ICD-10-CM Tag List · Table of Drugs · FY 2026 287 Codes

2026 Undetermined Poisoning ICD-10-CM Codes ICD-10-CM

The FY 2026 dataset contains 287 undetermined poisoning codes across 30 code blocks. Undetermined poisoning codes apply when the intent of the poisoning cannot be established from the medical documentation: it is unclear whether the event was accidental, intentional, or assault-related. Each code below lists the substances that map to it in the Table of Drugs and Chemicals.

✓ Built from the official CMS FY 2026 datasetEffective Oct 1, 2025 – Sep 30, 2026
287
Codes
30
Code Blocks
0
Billable
FY 2026
Dataset

Coding Guidance

Use undetermined intent only when the record genuinely cannot support a determination. If the documentation states no intent at all, ICD-10-CM guidelines default to accidental. No additional external cause code is required.

ICD-10-CM

All Undetermined Poisoning Codes 287 codes · searchable by substance

287 of 287 shown

Poisoning by, adverse effect of and underdosing of systemic antibiotics T36 · 11 codes

  • T36.0X4 Poisoning by penicillins, undeterminedNon-billable header
  • T36.1X4 Poisoning by cephalosporins and other beta-lactam antibiotics, undeterminedNon-billable header
  • T36.2X4 Poisoning by chloramphenicol group, undeterminedNon-billable header
  • T36.3X4 Poisoning by macrolides, undeterminedNon-billable header
  • T36.4X4 Poisoning by tetracyclines, undeterminedNon-billable header
  • T36.5X4 Poisoning by aminoglycosides, undeterminedNon-billable header
  • T36.6X4 Poisoning by rifampicins, undeterminedNon-billable header
  • T36.7X4 Poisoning by antifungal antibiotics, systemically used, undeterminedNon-billable header
  • T36.8X4 Poisoning by other systemic antibiotics, undeterminedNon-billable header
  • T36.94 Poisoning by unspecified systemic antibiotic, undeterminedNon-billable header
  • T36.AX4 Poisoning by fluoroquinolone antibiotics, undeterminedNon-billable header

Poisoning by, adverse effect of and underdosing of other systemic anti-infectives and antiparasitics T37 · 8 codes

  • T37.0X4 Poisoning by sulfonamides, undeterminedNon-billable header
  • T37.1X4 Poisoning by antimycobacterial drugs, undeterminedNon-billable header
  • T37.2X4 Poisoning by antimalarials and drugs acting on other blood protozoa, undeterminedNon-billable header
  • T37.3X4 Poisoning by other antiprotozoal drugs, undeterminedNon-billable header
  • T37.4X4 Poisoning by anthelminthics, undeterminedNon-billable header
  • T37.5X4 Poisoning by antiviral drugs, undeterminedNon-billable header
  • T37.8X4 Poisoning by other specified systemic anti-infectives and antiparasitics, undeterminedNon-billable header
  • T37.94 Poisoning by unspecified systemic anti-infective and antiparasitics, undeterminedNon-billable header

Poisoning by, adverse effect of and underdosing of hormones and their synthetic substitutes and antagonists, not elsewhere classified T38 · 13 codes

  • T38.0X4 Poisoning by glucocorticoids and synthetic analogues, undeterminedNon-billable header
  • T38.1X4 Poisoning by thyroid hormones and substitutes, undeterminedNon-billable header
  • T38.2X4 Poisoning by antithyroid drugs, undeterminedNon-billable header
  • T38.3X4 Poisoning by insulin and oral hypoglycemic [antidiabetic] drugs, undeterminedNon-billable header
  • T38.4X4 Poisoning by oral contraceptives, undeterminedNon-billable header
  • T38.5X4 Poisoning by other estrogens and progestogens, undeterminedNon-billable header
  • T38.6X4 Poisoning by antigonadotrophins, antiestrogens, antiandrogens, not elsewhere classified, undeterminedNon-billable header
  • T38.7X4 Poisoning by androgens and anabolic congeners, undeterminedNon-billable header
  • T38.804 Poisoning by unspecified hormones and synthetic substitutes, undeterminedNon-billable header
  • T38.814 Poisoning by anterior pituitary [adenohypophyseal] hormones, undeterminedNon-billable header
  • T38.894 Poisoning by other hormones and synthetic substitutes, undeterminedNon-billable header
  • T38.904 Poisoning by unspecified hormone antagonists, undeterminedNon-billable header
  • T38.994 Poisoning by other hormone antagonists, undeterminedNon-billable header

Poisoning by, adverse effect of and underdosing of nonopioid analgesics, antipyretics and antirheumatics T39 · 9 codes

  • T39.014 Poisoning by aspirin, undeterminedNon-billable header
  • T39.094 Poisoning by salicylates, undeterminedNon-billable header
  • T39.1X4 Poisoning by 4-Aminophenol derivatives, undeterminedNon-billable header
  • T39.2X4 Poisoning by pyrazolone derivatives, undeterminedNon-billable header
  • T39.314 Poisoning by propionic acid derivatives, undeterminedNon-billable header
  • T39.394 Poisoning by other nonsteroidal anti-inflammatory drugs [NSAID], undeterminedNon-billable header
  • T39.4X4 Poisoning by antirheumatics, not elsewhere classified, undeterminedNon-billable header
  • T39.8X4 Poisoning by other nonopioid analgesics and antipyretics, not elsewhere classified, undeterminedNon-billable header
  • T39.94 Poisoning by unspecified nonopioid analgesic, antipyretic and antirheumatic, undeterminedNon-billable header

Poisoning by, adverse effect of and underdosing of narcotics and psychodysleptics [hallucinogens] T40 · 14 codes

  • T40.0X4 Poisoning by opium, undeterminedNon-billable header
  • T40.1X4 Poisoning by heroin, undeterminedNon-billable header
  • T40.2X4 Poisoning by other opioids, undeterminedNon-billable header
  • T40.3X4 Poisoning by methadone, undeterminedNon-billable header
  • T40.414 Poisoning by fentanyl or fentanyl analogs, undeterminedNon-billable header
  • T40.424 Poisoning by tramadol, undeterminedNon-billable header
  • T40.494 Poisoning by other synthetic narcotics, undeterminedNon-billable header
  • T40.5X4 Poisoning by cocaine, undeterminedNon-billable header
  • T40.604 Poisoning by unspecified narcotics, undeterminedNon-billable header
  • T40.714 Poisoning by cannabis, undeterminedNon-billable header
  • T40.724 Poisoning by synthetic cannabinoids, undeterminedNon-billable header
  • T40.8X4 Poisoning by lysergide [LSD], undeterminedNon-billable header
  • T40.904 Poisoning by unspecified psychodysleptics [hallucinogens], undeterminedNon-billable header
  • T40.994 Poisoning by other psychodysleptics [hallucinogens], undeterminedNon-billable header

Poisoning by, adverse effect of and underdosing of anesthetics and therapeutic gases T41 · 7 codes

  • T41.0X4 Poisoning by inhaled anesthetics, undeterminedNon-billable header
  • T41.1X4 Poisoning by intravenous anesthetics, undeterminedNon-billable header
  • T41.204 Poisoning by unspecified general anesthetics, undeterminedNon-billable header
  • T41.294 Poisoning by other general anesthetics, undeterminedNon-billable header
  • T41.3X4 Poisoning by local anesthetics, undeterminedNon-billable header
  • T41.44 Poisoning by unspecified anesthetic, undeterminedNon-billable header
  • T41.5X4 Poisoning by therapeutic gases, undeterminedNon-billable header

Poisoning by, adverse effect of and underdosing of antiepileptic, sedative- hypnotic and antiparkinsonism drugs T42 · 8 codes

