external cause (Y92.81-)

What codes fall under T71.29? (3)

How long has T71.29 existed?

T71.29 has been in ICD-10-CM since at least FY2016, the earliest fiscal year on record here.

Derived from the official order files for FY2016–FY2026. FY2017 and FY2020 publish no order file, so those years are not covered.

Which conditions are coded to T71.29?

ICD-10 code for Asphyxia