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Compare/T61 vs T64

T61 vs T64

T61 (Toxic effect of noxious substances eaten as seafood) compared with T64 (Toxic effect of aflatoxin and other mycotoxin food contaminants), from the official CMS tabular data. Do not report these codes together: the official tabular list marks them Excludes1.

Can these codes be reported together?

No — do not report together. T61 carries an Excludes1 note covering T64: “toxic effect of aflatoxin and other mycotoxins (T64)”

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

T61Toxic effect of noxious substances eaten as seafoodT64Toxic effect of aflatoxin and other mycotoxin food contaminants
Billing statusNon-billable header

Report instead: T61.01XA, T61.01XD, T61.01XS, T61.02XA, T61.02XD

Non-billable header

Report instead: T64.01XA, T64.01XD, T64.01XS, T64.02XA, T64.02XD

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 noxious substances eaten as seafood is a non-billable ICD-10-CM category code (T61).Toxic effect of aflatoxin and other mycotoxin food contaminants is a non-billable ICD-10-CM category code (T64).
7th characterThe appropriate 7th character is to be added to each code from category T61The appropriate 7th character is to be added to each code from category T64
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)
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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