  • T42.0X4 Poisoning by hydantoin derivatives, undeterminedNon-billable header
  • T42.1X4 Poisoning by iminostilbenes, undeterminedNon-billable header
  • T42.2X4 Poisoning by succinimides and oxazolidinediones, undeterminedNon-billable header
  • T42.3X4 Poisoning by barbiturates, undeterminedNon-billable header
  • T42.4X4 Poisoning by benzodiazepines, undeterminedNon-billable header
  • T42.6X4 Poisoning by other antiepileptic and sedative-hypnotic drugs, undeterminedNon-billable header
  • T42.74 Poisoning by unspecified antiepileptic and sedative-hypnotic drugs, undeterminedNon-billable header
  • T42.8X4 Poisoning by antiparkinsonism drugs and other central muscle-tone depressants, undeterminedNon-billable header

Poisoning by, adverse effect of and underdosing of psychotropic drugs, not elsewhere classified T43 · 20 codes

  • T43.014 Poisoning by tricyclic antidepressants, undeterminedNon-billable header
  • T43.024 Poisoning by tetracyclic antidepressants, undeterminedNon-billable header
  • T43.1X4 Poisoning by monoamine-oxidase-inhibitor antidepressants, undeterminedNon-billable header
  • T43.204 Poisoning by unspecified antidepressants, undeterminedNon-billable header
  • T43.214 Poisoning by selective serotonin and norepinephrine reuptake inhibitors, undeterminedNon-billable header
  • T43.224 Poisoning by selective serotonin reuptake inhibitors, undeterminedNon-billable header
  • T43.294 Poisoning by other antidepressants, undeterminedNon-billable header
  • T43.3X4 Poisoning by phenothiazine antipsychotics and neuroleptics, undeterminedNon-billable header
  • T43.4X4 Poisoning by butyrophenone and thiothixene neuroleptics, undeterminedNon-billable header
  • T43.504 Poisoning by unspecified antipsychotics and neuroleptics, undeterminedNon-billable header
  • T43.594 Poisoning by other antipsychotics and neuroleptics, undeterminedNon-billable header
  • T43.604 Poisoning by unspecified psychostimulants, undeterminedNon-billable header
  • T43.614 Poisoning by caffeine, undeterminedNon-billable header
  • T43.624 Poisoning by amphetamines, undeterminedNon-billable header
  • T43.634 Poisoning by methylphenidate, undeterminedNon-billable header
  • T43.644 Poisoning by ecstasy, undeterminedNon-billable header
  • T43.654 Poisoning by methamphetamines, undeterminedNon-billable header
  • T43.694 Poisoning by other psychostimulants, undeterminedNon-billable header
  • T43.8X4 Poisoning by other psychotropic drugs, undeterminedNon-billable header
  • T43.94 Poisoning by unspecified psychotropic drug, undeterminedNon-billable header

Poisoning by, adverse effect of and underdosing of drugs primarily affecting the autonomic nervous system T44 · 11 codes

  • T44.0X4 Poisoning by anticholinesterase agents, undeterminedNon-billable header
  • T44.1X4 Poisoning by other parasympathomimetics [cholinergics], undeterminedNon-billable header
  • T44.2X4 Poisoning by ganglionic blocking drugs, undeterminedNon-billable header
  • T44.3X4 Poisoning by other parasympatholytics [anticholinergics and antimuscarinics] and spasmolytics, undeterminedNon-billable header
  • T44.4X4 Poisoning by predominantly alpha-adrenoreceptor agonists, undeterminedNon-billable header
  • T44.5X4 Poisoning by predominantly beta-adrenoreceptor agonists, undeterminedNon-billable header
  • T44.6X4 Poisoning by alpha-adrenoreceptor antagonists, undeterminedNon-billable header
  • T44.7X4 Poisoning by beta-adrenoreceptor antagonists, undeterminedNon-billable header
  • T44.8X4 Poisoning by centrally-acting and adrenergic-neuron-blocking agents, undeterminedNon-billable header
  • T44.904 Poisoning by unspecified drugs primarily affecting the autonomic nervous system, undeterminedNon-billable header
  • T44.994 Poisoning by other drug primarily affecting the autonomic nervous system, undeterminedNon-billable header

Poisoning by, adverse effect of and underdosing of primarily systemic and hematological agents, not elsewhere classified T45 · 15 codes

