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T63 vs W59.83XS

T63 (Toxic effect of contact with venomous animals and plants) compared with W59.83XS (Crushed by other nonvenomous reptiles, sequela), from the official CMS tabular data. Do not report these codes together: the official tabular list marks them Excludes1.

Relationship

Conflict

Excludes1 conflict

W59.83XS
Crushed by other nonvenomous reptiles, sequela
↔
T63
Toxic effect of contact with venomous animals and plants

Not coded here — these two are mutually exclusive.

“Toxic effect of contact with venomous animals and plants (T63.-)”

An Excludes1 note means the two conditions cannot occur together, so the pair should not be reported for the same encounter. The sole exception is when the conditions are documented as unrelated to each other.

Source: CMS ICD-10-CM tabular instructional notes; ICD-10-CM Official Guidelines, Section I.A.12.a

Can these codes be reported together?

No — do not report together. W59.83XS carries an Excludes1 note covering T63: “Toxic effect of contact with venomous animals and plants (T63.-)”

Sole exception: when the two conditions are documented as unrelated to each other (ICD-10-CM Official Guidelines, Section I.A.12.a).

Side by side

T63Toxic effect of contact with venomous animals and plantsW59.83XSCrushed by other nonvenomous reptiles, sequela
Billing statusNon-billable header

Report instead: T63.001A, T63.001D, T63.001S, T63.002A, T63.002D

Billable
ClassificationS00-T88 — Injury, Poisoning and Certain Other Consequences of External Causes (S00-T88)V00-Y99 — External Causes of Morbidity (V00-Y99)
DefinitionToxic effect of contact with venomous animals and plants is a non-billable ICD-10-CM category code (T63).Crushed by other nonvenomous reptiles, sequela is a billable ICD-10-CM diagnosis code (W59.83S).
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 W59
Includes
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)
—
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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