Toxic effect of aflatoxin and other mycotoxin food contaminants
In Toxic effects of substances chiefly nonmedicinal as to source (T51-T65), chapter 19: Injury, Poisoning and Certain Other Consequences of External Causes
24 billable codes under T64: none are a CC or MCC; 2 map to HCC 155 (Major Depression, Moderate or Severe, without Psychosis).An HCC counts toward a Medicare Advantage patient's risk score.
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Instructional notes
Also applies, from Toxic effects of substances chiefly nonmedicinal as to source (T51-T65)
These notes sit on T51-T65 and apply to every code under it, including T64.
Excludes1: not coded here, use a different code
- contact with and (suspected) exposure to toxic substances (Z77.-)
Use additional code: add a second code for this, listed after this one
Official coding guidelines
From the ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027 (CMS and NCHS). Links open the PDF at the right page.
- Section I.C.19.e Adverse Effects, Poisoning, Underdosing and Toxic Effects (page 82), covers T64
For adverse effects, code the effect first, then T36-T50 with character 5. Sequence poisonings (unknown intent coded accidental) and toxic effects (T51-T65) first; underdosing (character 6) is never first-listed.
Other Chapter 19 topics:
- Application of 7th Characters in Chapter 19 (page 77)
- Coding of Injuries (page 78)
- Coding of Traumatic Fractures (page 79)
- Coding of Burns and Corrosions (page 80)
- Adult and child abuse, neglect and other maltreatment (page 85)
- Complications of care (page 85)
All codes under T64
T64 can't be used on a claim. Pick a billable code below; grey headings group them.
- T64.0Toxic effect of aflatoxin
- T64.01Toxic effect of aflatoxin, accidental (unintentional)
- T64.01XAToxic effect of aflatoxin, accidental (unintentional), initial encounter
- T64.01XDToxic effect of aflatoxin, accidental (unintentional), subsequent encounter
- T64.01XSToxic effect of aflatoxin, accidental (unintentional), sequela
- T64.02Toxic effect of aflatoxin, intentional self-harm
- T64.02XAToxic effect of aflatoxin, intentional self-harm, initial encounter
- T64.02XDToxic effect of aflatoxin, intentional self-harm, subsequent encounter
- T64.02XSToxic effect of aflatoxin, intentional self-harm, sequela
- T64.03Toxic effect of aflatoxin, assault
- T64.03XAToxic effect of aflatoxin, assault, initial encounter
- T64.03XDToxic effect of aflatoxin, assault, subsequent encounter
- T64.03XSToxic effect of aflatoxin, assault, sequela
- T64.04Toxic effect of aflatoxin, undetermined
- T64.04XAToxic effect of aflatoxin, undetermined, initial encounter
- T64.04XDToxic effect of aflatoxin, undetermined, subsequent encounter
- T64.04XSToxic effect of aflatoxin, undetermined, sequela
- T64.8Toxic effect of other mycotoxin food contaminants
- T64.81Toxic effect of other mycotoxin food contaminants, accidental (unintentional)
- T64.81XAToxic effect of other mycotoxin food contaminants, accidental (unintentional), initial encounter
- T64.81XDToxic effect of other mycotoxin food contaminants, accidental (unintentional), subsequent encounter
- T64.81XSToxic effect of other mycotoxin food contaminants, accidental (unintentional), sequela
- T64.82Toxic effect of other mycotoxin food contaminants, intentional self-harm
- T64.82XAToxic effect of other mycotoxin food contaminants, intentional self-harm, initial encounter
- T64.82XDToxic effect of other mycotoxin food contaminants, intentional self-harm, subsequent encounter
- T64.82XSToxic effect of other mycotoxin food contaminants, intentional self-harm, sequela
- T64.83Toxic effect of other mycotoxin food contaminants, assault
- T64.83XAToxic effect of other mycotoxin food contaminants, assault, initial encounter
- T64.83XDToxic effect of other mycotoxin food contaminants, assault, subsequent encounter
- T64.83XSToxic effect of other mycotoxin food contaminants, assault, sequela
- T64.84Toxic effect of other mycotoxin food contaminants, undetermined
- T64.84XAToxic effect of other mycotoxin food contaminants, undetermined, initial encounter
- T64.84XDToxic effect of other mycotoxin food contaminants, undetermined, subsequent encounter
- T64.84XSToxic effect of other mycotoxin food contaminants, undetermined, sequela
T64 MS-DRGs
As the principal diagnosis, the billable codes under T64 group to MS-DRG 917, 918, 922, 923, 949, or 950 (v44.0). Which one applies depends on procedures performed, secondary diagnoses (CC/MCC), and the patient's age and discharge status.
- DRG 917 Poisoning and Toxic Effects of Drugs with MCC (8 of 24 codes)
- DRG 918 Poisoning and Toxic Effects of Drugs without MCC (8 of 24 codes)
- DRG 922 Other Injury, Poisoning and Toxic Effect Diagnoses with MCC (8 of 24 codes)
- DRG 923 Other Injury, Poisoning and Toxic Effect Diagnoses without MCC (8 of 24 codes)
- DRG 949 Aftercare with CC/MCC (8 of 24 codes)
- DRG 950 Aftercare without CC/MCC (8 of 24 codes)
Other codes that refer to T64
Notes on these codes point to T64.
About the condition
Plain-language background from MedlinePlus (National Library of Medicine), not coding guidance.
Molds
Molds are fungi that can be found both outdoors and indoors. They grow best in warm, damp and humid conditions. If you have damp or wet spots in your house, you will probably get mold.
Read more about molds on MedlinePlusCode history
Valid since FY2016, when ICD-10-CM took effect on October 1, 2015. No changes since.