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T17.810A vs T17.810D

T17.810A (Gastric contents in other parts of respiratory tract causing asphyxiation, initial encounter) compared with T17.810D (Gastric contents in other parts of respiratory tract causing asphyxiation, subsequent encounter), from the official CMS tabular data. T17.810A and T17.810D code the same injury at a different phase of treatment.

Relationship

Review

Encounter relationship

T17.810A
Initial encounter
Gastric contents in other parts of respiratory tract causing asphyxiation, initial encounter
↔
T17.810D
Subsequent encounter
Gastric contents in other parts of respiratory tract causing asphyxiation, 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. T17.810A and T17.810D 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

T17.810AGastric contents in other parts of respiratory tract causing asphyxiation, initial encounterT17.810DGastric contents in other parts of respiratory tract causing asphyxiation, subsequent encounter
Billing statusBillableBillable
ClassificationS00-T88 — Injury, poisoning and certain other consequences of external causesS00-T88 — Injury, poisoning and certain other consequences of external causes
DefinitionGastric contents in other parts of respiratory tract causing asphyxiation, initial encounter is a billable ICD-10-CM diagnosis code (T17.810A).Gastric contents in other parts of respiratory tract causing asphyxiation, subsequent encounter is a billable ICD-10-CM diagnosis code (T17.810D).
7th characterThe appropriate 7th character is to be added to each code from category T17The appropriate 7th character is to be added to each code from category T17
Use additional code
code, if known, for foreign body entering into or through a natural orifice (W44.-)
code, if known, for foreign body entering into or through a natural orifice (W44.-)
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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