  • T45.0X4 Poisoning by antiallergic and antiemetic drugs, undeterminedNon-billable header
  • T45.1X4 Poisoning by antineoplastic and immunosuppressive drugs, undeterminedNon-billable header
  • T45.2X4 Poisoning by vitamins, undeterminedNon-billable header
  • T45.3X4 Poisoning by enzymes, undeterminedNon-billable header
  • T45.4X4 Poisoning by iron and its compounds, undeterminedNon-billable header
  • T45.514 Poisoning by anticoagulants, undeterminedNon-billable header
  • T45.524 Poisoning by antithrombotic drugs, undeterminedNon-billable header
  • T45.604 Poisoning by unspecified fibrinolysis-affecting drugs, undeterminedNon-billable header
  • T45.614 Poisoning by thrombolytic drug, undeterminedNon-billable header
  • T45.624 Poisoning by hemostatic drug, undeterminedNon-billable header
  • T45.694 Poisoning by other fibrinolysis-affecting drugs, undeterminedNon-billable header
  • T45.7X4 Poisoning by anticoagulant antagonists, vitamin K and other coagulants, undeterminedNon-billable header
  • T45.8X4 Poisoning by other primarily systemic and hematological agents, undeterminedNon-billable header
  • T45.94 Poisoning by unspecified primarily systemic and hematological agent, undeterminedNon-billable header
  • T45.AX4 Poisoning by immune checkpoint inhibitors and immunostimulant drugs, undeterminedNon-billable header

Poisoning by, adverse effect of and underdosing of agents primarily affecting the cardiovascular system T46 · 11 codes

  • T46.0X4 Poisoning by cardiac-stimulant glycosides and drugs of similar action, undeterminedNon-billable header
  • T46.1X4 Poisoning by calcium-channel blockers, undeterminedNon-billable header
  • T46.2X4 Poisoning by other antidysrhythmic drugs, undeterminedNon-billable header
  • T46.3X4 Poisoning by coronary vasodilators, undeterminedNon-billable header
  • T46.4X4 Poisoning by angiotensin-converting-enzyme inhibitors, undeterminedNon-billable header
  • T46.5X4 Poisoning by other antihypertensive drugs, undeterminedNon-billable header
  • T46.6X4 Poisoning by antihyperlipidemic and antiarteriosclerotic drugs, undeterminedNon-billable header
  • T46.7X4 Poisoning by peripheral vasodilators, undeterminedNon-billable header
  • T46.8X4 Poisoning by antivaricose drugs, including sclerosing agents, undeterminedNon-billable header
  • T46.904 Poisoning by unspecified agents primarily affecting the cardiovascular system, undeterminedNon-billable header
  • T46.994 Poisoning by other agents primarily affecting the cardiovascular system, undeterminedNon-billable header

Poisoning by, adverse effect of and underdosing of agents primarily affecting the gastrointestinal system T47 · 10 codes

  • T47.0X4 Poisoning by histamine H2-receptor blockers, undeterminedNon-billable header
  • T47.1X4 Poisoning by other antacids and anti-gastric-secretion drugs, undeterminedNon-billable header
  • T47.2X4 Poisoning by stimulant laxatives, undeterminedNon-billable header
  • T47.3X4 Poisoning by saline and osmotic laxatives, undeterminedNon-billable header
  • T47.4X4 Poisoning by other laxatives, undeterminedNon-billable header
  • T47.5X4 Poisoning by digestants, undeterminedNon-billable header
  • T47.6X4 Poisoning by antidiarrheal drugs, undeterminedNon-billable header
  • T47.7X4 Poisoning by emetics, undeterminedNon-billable header
  • T47.8X4 Poisoning by other agents primarily affecting gastrointestinal system, undeterminedNon-billable header
  • T47.94 Poisoning by unspecified agents primarily affecting the gastrointestinal system, undeterminedNon-billable header

Poisoning by, adverse effect of and underdosing of agents primarily acting on smooth and skeletal muscles and the respiratory system T48 · 9 codes

