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T64.81 vs T64.84

T64.81 (Toxic effect of other mycotoxin food contaminants, accidental (unintentional)) compared with T64.84 (Toxic effect of other mycotoxin food contaminants, undetermined), from the official CMS tabular data. T64.81 and T64.84 code the same substance (Ergot) with a different intent.

Relationship

Informational

Drug table relationship

T64.81
Toxic effect of other mycotoxin food contaminants, accidental (unintentional)
↔
T64.84
Toxic effect of other mycotoxin food contaminants, undetermined

Same substance, different circumstance of exposure.

Same substance — undetermined intent (Ergot)

Accidental poisoning, intentional self-harm, assault, undetermined intent, adverse effect and underdosing are mutually exclusive columns — exactly one applies to a given encounter.

Source: CMS Table of Drugs and Chemicals

Can these codes be reported together?

Same substance, different intent. T64.81 and T64.84 code the same substance (Ergot) with a different circumstance of exposure.

From the CMS Table of Drugs and Chemicals: accidental poisoning, intentional self-harm, assault, undetermined intent, adverse effect and underdosing are mutually exclusive columns — only one of them applies to a given encounter.

Side by side

T64.81Toxic effect of other mycotoxin food contaminants, accidental (unintentional)T64.84Toxic effect of other mycotoxin food contaminants, undetermined
Billing statusNon-billable headerNon-billable header
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 other mycotoxin food contaminants, accidental (unintentional) is a non-billable ICD-10-CM category code (T64.81).Toxic effect of other mycotoxin food contaminants, undetermined is a non-billable ICD-10-CM category code (T64.84).
7th characterThe appropriate 7th character is to be added to each code from category T64The 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