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T71.154A vs T71.154D

T71.154A (Asphyxiation due to smothering in furniture, undetermined, initial encounter) compared with T71.154D (Asphyxiation due to smothering in furniture, undetermined, subsequent encounter), from the official CMS tabular data. T71.154A and T71.154D code the same injury at a different phase of treatment.

Relationship

Review

Encounter relationship

T71.154A
Initial encounter
Asphyxiation due to smothering in furniture, undetermined, initial encounter
↔
T71.154D
Subsequent encounter
Asphyxiation due to smothering in furniture, undetermined, 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. T71.154A and T71.154D 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

T71.154AAsphyxiation due to smothering in furniture, undetermined, initial encounterT71.154DAsphyxiation due to smothering in furniture, undetermined, 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 in furniture, undetermined, initial encounter is a billable ICD-10-CM diagnosis code (T71.154A).Asphyxiation due to smothering in furniture, undetermined, subsequent encounter is a billable ICD-10-CM diagnosis code (T71.154D).
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