  • T48.0X4 Poisoning by oxytocic drugs, undeterminedNon-billable header
  • T48.1X4 Poisoning by skeletal muscle relaxants [neuromuscular blocking agents], undeterminedNon-billable header
  • T48.204 Poisoning by unspecified drugs acting on muscles, undeterminedNon-billable header
  • T48.294 Poisoning by other drugs acting on muscles, undeterminedNon-billable header
  • T48.3X4 Poisoning by antitussives, undeterminedNon-billable header
  • T48.4X4 Poisoning by expectorants, undeterminedNon-billable header
  • T48.5X4 Poisoning by other anti-common-cold drugs, undeterminedNon-billable header
  • T48.6X4 Poisoning by antiasthmatics, undeterminedNon-billable header
  • T48.904 Poisoning by unspecified agents primarily acting on the respiratory system, undeterminedNon-billable header

Poisoning by, adverse effect of and underdosing of topical agents primarily affecting skin and mucous membrane and by ophthalmological, otorhinorlaryngological and dental drugs T49 · 10 codes

  • T49.0X4 Poisoning by local antifungal, anti-infective and anti-inflammatory drugs, undeterminedNon-billable header
  • T49.1X4 Poisoning by antipruritics, undeterminedNon-billable header
  • T49.2X4 Poisoning by local astringents and local detergents, undeterminedNon-billable header
  • T49.3X4 Poisoning by emollients, demulcents and protectants, undeterminedNon-billable header
  • T49.4X4 Poisoning by keratolytics, keratoplastics, and other hair treatment drugs and preparations, undeterminedNon-billable header
  • T49.5X4 Poisoning by ophthalmological drugs and preparations, undeterminedNon-billable header
  • T49.6X4 Poisoning by otorhinolaryngological drugs and preparations, undeterminedNon-billable header
  • T49.7X4 Poisoning by dental drugs, topically applied, undeterminedNon-billable header
  • T49.8X4 Poisoning by other topical agents, undeterminedNon-billable header
  • T49.94 Poisoning by unspecified topical agent, undeterminedNon-billable header

Poisoning by, adverse effect of and underdosing of diuretics and other and unspecified drugs, medicaments and biological substances T50 · 18 codes

  • T50.0X4 Poisoning by mineralocorticoids and their antagonists, undeterminedNon-billable header
  • T50.1X4 Poisoning by loop [high-ceiling] diuretics, undeterminedNon-billable header
  • T50.2X4 Poisoning by carbonic-anhydrase inhibitors, benzothiadiazides and other diuretics, undeterminedNon-billable header
  • T50.3X4 Poisoning by electrolytic, caloric and water-balance agents, undeterminedNon-billable header
  • T50.4X4 Poisoning by drugs affecting uric acid metabolism, undeterminedNon-billable header
  • T50.5X4 Poisoning by appetite depressants, undeterminedNon-billable header
  • T50.6X4 Poisoning by antidotes and chelating agents, undeterminedNon-billable header
  • T50.7X4 Poisoning by analeptics and opioid receptor antagonists, undeterminedNon-billable header
  • T50.8X4 Poisoning by diagnostic agents, undeterminedNon-billable header
  • T50.904 Poisoning by unspecified drugs, medicaments and biological substances, undeterminedNon-billable header
  • T50.914 Poisoning by multiple unspecified drugs, medicaments and biological substances, undeterminedNon-billable header
  • T50.994 Poisoning by other drugs, medicaments and biological substances, undeterminedNon-billable header
  • T50.A24 Poisoning by mixed bacterial vaccines without a pertussis component, undeterminedNon-billable header
  • T50.A94 Poisoning by other bacterial vaccines, undeterminedNon-billable header
  • T50.B14 Poisoning by smallpox vaccines, undeterminedNon-billable header
  • T50.B94 Poisoning by other viral vaccines, undeterminedNon-billable header
  • T50.Z14 Poisoning by immunoglobulin, undeterminedNon-billable header
  • T50.Z94 Poisoning by other vaccines and biological substances, undeterminedNon-billable header

