T80.1XXA vs T80.1XXS

T80.1XXA (Vascular complications following infusion, transfusion and therapeutic injection, initial encounter) compared with T80.1XXS (Vascular complications following infusion, transfusion and therapeutic injection, sequela), from the official CMS tabular data. T80.1XXA and T80.1XXS code the same injury at a different phase of treatment.

Relationship

Review

Encounter relationship

T80.1XXA

Initial encounter

Vascular complications following infusion, transfusion and therapeutic injection, initial encounter

↔

T80.1XXS

Sequela

Vascular complications following infusion, transfusion and therapeutic injection, sequela

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. T80.1XXA and T80.1XXS 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

	T80.1XXAVascular complications following infusion, transfusion and therapeutic injection, initial encounter	T80.1XXSVascular complications following infusion, transfusion and therapeutic injection, sequela
Billing status	Billable	Billable
Classification	S00-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)
Definition	Vascular complications following infusion, transfusion and therapeutic injection, initial encounter is a billable ICD-10-CM diagnosis code (T80.1A).	Vascular complications following infusion, transfusion and therapeutic injection, sequela is a billable ICD-10-CM diagnosis code (T80.1S).
7th character	The appropriate 7th character is to be added to each code from category T80	The appropriate 7th character is to be added to each code from category T80
Includes	complications following perfusion	complications following perfusion
Use additional code	code to identify the vascular complication code for adverse effect, if applicable, to identify drug (T36-T50 with fifth or sixth character 5) code(s) to identify the specified condition resulting from the complication	code to identify the vascular complication code for adverse effect, if applicable, to identify drug (T36-T50 with fifth or sixth character 5) code(s) to identify the specified condition resulting from the complication

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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