T71.1 - Asphyxiation due to mechanical threat to breathing
T71.14 - Asphyxiation due to smothering under another person's body (in bed)
T71.141 - Asphyxiation due to smothering under another person's body (in bed), accidental
T71.143 - Asphyxiation due to smothering under another person's body (in bed), assault
T71.144 - Asphyxiation due to smothering under another person's body (in bed), undetermined