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T63.611A vs T63.611S

T63.611A (Toxic effect of contact with Portuguese Man-o-war, accidental (unintentional), initial encounter) compared with T63.611S (Toxic effect of contact with Portuguese Man-o-war, accidental (unintentional), sequela), from the official CMS tabular data. T63.611A and T63.611S code the same injury at a different phase of treatment.

Can these codes be reported together?

Same injury, other encounter phase. T63.611A and T63.611S 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

T63.611AToxic effect of contact with Portuguese Man-o-war, accidental (unintentional), initial encounterT63.611SToxic effect of contact with Portuguese Man-o-war, accidental (unintentional), sequela
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)
DefinitionToxic effect of contact with Portuguese Man-o-war, accidental (unintentional), initial encounter is a billable ICD-10-CM diagnosis code (T63.611A).Toxic effect of contact with Portuguese Man-o-war, accidental (unintentional), sequela is a billable ICD-10-CM diagnosis code (T63.611S).
7th characterThe appropriate 7th character is to be added to each code from category T63The appropriate 7th character is to be added to each code from category T63
Includes
bite or touch of venomous animal
pricked or stuck by thorn or leaf
bite or touch of venomous animal
pricked or stuck by thorn or leaf
Use additional code
code(s):
for all associated manifestations of toxic effect, such as: respiratory conditions due to external agents (J60-J70)
personal history of foreign body fully removed (Z87.821)
code(s):
for all associated manifestations of toxic effect, such as: respiratory conditions due to external agents (J60-J70)
personal history of foreign body fully removed (Z87.821)

Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources