2024 ICD-10-CM Table of Drugs and Chemicals starting with letter H

The 2024 Table of Drugs and Chemicals contains a classification of drugs, industrial solvents, corrosive gases, noxious plants, pesticides, and other toxic agents. Each substance in the table is assigned a code according to the poisoning classification and external causes of adverse effects. Use as many codes as necessary to describe all reported drugs, medicinal or chemical substances. Browse Table of Drugs and Chemicals by alphabetical order:

Substance Poisoning
Accidental
(unintentional)
Poisoning
Accidental
self-harm
Poisoning
Assault
Poisoning
Undetermined
Adverse
effect
Underdosing
HachimycinT36.7X1T36.7X2T36.7X3T36.7X4T36.7X5T36.7X6
HairT49.4X1T49.4X2T49.4X3T49.4X4T49.4X5T49.4X6
Hair
  »dye
T49.4X1T49.4X2T49.4X3T49.4X4T49.4X5T49.4X6
Hair
  »preparation NEC
T49.4X1T49.4X2T49.4X3T49.4X4T49.4X5T49.4X6
HalazepamT42.4X1T42.4X2T42.4X3T42.4X4T42.4X5T42.4X6
HalcinoloneT49.0X1T49.0X2T49.0X3T49.0X4T49.0X5T49.0X6
HalcinonideT49.0X1T49.0X2T49.0X3T49.0X4T49.0X5T49.0X6
HalethazoleT49.0X1T49.0X2T49.0X3T49.0X4T49.0X5T49.0X6
Hallucinogen NOST40.901T40.902T40.903T40.904T40.905T40.906
Hallucinogen NOS
  »specified NEC
T40.901T40.902T40.903T40.904T40.905T40.906
HalofantrineT37.2X1T37.2X2T37.2X3T37.2X4T37.2X5T37.2X6
HalofenateT46.6X1T46.6X2T46.6X3T46.6X4T46.6X5T46.6X6
HalometasoneT49.0X1T49.0X2T49.0X3T49.0X4T49.0X5T49.0X6
HaloperidolT43.4X1T43.4X2T43.4X3T43.4X4T43.4X5T43.4X6
HaloproginT49.0X1T49.0X2T49.0X3T49.0X4T49.0X5T49.0X6
HalotexT49.0X1T49.0X2T49.0X3T49.0X4T49.0X5T49.0X6
HalothaneT41.0X1T41.0X2T41.0X3T41.0X4T41.0X5T41.0X6
HaloxazolamT42.4X1T42.4X2T42.4X3T42.4X4T42.4X5T42.4X6
HalquinolsT49.0X1T49.0X2T49.0X3T49.0X4T49.0X5T49.0X6
HamamelisT49.2X1T49.2X2T49.2X3T49.2X4T49.2X5T49.2X6
HaptendextranT45.8X1T45.8X2T45.8X3T45.8X4T45.8X5T45.8X6
HarmonylT46.5X1T46.5X2T46.5X3T46.5X4T46.5X5T46.5X6
Hartmann's solutionT50.3X1T50.3X2T50.3X3T50.3X4T50.3X5T50.3X6
HashishT40.711T40.712T40.713T40.714T40.715T40.716
Hawaiian Woodrose seedsT40.991T40.992T40.993T40.994  
HCBT60.3X1T60.3X2T60.3X3T60.3X4  
HCHT53.6X1T53.6X2T53.6X3T53.6X4  
HCH
  »medicinal
T53.6X1T53.6X2T53.6X3T53.6X4  
HCNT57.3X1T57.3X2T57.3X3T57.3X4  
Headache cures, drugs, powders NECT50.901T50.902T50.903T50.904T50.905T50.906
Heavenly Blue (morning glory)T40.991T40.992T40.993T40.994  
Heavy metal antidoteT45.8X1T45.8X2T45.8X3T45.8X4T45.8X5T45.8X6
HedaquiniumT49.0X1T49.0X2T49.0X3T49.0X4T49.0X5T49.0X6
Hedge hyssopT62.2X1T62.2X2T62.2X3T62.2X4  
HeetT49.8X1T49.8X2T49.8X3T49.8X4T49.8X5T49.8X6
HeleninT37.4X1T37.4X2T37.4X3T37.4X4T37.4X5T37.4X6
Helium (nonmedicinal) NECT59.891T59.892T59.893T59.894  
Helium (nonmedicinal) NEC
  »medicinal
T59.891T59.892T59.893T59.894  
Hellebore (black) (green) (white)T62.2X1T62.2X2T62.2X3T62.2X4  
HematinT45.8X1T45.8X2T45.8X3T45.8X4T45.8X5T45.8X6
Hematinic preparationT45.8X1T45.8X2T45.8X3T45.8X4T45.8X5T45.8X6
Hematological agentT45.91T45.92T45.93T45.94T45.95T45.96
Hematological agent
  »specified NEC
T45.91T45.92T45.93T45.94T45.95T45.96
HemlockT62.2X1T62.2X2T62.2X3T62.2X4  
HemostaticT45.621T45.622T45.623T45.624T45.625T45.626
Hemostatic
  »drug, systemic
T45.621T45.622T45.623T45.624T45.625T45.626
HemostypticT49.4X1T49.4X2T49.4X3T49.4X4T49.4X5T49.4X6
HenbaneT62.2X1T62.2X2T62.2X3T62.2X4  
Heparin (sodium)T45.511T45.512T45.513T45.514T45.515T45.516
Heparin (sodium)
  »action reverser
T45.511T45.512T45.513T45.514T45.515T45.516
Heparin-fractionT45.511T45.512T45.513T45.514T45.515T45.516
Heparinoid (systemic)T45.511T45.512T45.513T45.514T45.515T45.516
Hepatic secretion stimulantT47.8X1T47.8X2T47.8X3T47.8X4T47.8X5T47.8X6
Hepatitis BT50.Z11T50.Z12T50.Z13T50.Z14T50.Z15T50.Z16
Hepatitis B
  »immune globulin
T50.Z11T50.Z12T50.Z13T50.Z14T50.Z15T50.Z16
Hepatitis B
  »vaccine
T50.Z11T50.Z12T50.Z13T50.Z14T50.Z15T50.Z16
HepronicateT46.7X1T46.7X2T46.7X3T46.7X4T46.7X5T46.7X6
HeptabarbT42.3X1T42.3X2T42.3X3T42.3X4T42.3X5T42.3X6
HeptabarbitalT42.3X1T42.3X2T42.3X3T42.3X4T42.3X5T42.3X6
HeptabarbitoneT42.3X1T42.3X2T42.3X3T42.3X4T42.3X5T42.3X6
HeptachlorT60.1X1T60.1X2T60.1X3T60.1X4  
HeptalginT40.2X1T40.2X2T40.2X3T40.2X4T40.2X5T40.2X6
HeptaminolT46.3X1T46.3X2T46.3X3T46.3X4T46.3X5T46.3X6
Herbicide NECT60.3X1T60.3X2T60.3X3T60.3X4  
HeroinT40.1X1T40.1X2T40.1X3T40.1X4  
HerplexT49.5X1T49.5X2T49.5X3T49.5X4T49.5X5T49.5X6
HEST45.8X1T45.8X2T45.8X3T45.8X4T45.8X5T45.8X6
HesperidinT46.991T46.992T46.993T46.994T46.995T46.996
HetacillinT36.0X1T36.0X2T36.0X3T36.0X4T36.0X5T36.0X6
HetastarchT45.8X1T45.8X2T45.8X3T45.8X4T45.8X5T45.8X6
HETPT60.0X1T60.0X2T60.0X3T60.0X4  
Hexachlorobenzene (vapor)T60.3X1T60.3X2T60.3X3T60.3X4  
HexachlorocyclohexaneT53.6X1T53.6X2T53.6X3T53.6X4  
HexachloropheneT49.0X1T49.0X2T49.0X3T49.0X4T49.0X5T49.0X6
HexadilineT46.3X1T46.3X2T46.3X3T46.3X4T46.3X5T46.3X6
Hexadimethrine (bromide)T45.7X1T45.7X2T45.7X3T45.7X4T45.7X5T45.7X6
HexadylamineT46.3X1T46.3X2T46.3X3T46.3X4T46.3X5T46.3X6
Hexaethyl tetraphos-phateT60.0X1T60.0X2T60.0X3T60.0X4  
Hexafluorenium bromideT48.1X1T48.1X2T48.1X3T48.1X4T48.1X5T48.1X6
Hexafluronium (bromide)T48.1X1T48.1X2T48.1X3T48.1X4T48.1X5T48.1X6
Hexa-germT49.2X1T49.2X2T49.2X3T49.2X4T49.2X5T49.2X6
HexahydrobenzolT52.8X1T52.8X2T52.8X3T52.8X4  
Hexahydrocresol (s)T51.8X1T51.8X2T51.8X3T51.8X4  
Hexahydrocresol (s)
  »arsenide
T51.8X1T51.8X2T51.8X3T51.8X4  
Hexahydrocresol (s)
  »arseniurated
T51.8X1T51.8X2T51.8X3T51.8X4  
Hexahydrocresol (s)
  »cyanide
T51.8X1T51.8X2T51.8X3T51.8X4  
Hexahydrocresol (s)
  »cyanide
    »gas
T51.8X1T51.8X2T51.8X3T51.8X4  
Hexahydrocresol (s)
  »Fluoride (liquid)
T51.8X1T51.8X2T51.8X3T51.8X4  
Hexahydrocresol (s)
  »Fluoride (liquid)
    »vapor
T51.8X1T51.8X2T51.8X3T51.8X4  
Hexahydrocresol (s)
  »phophorated
T51.8X1T51.8X2T51.8X3T51.8X4  
Hexahydrocresol (s)
  »sulfate
T51.8X1T51.8X2T51.8X3T51.8X4  
Hexahydrocresol (s)
  »sulfide (gas)
T51.8X1T51.8X2T51.8X3T51.8X4  
Hexahydrocresol (s)
  »sulfide (gas)
    »arseniurated
T51.8X1T51.8X2T51.8X3T51.8X4  
Hexahydrocresol (s)
  »sulfurated
T51.8X1T51.8X2T51.8X3T51.8X4  
HexahydrophenolT51.8X1T51.8X2T51.8X3T51.8X4  
HexalenT51.8X1T51.8X2T51.8X3T51.8X4  
Hexamethonium bromideT44.2X1T44.2X2T44.2X3T44.2X4T44.2X5T44.2X6
HexamethyleneT52.8X1T52.8X2T52.8X3T52.8X4  
HexamethylmelamineT45.1X1T45.1X2T45.1X3T45.1X4T45.1X5T45.1X6
HexamidineT49.0X1T49.0X2T49.0X3T49.0X4T49.0X5T49.0X6
Hexamine (mandelate)T37.8X1T37.8X2T37.8X3T37.8X4T37.8X5T37.8X6
Hexanone, 2-hexanoneT52.4X1T52.4X2T52.4X3T52.4X4  
HexanuoreniumT48.1X1T48.1X2T48.1X3T48.1X4T48.1X5T48.1X6
HexapropymateT42.6X1T42.6X2T42.6X3T42.6X4T42.6X5T42.6X6
Hexasonium iodideT44.3X1T44.3X2T44.3X3T44.3X4T44.3X5T44.3X6
Hexcarbacholine bromideT48.1X1T48.1X2T48.1X3T48.1X4T48.1X5T48.1X6
HexemalT42.3X1T42.3X2T42.3X3T42.3X4T42.3X5T42.3X6
HexestrolT38.5X1T38.5X2T38.5X3T38.5X4T38.5X5T38.5X6
Hexethal (sodium)T42.3X1T42.3X2T42.3X3T42.3X4T42.3X5T42.3X6
HexetidineT37.8X1T37.8X2T37.8X3T37.8X4T37.8X5T37.8X6
HexobarbitalT42.3X1T42.3X2T42.3X3T42.3X4T42.3X5T42.3X6
Hexobarbital
  »rectal
T42.3X1T42.3X2T42.3X3T42.3X4T42.3X5T42.3X6
Hexobarbital
  »sodium
T42.3X1T42.3X2T42.3X3T42.3X4T42.3X5T42.3X6
HexobendineT46.3X1T46.3X2T46.3X3T46.3X4T46.3X5T46.3X6
HexocycliumT44.3X1T44.3X2T44.3X3T44.3X4T44.3X5T44.3X6
Hexocyclium
  »metilsulfate
T44.3X1T44.3X2T44.3X3T44.3X4T44.3X5T44.3X6
HexoestrolT38.5X1T38.5X2T38.5X3T38.5X4T38.5X5T38.5X6
HexoneT52.4X1T52.4X2T52.4X3T52.4X4  
HexoprenalineT48.6X1T48.6X2T48.6X3T48.6X4T48.6X5T48.6X6
HexylcaineT41.3X1T41.3X2T41.3X3T41.3X4T41.3X5T41.3X6
HexylresorcinolT52.2X1T52.2X2T52.2X3T52.2X4  
HGH (human growth hormone)T38.811T38.812T38.813T38.814T38.815T38.816
Hinkle's pillsT47.2X1T47.2X2T47.2X3T47.2X4T47.2X5T47.2X6
HistalogT50.8X1T50.8X2T50.8X3T50.8X4T50.8X5T50.8X6
Histamine (phosphate)T50.8X1T50.8X2T50.8X3T50.8X4T50.8X5T50.8X6
HistoplasminT50.8X1T50.8X2T50.8X3T50.8X4T50.8X5T50.8X6
Holly berriesT62.2X1T62.2X2T62.2X3T62.2X4  
HomatropineT44.3X1T44.3X2T44.3X3T44.3X4T44.3X5T44.3X6
Homatropine
  »methylbromide
T44.3X1T44.3X2T44.3X3T44.3X4T44.3X5T44.3X6
HomochlorcyclizineT45.0X1T45.0X2T45.0X3T45.0X4T45.0X5T45.0X6
HomosalateT49.3X1T49.3X2T49.3X3T49.3X4T49.3X5T49.3X6
Homo-tetT50.Z11T50.Z12T50.Z13T50.Z14T50.Z15T50.Z16
HormoneT38.801T38.802T38.803T38.804T38.805T38.806
Hormone
  »adrenal cortical steroids
T38.801T38.802T38.803T38.804T38.805T38.806
Hormone
  »androgenic
T38.801T38.802T38.803T38.804T38.805T38.806
Hormone
  »anterior pituitary NEC
T38.801T38.802T38.803T38.804T38.805T38.806
Hormone
  »antidiabetic agents
T38.801T38.802T38.803T38.804T38.805T38.806
Hormone
  »antidiuretic
T38.801T38.802T38.803T38.804T38.805T38.806
Hormone
  »cancer therapy
T38.801T38.802T38.803T38.804T38.805T38.806
Hormone
  »follicle stimulating
T38.801T38.802T38.803T38.804T38.805T38.806
Hormone
  »gonadotropic
T38.801T38.802T38.803T38.804T38.805T38.806
Hormone
  »gonadotropic
    »pituitary
T38.801T38.802T38.803T38.804T38.805T38.806
Hormone
  »growth
T38.801T38.802T38.803T38.804T38.805T38.806
Hormone
  »luteinizing
T38.801T38.802T38.803T38.804T38.805T38.806
Hormone
  »ovarian
T38.801T38.802T38.803T38.804T38.805T38.806
Hormone
  »oxytocic
T38.801T38.802T38.803T38.804T38.805T38.806
Hormone
  »parathyroid (derivatives)
T38.801T38.802T38.803T38.804T38.805T38.806
Hormone
  »pituitary (posterior) NEC
T38.801T38.802T38.803T38.804T38.805T38.806
Hormone
  »pituitary (posterior) NEC
    »anterior
T38.801T38.802T38.803T38.804T38.805T38.806
Hormone
  »specified, NEC