Toxic effect of alcohol T51 · 6 codes

  • T51.0X4 Toxic effect of ethanol, undeterminedNon-billable header
  • T51.1X4 Toxic effect of methanol, undeterminedNon-billable header
  • T51.2X4 Toxic effect of 2-Propanol, undeterminedNon-billable header
  • T51.3X4 Toxic effect of fusel oil, undeterminedNon-billable header
  • T51.8X4 Toxic effect of other alcohols, undeterminedNon-billable header
  • T51.94 Toxic effect of unspecified alcohol, undeterminedNon-billable header

Toxic effect of organic solvents T52 · 7 codes

  • T52.0X4 Toxic effect of petroleum products, undeterminedNon-billable header
  • T52.1X4 Toxic effect of benzene, undeterminedNon-billable header
  • T52.2X4 Toxic effect of homologues of benzene, undeterminedNon-billable header
  • T52.3X4 Toxic effect of glycols, undeterminedNon-billable header
  • T52.4X4 Toxic effect of ketones, undeterminedNon-billable header
  • T52.8X4 Toxic effect of other organic solvents, undeterminedNon-billable header
  • T52.94 Toxic effect of unspecified organic solvent, undeterminedNon-billable header

Toxic effect of halogen derivatives of aliphatic and aromatic hydrocarbons T53 · 7 codes

  • T53.1X4 Toxic effect of chloroform, undeterminedNon-billable header
  • T53.2X4 Toxic effect of trichloroethylene, undeterminedNon-billable header
  • T53.3X4 Toxic effect of tetrachloroethylene, undeterminedNon-billable header
  • T53.4X4 Toxic effect of dichloromethane, undeterminedNon-billable header
  • T53.5X4 Toxic effect of chlorofluorocarbons, undeterminedNon-billable header
  • T53.6X4 Toxic effect of other halogen derivatives of aliphatic hydrocarbons, undeterminedNon-billable header
  • T53.7X4 Toxic effect of other halogen derivatives of aromatic hydrocarbons, undeterminedNon-billable header

Toxic effect of corrosive substances T54 · 5 codes

  • T54.0X4 Toxic effect of phenol and phenol homologues, undeterminedNon-billable header
  • T54.1X4 Toxic effect of other corrosive organic compounds, undeterminedNon-billable header
  • T54.2X4 Toxic effect of corrosive acids and acid-like substances, undeterminedNon-billable header
  • T54.3X4 Toxic effect of corrosive alkalis and alkali-like substances, undeterminedNon-billable header
  • T54.94 Toxic effect of unspecified corrosive substance, undeterminedNon-billable header

Toxic effect of soaps and detergents T55 · 1 codes

  • T55.0X4 Toxic effect of soaps, undeterminedNon-billable header

Toxic effect of metals T56 · 12 codes

  • T56.0X4 Toxic effect of lead and its compounds, undeterminedNon-billable header
  • T56.1X4 Toxic effect of mercury and its compounds, undeterminedNon-billable header
  • T56.2X4 Toxic effect of chromium and its compounds, undeterminedNon-billable header
  • T56.3X4 Toxic effect of cadmium and its compounds, undeterminedNon-billable header
  • T56.4X4 Toxic effect of copper and its compounds, undeterminedNon-billable header
  • T56.5X4 Toxic effect of zinc and its compounds, undeterminedNon-billable header
  • T56.6X4 Toxic effect of tin and its compounds, undeterminedNon-billable header
  • T56.7X4 Toxic effect of beryllium and its compounds, undeterminedNon-billable header
  • T56.814 Toxic effect of thallium, undeterminedNon-billable header
  • T56.824 Toxic effect of gadolinium, undeterminedNon-billable header
  • T56.894 Toxic effect of other metals, undeterminedNon-billable header
  • T56.94 Toxic effect of unspecified metal, undeterminedNon-billable header

