R09.01 vs T71.29XA
R09.01 (Asphyxia) compared with T71.29XA (Asphyxiation due to being trapped in other low oxygen environment, initial encounter), from the official CMS tabular data. Do not report these codes together: the official tabular list marks them Excludes1.
Can these codes be reported together?
No — do not report together. R09.01 carries an Excludes1 note covering T71.29XA: “traumatic asphyxia (T71.-)”
Sole exception: when the two conditions are documented as unrelated to each other (ICD-10-CM Official Guidelines, Section I.A.12.a).
No — do not report together. T71.29XA carries an Excludes1 note covering R09.01: “asphyxia NOS (R09.01)”
Sole exception: when the two conditions are documented as unrelated to each other (ICD-10-CM Official Guidelines, Section I.A.12.a).
Side by side
| R09.01Asphyxia | T71.29XAAsphyxiation due to being trapped in other low oxygen environment, initial encounter | |
|---|---|---|
| Billing status | Billable | Billable |
| Classification | R00-R99 — Symptoms, Signs and Abnormal Clinical and Laboratory Findings, Not Elsewhere Classified (R00-R99) | S00-T88 — Injury, Poisoning and Certain Other Consequences of External Causes (S00-T88) |
| Definition | Asphyxia is a billable ICD-10-CM diagnosis code (R09.01). | Asphyxiation due to being trapped in other low oxygen environment, initial encounter is a billable ICD-10-CM diagnosis code (T71.29A). |
| 7th character | — | The appropriate 7th character is to be added to each code from category T71 |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources