2026 ICD-10-CM Diagnosis Code T60.0X4AToxic effect of organophosphate and carbamate insecticides, undetermined, initial encounter
T60.0X4A is a billable ICD-10-CM diagnosis code for toxic effect of organophosphate and carbamate 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
Aldicarb
carbamate derivative used as an insecticide, acaricide, and nematocide.Benomyl
a systemic agricultural fungicide used for control of certain fungal diseases of stone fruit.Carbaryl
a carbamate insecticide and parasiticide. it is a potent anticholinesterase agent belonging to the carbamate group of reversible cholinesterase inhibitors. it has a particularly low toxicity from dermal absorption and is used for control of head lice in some countries.Chlorfenvinphos
an organophosphorus cholinesterase inhibitor that is used as an insecticide and an acaricide.Coumaphos
a organothiophosphorus cholinesterase inhibitor that is used as an anthelmintic, insecticide, and as a nematocide.Diazinon
a cholinesterase inhibitor that is used as an organothiophosphorus insecticide.Dichlorvos
an organophosphorus insecticide that inhibits acetylcholinesterase.Dimethoate
an organothiophosphorus cholinesterase inhibitor that is used as a systemic and contact insecticide.Disulfoton
an organothiophosphate insecticide.Fenthion
potent cholinesterase inhibitor used as an insecticide and acaricide.Leptophos
an organothiophosphate insecticide.Mevinphos
an organophosphate cholinesterase inhibitor that is used as an insecticide.Organophosphates
carbon-containing phosphoric acid derivatives. included under this heading are compounds that have carbon atoms bound to one or more oxygen atoms of the p(=o)(o)3 structure. note that several specific classes of endogenous phosphorus-containing compounds such as nucleotides; phospholipids; and phosphoproteins are listed elsewhere.Aryldialkylphosphatase
an enzyme which catalyzes the hydrolysis of an aryl-dialkyl phosphate to form dialkyl phosphate and an aryl alcohol. it can hydrolyze a broad spectrum of organophosphate substrates and a number of aromatic carboxylic acid esters. it may also mediate an enzymatic protection of low density lipoproteins against oxidative modification and the consequent series of events leading to atheroma formation. the enzyme was previously regarded to be identical with arylesterase (ec 3.1.1.2).Paraoxon
an organophosphate cholinesterase inhibitor that is used as a pesticide.Methyl Parathion
the methyl homolog of parathion. an effective, but highly toxic, organothiophosphate insecticide and cholinesterase inhibitor.Parathion
a highly toxic cholinesterase inhibitor that is used as an acaricide and as an insecticide.Phorate
a cholinesterase inhibitor that is used as an insecticide.Phosphamidon
an organophosphate cholinesterase inhibitor that is used as an insecticide.Propoxur
a carbamate insecticide.Trichlorfon
an organochlorophosphate cholinesterase inhibitor that is used as an insecticide for the control of flies and roaches. it is also used in anthelmintic compositions for animals. (from merck, 11th ed)
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 |
|---|---|---|---|---|---|---|
| Aldicarb | T60.0X1 | T60.0X2 | T60.0X3 | T60.0X4 | – | – |
| Azinphos (ethyl) (methyl) | T60.0X1 | T60.0X2 | T60.0X3 | T60.0X4 | – | – |
| Benomyl | T60.0X1 | T60.0X2 | T60.0X3 | T60.0X4 | – | – |
| Carbamate (insecticide) | T60.0X1 | T60.0X2 | T60.0X3 | T60.0X4 | – | – |
| Carbaril | T60.0X1 | T60.0X2 | T60.0X3 | T60.0X4 | – | – |
| Carbaryl | T60.0X1 | T60.0X2 | T60.0X3 | T60.0X4 | – | – |
| Carbophenothion | T60.0X1 | T60.0X2 | T60.0X3 | T60.0X4 | – | – |
| Chlorfenvinphos | T60.0X1 | T60.0X2 | T60.0X3 | T60.0X4 | – | – |
| Chlormephos | T60.0X1 | T60.0X2 | T60.0X3 | T60.0X4 | – | – |
| Chloropyrifos | T60.0X1 | T60.0X2 | T60.0X3 | T60.0X4 | – | – |
| Chlorthiophos | T60.0X1 | T60.0X2 | T60.0X3 | T60.0X4 | – | – |
| Chlorthion | T60.0X1 | T60.0X2 | T60.0X3 | T60.0X4 | – | – |
| Coumaphos | T60.0X1 | T60.0X2 | T60.0X3 | T60.0X4 | – | – |
| Demephion -O and -S | T60.0X1 | T60.0X2 | T60.0X3 | T60.0X4 | – | – |
| Demeton -O and -S | T60.0X1 | T60.0X2 | T60.0X3 | T60.0X4 | – | – |
| Diazinon | T60.0X1 | T60.0X2 | T60.0X3 | T60.0X4 | – | – |
| Dicapthon | T60.0X1 | T60.0X2 | T60.0X3 | T60.0X4 | – | – |
| Dichlorvos | T60.0X1 | T60.0X2 | T60.0X3 | T60.0X4 | – | – |
| Dicrotophos | T60.0X1 | T60.0X2 | T60.0X3 | T60.0X4 | – | – |
| Dimefox | T60.0X1 | T60.0X2 | T60.0X3 | T60.0X4 | – | – |
| Dimethoate | T60.0X1 | T60.0X2 | T60.0X3 | T60.0X4 | – | – |
| Dimetilan | T60.0X1 | T60.0X2 | T60.0X3 | T60.0X4 | – | – |
| Dioxathion | T60.0X1 | T60.0X2 | T60.0X3 | T60.0X4 | – | – |
| Disulfoton | T60.0X1 | T60.0X2 | T60.0X3 | T60.0X4 | – | – |
| Dithiocarbamate | T60.0X1 | T60.0X2 | T60.0X3 | T60.0X4 | – | – |
| EPN | T60.0X1 | T60.0X2 | T60.0X3 | T60.0X4 | – | – |
| Ethion | T60.0X1 | T60.0X2 | T60.0X3 | T60.0X4 | – | – |
| Fenthion | T60.0X1 | T60.0X2 | T60.0X3 | T60.0X4 | – | – |
| Fluorophosphate insecticide | T60.0X1 | T60.0X2 | T60.0X3 | T60.0X4 | – | – |
| HETP | T60.0X1 | T60.0X2 | T60.0X3 | T60.0X4 | – | – |
| Hexaethyl tetraphosphate | T60.0X1 | T60.0X2 | T60.0X3 | T60.0X4 | – | – |
| Leptophos | T60.0X1 | T60.0X2 | T60.0X3 | T60.0X4 | – | – |
| Mephosfolan | T60.0X1 | T60.0X2 | T60.0X3 | T60.0X4 | – | – |
| Metaphos | T60.0X1 | T60.0X2 | T60.0X3 | T60.0X4 | – | – |
| Metrifonate | T60.0X1 | T60.0X2 | T60.0X3 | T60.0X4 | – | – |
| Mevinphos | T60.0X1 | T60.0X2 | T60.0X3 | T60.0X4 | – | – |
| Mipafox | T60.0X1 | T60.0X2 | T60.0X3 | T60.0X4 | – | – |
| Naled | T60.0X1 | T60.0X2 | T60.0X3 | T60.0X4 | – | – |
| Octamethyl pyrophos-phoramide | T60.0X1 | T60.0X2 | T60.0X3 | T60.0X4 | – | – |
| OMPA | T60.0X1 | T60.0X2 | T60.0X3 | T60.0X4 | – | – |
| Organophosphates | T60.0X1 | T60.0X2 | T60.0X3 | T60.0X4 | – | – |
| Paraoxon | T60.0X1 | T60.0X2 | T60.0X3 | T60.0X4 | – | – |
| Parathion | T60.0X1 | T60.0X2 | T60.0X3 | T60.0X4 | – | – |
| Phenylsulfthion | T60.0X1 | T60.0X2 | T60.0X3 | T60.0X4 | – | – |
| Phorate | T60.0X1 | T60.0X2 | T60.0X3 | T60.0X4 | – | – |
| Phosdrin | T60.0X1 | T60.0X2 | T60.0X3 | T60.0X4 | – | – |
| Phosfolan | T60.0X1 | T60.0X2 | T60.0X3 | T60.0X4 | – | – |
| Phosphamidon | T60.0X1 | T60.0X2 | T60.0X3 | T60.0X4 | – | – |
| Propoxur | T60.0X1 | T60.0X2 | T60.0X3 | T60.0X4 | – | – |
| Prothoate | T60.0X1 | T60.0X2 | T60.0X3 | T60.0X4 | – | – |
| Quinalphos | T60.0X1 | T60.0X2 | T60.0X3 | T60.0X4 | – | – |
| Schradan | T60.0X1 | T60.0X2 | T60.0X3 | T60.0X4 | – | – |
| TEPP | T60.0X1 | T60.0X2 | T60.0X3 | T60.0X4 | – | – |
| Terbufos | T60.0X1 | T60.0X2 | T60.0X3 | T60.0X4 | – | – |
| Thiocarbamate (insecticide) | T60.0X1 | T60.0X2 | T60.0X3 | T60.0X4 | – | – |
| Thiofos | T60.0X1 | T60.0X2 | T60.0X3 | T60.0X4 | – | – |
| Thionazin | T60.0X1 | T60.0X2 | T60.0X3 | T60.0X4 | – | – |
| Trichlorfon | T60.0X1 | T60.0X2 | T60.0X3 | T60.0X4 | – | – |
| Trichloronate | T60.0X1 | T60.0X2 | T60.0X3 | T60.0X4 | – | – |
| Zineb | T60.0X1 | T60.0X2 | T60.0X3 | T60.0X4 | – | – |
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 T60.0X4A to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About T60.0X4AOverview
Is T60.0X4A a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report toxic effect of organophosphate and carbamate insecticides, undetermined, initial encounter on HIPAA-covered claims from October 1, 2025 through September 30, 2026.
What does the 7th character A in T60.0X4A mean?
The final character A marks the initial encounter: use it while the patient is receiving active treatment for toxic effect of organophosphate and carbamate insecticides, undetermined, such as an emergency visit or first evaluation.
What MS-DRG does T60.0X4A group to?
When toxic effect of organophosphate and carbamate 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 T60.0X4A?
Under the General Equivalence Mappings, toxic effect of organophosphate and carbamate insecticides, undetermined, initial encounter converts to ICD-9-CM 989.3 (tox eff organphos/carbam) 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.