Toxic effect of other inorganic substances T57 · 6 codes

  • T57.0X4 Toxic effect of arsenic and its compounds, undeterminedNon-billable header
  • T57.1X4 Toxic effect of phosphorus and its compounds, undeterminedNon-billable header
  • T57.2X4 Toxic effect of manganese and its compounds, undeterminedNon-billable header
  • T57.3X4 Toxic effect of hydrogen cyanide, undeterminedNon-billable header
  • T57.8X4 Toxic effect of other specified inorganic substances, undeterminedNon-billable header
  • T57.94 Toxic effect of unspecified inorganic substance, undeterminedNon-billable header

Toxic effect of carbon monoxide T58 · 4 codes

  • T58.04 Toxic effect of carbon monoxide from motor vehicle exhaust, undeterminedNon-billable header
  • T58.14 Toxic effect of carbon monoxide from utility gas, undeterminedNon-billable header
  • T58.2X4 Toxic effect of carbon monoxide from incomplete combustion of other domestic fuels, undeterminedNon-billable header
  • T58.8X4 Toxic effect of carbon monoxide from other source, undeterminedNon-billable header

Toxic effect of other gases, fumes and vapors T59 · 11 codes

  • T59.0X4 Toxic effect of nitrogen oxides, undeterminedNon-billable header
  • T59.1X4 Toxic effect of sulfur dioxide, undeterminedNon-billable header
  • T59.2X4 Toxic effect of formaldehyde, undeterminedNon-billable header
  • T59.3X4 Toxic effect of lacrimogenic gas, undeterminedNon-billable header
  • T59.4X4 Toxic effect of chlorine gas, undeterminedNon-billable header
  • T59.5X4 Toxic effect of fluorine gas and hydrogen fluoride, undeterminedNon-billable header
  • T59.6X4 Toxic effect of hydrogen sulfide, undeterminedNon-billable header
  • T59.7X4 Toxic effect of carbon dioxide, undeterminedNon-billable header
  • T59.814 Toxic effect of smoke, undeterminedNon-billable header
  • T59.894 Toxic effect of other specified gases, fumes and vapors, undeterminedNon-billable header
  • T59.94 Toxic effect of unspecified gases, fumes and vapors, undeterminedNon-billable header

Toxic effect of pesticides T60 · 7 codes

  • T60.0X4 Toxic effect of organophosphate and carbamate insecticides, undeterminedNon-billable header
  • T60.1X4 Toxic effect of halogenated insecticides, undeterminedNon-billable header
  • T60.2X4 Toxic effect of other insecticides, undeterminedNon-billable header
  • T60.3X4 Toxic effect of herbicides and fungicides, undeterminedNon-billable header
  • T60.4X4 Toxic effect of rodenticides, undeterminedNon-billable header
  • T60.8X4 Toxic effect of other pesticides, undeterminedNon-billable header
  • T60.94 Toxic effect of unspecified pesticide, undeterminedNon-billable header

Toxic effect of noxious substances eaten as seafood T61 · 5 codes

  • T61.04 Ciguatera fish poisoning, undeterminedNon-billable header
  • T61.14 Scombroid fish poisoning, undeterminedNon-billable header
  • T61.774 Other fish poisoning, undeterminedNon-billable header
  • T61.784 Other shellfish poisoning, undeterminedNon-billable header
  • T61.94 Toxic effect of unspecified seafood, undeterminedNon-billable header

Toxic effect of other noxious substances eaten as food T62 · 5 codes

  • T62.0X4 Toxic effect of ingested mushrooms, undeterminedNon-billable header
  • T62.1X4 Toxic effect of ingested berries, undeterminedNon-billable header
  • T62.2X4 Toxic effect of other ingested (parts of) plant(s), undeterminedNon-billable header
  • T62.8X4 Toxic effect of other specified noxious substances eaten as food, undeterminedNon-billable header
  • T62.94 Toxic effect of unspecified noxious substance eaten as food, undeterminedNon-billable header

