2026 ICD-10-CM Diagnosis Code T64Toxic effect of aflatoxin and other mycotoxin food contaminants

ICD-10-CM Codes›S00–T88›T51-T65›T64

ICD-10-CM T64
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

T64 is a non-billable ICD-10-CM category code for toxic effect of aflatoxin and other mycotoxin food contaminants, so it cannot be submitted on claims. Use a more specific code from this category instead, such as T64.01XA, T64.01XD, T64.01XS, and T64.02XA.

Code Identity

ICD-10-CM Code
T64
Billable Status
No — Non-Billable Category
Code Describes
Toxic effect of aflatoxin and other mycotoxin food contaminants
Chapter
T51-T65
Toxic effects of substances chiefly nonmedicinal as to source

Code Classification

ChapterS00–T88Injury, poisoning and certain other consequences of external causes
SectionT51-T65Toxic effects of substances chiefly nonmedicinal as to source
CategoryT64Toxic effect of aflatoxin and other mycotoxin food contaminants
This CodeT64Toxic effect of aflatoxin and other mycotoxin food contaminants

Specific Coding for Toxic effect of aflatoxin and oth mycotoxin food contamntOverview

Non-specific codes like T64 require more characters. Use one of these billable codes instead:

  • T64.0 for Toxic effect of aflatoxin

  • T64.01 for Toxic effect of aflatoxin, accidental (unintentional)

  • T64.02 for Toxic effect of aflatoxin, intentional self-harm

  • T64.03 for Toxic effect of aflatoxin, assault

  • T64.04 for Toxic effect of aflatoxin, undetermined

  • T64.8 for Toxic effect of other mycotoxin food contaminants

  • T64.81 for Toxic effect of other mycotoxin food contaminants, accidental (unintentional)

  • T64.82 for Toxic effect of other mycotoxin food contaminants, intentional self-harm

  • T64.83 for Toxic effect of other mycotoxin food contaminants, assault

  • T64.84 for Toxic effect of other mycotoxin food contaminants, undetermined

Coding GuidelinesGuidance

The appropriate 7th character is to be added to each code from block Toxic effect of aflatoxin and other mycotoxin food contaminants (T64). Use the following options for the applicable episode of care:

  • A - initial encounter
  • D - subsequent encounter
  • S - sequela

Source: ICD-10-CM Official Guidelines for Coding and Reporting, FY 2026, published by CMS and the National Center for Health Statistics.

Tabular List NotesGuidance

Coding notes and annotation back-references applicable to this code.

7th Character Note

  • The appropriate 7th character is to be added to each code from category T64

7th Character

  • A - initial encounter
  • D - subsequent encounter
  • S - sequela

Patient EducationClinical

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Read the full article at MedlinePlus

Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About T64Overview

Is T64 a billable code?

No. This is a category header that groups the codes for toxic effect of aflatoxin and other mycotoxin food contaminants, and headers cannot be submitted on claims. Claims for toxic effect of aflatoxin and other mycotoxin food contaminants need a more specific code from this category, such as T64.01XA, T64.01XD, and T64.01XS.