ICD-10-CM 2027 diagnosis code
T71.2Asphyxiation due to systemic oxygen deficiency due to low oxygen content in ambient air
T71.2 is a header code, so it can't be reported by itself. Choose one of the 5 more specific codes beneath it and add the required 7th character.Short description: Asphyxiation due to systemic oxy defic due to low oxy in air
Code unchanged since ICD-10-CM took effect on October 1, 2015. Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data
About T71.2
T71.2 is the ICD-10-CM diagnosis code for asphyxiation due to systemic oxygen deficiency due to low oxygen content in ambient air. It belongs to category T71 (asphyxiation), block T66-T78 (other and unspecified effects of external causes) and chapter 19 (injury, poisoning and certain other consequences of external causes). It is a header code, so it can't be reported by itself; one of its 5 subcodes must be used instead.
Within T71 (asphyxiation), T71.2 is specifically for asphyxiation due to systemic oxygen deficiency due to low oxygen content in ambient air. Related codes cover due to mechanical threat to breathing (T71.1) and due to unspecified cause (T71.9).
Codes in this range require a 7th character: A for initial encounter, D for subsequent encounter and S for sequela. Use placeholder "X" characters to fill any empty positions before the 7th character.
It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.
7th character
The appropriate 7th character is to be added to each code from category T71
- T71.20Asphyxiation due to systemic oxygen deficiency due to low oxygen content in ambient air due to unspecified cause
- T71.21Asphyxiation due to cave-in or falling earth
- T71.22Asphyxiation due to being trapped in a car trunk
- T71.23Asphyxiation due to being trapped in a (discarded) refrigerator
- T71.231Asphyxiation due to being trapped in a (discarded) refrigerator, accidental
- T71.232Asphyxiation due to being trapped in a (discarded) refrigerator, intentional self-harm
- T71.233Asphyxiation due to being trapped in a (discarded) refrigerator, assault
- T71.234Asphyxiation due to being trapped in a (discarded) refrigerator, undetermined
- T71.29Asphyxiation due to being trapped in other low oxygen environment
- Ainitial encounter
- Dsubsequent encounter
- Ssequela
Coding notes
- Suffocation due to systemic oxygen deficiency due to low oxygen content in ambient air
Notes that apply from higher levels
Instructions written at a parent level also apply to T71.2.
› From T71 Asphyxiation
Broader instructions also apply from T66-T78 Other and unspecified effects of external causes and Chapter 19: Injury, poisoning and certain other consequences of external causes.
Code history
- 2016
- 2017
- 2018
- 2019
- 2020
- 2021
- 2022
- 2023
- 2024
- 2025
- 2026
- 2027
- FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
- No changes since FY2016.
Common questions about T71.2
Is T71.2 billable?
- No. T71.2 is a header code. Report one of its more specific subcodes instead.