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T71.143A vs T71.143D

T71.143A (Asphyxiation due to smothering under another person's body (in bed), assault, initial encounter) compared with T71.143D (Asphyxiation due to smothering under another person's body (in bed), assault, subsequent encounter), from the official CMS tabular data. T71.143A and T71.143D code the same injury at a different phase of treatment.

Relationship

Review

Encounter relationship

T71.143A
Initial encounter
Asphyxiation due to smothering under another person's body (in bed), assault, initial encounter
↔
T71.143D
Subsequent encounter
Asphyxiation due to smothering under another person's body (in bed), assault, subsequent encounter

Same underlying diagnosis, different encounter phase.

The 7th character records the phase of care for the encounter being coded, so a single encounter takes one of these characters, not several. Review whether both phases belong on the same episode of care.

Source: ICD-10-CM Official Guidelines, Section I.C.19.a

Can these codes be reported together?

Same injury, other encounter phase. T71.143A and T71.143D code the same injury at a different phase of treatment, set by the 7th character.

The 7th character records the type of care given at the encounter being coded (ICD-10-CM Official Guidelines, Section I.C.19.a), so one encounter takes one of these, not both.

Side by side

T71.143AAsphyxiation due to smothering under another person's body (in bed), assault, initial encounterT71.143DAsphyxiation due to smothering under another person's body (in bed), assault, subsequent encounter
Billing statusBillableBillable
ClassificationS00-T88 — Injury, Poisoning and Certain Other Consequences of External Causes (S00-T88)S00-T88 — Injury, Poisoning and Certain Other Consequences of External Causes (S00-T88)
DefinitionAsphyxiation due to smothering under another person's body (in bed), assault, initial encounter is a billable ICD-10-CM diagnosis code (T71.143A).Asphyxiation due to smothering under another person's body (in bed), assault, subsequent encounter is a billable ICD-10-CM diagnosis code (T71.143D).
7th characterThe appropriate 7th character is to be added to each code from category T71The appropriate 7th character is to be added to each code from category T71
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Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources