2026 ICD-10-CM Diagnosis Code T60.1X4AToxic effect of halogenated insecticides, undetermined, initial encounter
T60.1X4A is a billable ICD-10-CM diagnosis code for toxic effect of halogenated insecticides, undetermined, initial encounter. The 7th character A marks it as an initial encounter code, used while the patient is receiving active treatment. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 917 through 918. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under External cause codes: intent of injury, undetermined; External cause codes: poisoning by non-drug; and Toxic effects, initial encounter.
Code Identity
Code Classification
Coding GuidelinesGuidance
The appropriate 7th character is to be added to each code from block Toxic effect of pesticides (T60). 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.
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
Clinical InformationClinical
Diflubenzuron
an insect growth regulator which interferes with the formation of the insect cuticle. it is effective in the control of mosquitoes and flies.Endrin
an organochlorine compound that was formerly used as an insecticide. its manufacture and use has been discontinued in the united states. (from merck index, 11th ed)Heptachlor
a man-made compound previously used to control termites and other insects. even though production of heptachlor was phased out of use in the united states during the late 1980's it remains in soil and hazardous waste sites. it is clearly toxic to animals and humans but, the international agency for research on cancer (iarc) has determined that heptachlor is not classifiable as to its carcinogenicity to humans. (from atsdr public heath statement, april 1989)Heptachlor Epoxide
an oxidation product of heptachlor formed by many plants and animals, including humans, after exposure to heptachlor. it has been shown to remain in soil treated with heptachlor for over fifteen years and is toxic to animals and humans. (from atsdr public heath statement, april 1989)Permethrin
a pyrethroid insecticide commonly used in the treatment of lice infestations and scabies.
Table of Drugs and ChemicalsClinical
Substances in the Table of Drugs and Chemicals that reference this code family. Always confirm in the Tabular List before coding.
| Substance | Accidental | Self-harm | Assault | Undetermined | Adverse Effect | Underdosing |
|---|---|---|---|---|---|---|
| 2,4,5-T (trichloro-phenoxyacetic acid) | T60.1X1 | T60.1X2 | T60.1X3 | T60.1X4 | – | – |
| Aldrin (dust) | T60.1X1 | T60.1X2 | T60.1X3 | T60.1X4 | – | – |
| Chlordan (e) (dust) | T60.1X1 | T60.1X2 | T60.1X3 | T60.1X4 | – | – |
| Chlorophenothane | T60.1X1 | T60.1X2 | T60.1X3 | T60.1X4 | – | – |
| Cryolite (vapor) | T60.1X1 | T60.1X2 | T60.1X3 | T60.1X4 | – | – |
| Cryolite (vapor)::insecticide | T60.1X1 | T60.1X2 | T60.1X3 | T60.1X4 | – | – |
| Cyhalothrin | T60.1X1 | T60.1X2 | T60.1X3 | T60.1X4 | – | – |
| Cypermethrin | T60.1X1 | T60.1X2 | T60.1X3 | T60.1X4 | – | – |
| DDT (dust) | T60.1X1 | T60.1X2 | T60.1X3 | T60.1X4 | – | – |
| Deltamethrin | T60.1X1 | T60.1X2 | T60.1X3 | T60.1X4 | – | – |
| Dieldrin (vapor) | T60.1X1 | T60.1X2 | T60.1X3 | T60.1X4 | – | – |
| Diflubenzuron | T60.1X1 | T60.1X2 | T60.1X3 | T60.1X4 | – | – |
| Endrin | T60.1X1 | T60.1X2 | T60.1X3 | T60.1X4 | – | – |
| Heptachlor | T60.1X1 | T60.1X2 | T60.1X3 | T60.1X4 | – | – |
| Isobenzan | T60.1X1 | T60.1X2 | T60.1X3 | T60.1X4 | – | – |
| Kelevan | T60.1X1 | T60.1X2 | T60.1X3 | T60.1X4 | – | – |
| Kwell (insecticide) | T60.1X1 | T60.1X2 | T60.1X3 | T60.1X4 | – | – |
| Kwell (insecticide)::anti-infective (topical) | T60.1X1 | T60.1X2 | T60.1X3 | T60.1X4 | – | – |
| Mirex | T60.1X1 | T60.1X2 | T60.1X3 | T60.1X4 | – | – |
| PCP | T60.1X1 | T60.1X2 | T60.1X3 | T60.1X4 | – | – |
| PCP::meaning pentachlorophenol | T60.1X1 | T60.1X2 | T60.1X3 | T60.1X4 | – | – |
| PCP::meaning pentachlorophenol::fungicide | T60.1X1 | T60.1X2 | T60.1X3 | T60.1X4 | – | – |
| PCP::meaning pentachlorophenol::herbicide | T60.1X1 | T60.1X2 | T60.1X3 | T60.1X4 | – | – |
| PCP::meaning pentachlorophenol::insecticide | T60.1X1 | T60.1X2 | T60.1X3 | T60.1X4 | – | – |
| PCP::meaning phencyclidine | T60.1X1 | T60.1X2 | T60.1X3 | T60.1X4 | – | – |
| Pentachlorophenol (pesticide) | T60.1X1 | T60.1X2 | T60.1X3 | T60.1X4 | – | – |
| Pentachlorophenol (pesticide)::fungicide | T60.1X1 | T60.1X2 | T60.1X3 | T60.1X4 | – | – |
| Pentachlorophenol (pesticide)::herbicide | T60.1X1 | T60.1X2 | T60.1X3 | T60.1X4 | – | – |
| Pentachlorophenol (pesticide)::insecticide | T60.1X1 | T60.1X2 | T60.1X3 | T60.1X4 | – | – |
| Permethrin | T60.1X1 | T60.1X2 | T60.1X3 | T60.1X4 | – | – |
| Strobane | T60.1X1 | T60.1X2 | T60.1X3 | T60.1X4 | – | – |
| Toxaphene (dust) (spray) | T60.1X1 | T60.1X2 | T60.1X3 | T60.1X4 | – | – |
Patient EducationClinical
Pesticides
Pests live where they are not wanted or cause harm to crops, people, or animals. Pesticides can help get rid of them. Pesticides are not just insect killers. They also include chemicals to control weeds, rodents, mildew, germs, and more. Many household products contain pesticides.
Read the full article at MedlinePlus
Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.
Convert T60.1X4A to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About T60.1X4AOverview
Is T60.1X4A (Toxic effect of halogenated insecticides, undetermined) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report toxic effect of halogenated insecticides, undetermined, initial encounter on HIPAA-covered claims from October 1, 2025 through September 30, 2026.
What does the 7th character A in T60.1X4A mean?
The final character A marks the initial encounter: use it while the patient is receiving active treatment for toxic effect of halogenated insecticides, undetermined, such as an emergency visit or first evaluation.
What MS-DRG does T60.1X4A group to?
When toxic effect of halogenated insecticides, undetermined, initial encounter is the principal diagnosis on an inpatient stay, it groups to MS-DRG 917, 918, with relative weights from 0.8571 to 1.5684 depending on complications. Higher weights mean higher Medicare reimbursement.
What is the ICD-9 equivalent of T60.1X4A?
Under the General Equivalence Mappings, toxic effect of halogenated insecticides, undetermined, initial encounter converts to ICD-9-CM 989.4 (toxic eff pesticides NEC) and E980.7 (undet pois-agricult agnt). The mapping is approximate, so confirm the match fits the documentation.
Footnotes
[1] Not chronic - A diagnosis code that does not fit the criteria for chronic condition (duration, ongoing medical treatment, and limitations) is considered not chronic. Some codes designated as not chronic are acute conditions. Other diagnosis codes that indicate a possible chronic condition, but for which the duration of the illness is not specified in the code description (i.e., we do not know the condition has lasted 12 months or longer) also are considered not chronic.