Toxic effect of contact with venomous animals and plants T63 · 21 codes

  • T63.004 Toxic effect of unspecified snake venom, undeterminedNon-billable header
  • T63.014 Toxic effect of rattlesnake venom, undeterminedNon-billable header
  • T63.044 Toxic effect of cobra venom, undeterminedNon-billable header
  • T63.064 Toxic effect of venom of other North and South American snake, undeterminedNon-billable header
  • T63.094 Toxic effect of venom of other snake, undeterminedNon-billable header
  • T63.114 Toxic effect of venom of gila monster, undeterminedNon-billable header
  • T63.124 Toxic effect of venom of other venomous lizard, undeterminedNon-billable header
  • T63.324 Toxic effect of venom of tarantula, undeterminedNon-billable header
  • T63.334 Toxic effect of venom of brown recluse spider, undeterminedNon-billable header
  • T63.394 Toxic effect of venom of other spider, undeterminedNon-billable header
  • T63.414 Toxic effect of venom of centipedes and venomous millipedes, undeterminedNon-billable header
  • T63.424 Toxic effect of venom of ants, undeterminedNon-billable header
  • T63.434 Toxic effect of venom of caterpillars, undeterminedNon-billable header
  • T63.444 Toxic effect of venom of bees, undeterminedNon-billable header
  • T63.454 Toxic effect of venom of hornets, undeterminedNon-billable header
  • T63.464 Toxic effect of venom of wasps, undeterminedNon-billable header
  • T63.484 Toxic effect of venom of other arthropod, undeterminedNon-billable header
  • T63.624 Toxic effect of contact with other jellyfish, undeterminedNon-billable header
  • T63.634 Toxic effect of contact with sea anemone, undeterminedNon-billable header
  • T63.694 Toxic effect of contact with other venomous marine animals, undeterminedNon-billable header
  • T63.94 Toxic effect of contact with unspecified venomous animal, undeterminedNon-billable header

Toxic effect of aflatoxin and other mycotoxin food contaminants T64 · 2 codes

  • T64.04 Toxic effect of aflatoxin, undeterminedNon-billable header
  • T64.84 Toxic effect of other mycotoxin food contaminants, undeterminedNon-billable header

Toxic effect of other and unspecified substances T65 · 14 codes

  • T65.0X4 Toxic effect of cyanides, undeterminedNon-billable header
  • T65.1X4 Toxic effect of strychnine and its salts, undeterminedNon-billable header
  • T65.214 Toxic effect of chewing tobacco, undeterminedNon-billable header
  • T65.224 Toxic effect of tobacco cigarettes, undeterminedNon-billable header
  • T65.294 Toxic effect of other tobacco and nicotine, undeterminedNon-billable header
  • T65.3X4 Toxic effect of nitroderivatives and aminoderivatives of benzene and its homologues, undeterminedNon-billable header
  • T65.4X4 Toxic effect of carbon disulfide, undeterminedNon-billable header
  • T65.6X4 Toxic effect of paints and dyes, not elsewhere classified, undeterminedNon-billable header
  • T65.814 Toxic effect of latex, undeterminedNon-billable header
  • T65.824 Toxic effect of harmful algae and algae toxins, undeterminedNon-billable header
  • T65.834 Toxic effect of fiberglass, undeterminedNon-billable header
  • T65.844 Toxic effect of xylazine, undeterminedNon-billable header
  • T65.894 Toxic effect of other specified substances, undeterminedNon-billable header
  • T65.94 Toxic effect of unspecified substance, undeterminedNon-billable header

The info icon lists every substance from the table that maps to the code. The filter above searches those substances too.

Questions About This Page

How do I find the right code for a specific drug?

Type the substance into the filter above. Every code on this page carries its full substance list from the Table of Drugs and Chemicals. For the complete six-column table, use the Table of Drugs and Chemicals.

Do these codes need an external cause code?

No. Poisoning, adverse effect, and underdosing codes from the T36 to T65 range carry the intent inside the code itself, so no additional external cause code is reported with them.

What 7th character do these codes take?

A for the initial encounter during active treatment, D for subsequent encounters during recovery, and S for sequela when coding late effects.

How many undetermined poisoning codes are there?

The FY 2026 dataset contains 287 undetermined poisoning codes across 30 code blocks.

Related References

Source: official CMS FY 2026 ICD-10-CM release, effective October 1, 2025 through September 30, 2026.