T38.801T38.802T38.803T38.804T38.805T38.806
Hormone
  »thyroid
T38.801T38.802T38.803T38.804T38.805T38.806
Hornet (sting)T63.451T63.452T63.453T63.454  
Horse anti-human lymphocytic serumT50.Z11T50.Z12T50.Z13T50.Z14T50.Z15T50.Z16
Horticulture agent NECT65.91T65.92T65.93T65.94  
Horticulture agent NEC
  »with pesticide
T65.91T65.92T65.93T65.94  
HumanT45.8X1T45.8X2T45.8X3T45.8X4T45.8X5T45.8X6
Human
  »albumin
T45.8X1T45.8X2T45.8X3T45.8X4T45.8X5T45.8X6
Human
  »growth hormone (HGH)
T45.8X1T45.8X2T45.8X3T45.8X4T45.8X5T45.8X6
Human
  »immune serum
T45.8X1T45.8X2T45.8X3T45.8X4T45.8X5T45.8X6
HyaluronidaseT45.3X1T45.3X2T45.3X3T45.3X4T45.3X5T45.3X6
HyazymeT45.3X1T45.3X2T45.3X3T45.3X4T45.3X5T45.3X6
HycodanT40.2X1T40.2X2T40.2X3T40.2X4T40.2X5T40.2X6
Hydantoin derivative NECT42.0X1T42.0X2T42.0X3T42.0X4T42.0X5T42.0X6
HydeltraT38.0X1T38.0X2T38.0X3T38.0X4T38.0X5T38.0X6
HydergineT44.6X1T44.6X2T44.6X3T44.6X4T44.6X5T44.6X6
Hydrabamine penicillinT36.0X1T36.0X2T36.0X3T36.0X4T36.0X5T36.0X6
HydralazineT46.5X1T46.5X2T46.5X3T46.5X4T46.5X5T46.5X6
HydrargaphenT49.0X1T49.0X2T49.0X3T49.0X4T49.0X5T49.0X6
Hydrargyri amino-chloridumT49.0X1T49.0X2T49.0X3T49.0X4T49.0X5T49.0X6
HydrastineT48.291T48.292T48.293T48.294T48.295T48.296
HydrazineT54.1X1T54.1X2T54.1X3T54.1X4  
Hydrazine
  »monoamine oxidase inhibitors
T54.1X1T54.1X2T54.1X3T54.1X4  
Hydrazoic acid, azidesT54.2X1T54.2X2T54.2X3T54.2X4  
Hydriodic acidT48.4X1T48.4X2T48.4X3T48.4X4T48.4X5T48.4X6
Hydrocarbon gasT59.891T59.892T59.893T59.894  
Hydrocarbon gas
  »incomplete combustion of
T59.891T59.892T59.893T59.894  
Hydrocarbon gas
  »liquefied (mobile container)
T59.891T59.892T59.893T59.894  
Hydrocarbon gas
  »liquefied (mobile container)
    »piped (natural)
T59.891T59.892T59.893T59.894  
Hydrochloric acid (liquid)T54.2X1T54.2X2T54.2X3T54.2X4  
Hydrochloric acid (liquid)
  »medicinal (digestant)
T54.2X1T54.2X2T54.2X3T54.2X4  
Hydrochloric acid (liquid)
  »vapor
T54.2X1T54.2X2T54.2X3T54.2X4  
HydrochlorothiazideT50.2X1T50.2X2T50.2X3T50.2X4T50.2X5T50.2X6
HydrocodoneT40.2X1T40.2X2T40.2X3T40.2X4T40.2X5T40.2X6
Hydrocortisone (derivatives)T38.0X1T38.0X2T38.0X3T38.0X4T38.0X5T38.0X6
Hydrocortisone (derivatives)
  »aceponate
T38.0X1T38.0X2T38.0X3T38.0X4T38.0X5T38.0X6
Hydrocortisone (derivatives)
  »ENT agent
T38.0X1T38.0X2T38.0X3T38.0X4T38.0X5T38.0X6
Hydrocortisone (derivatives)
  »ophthalmic preparation
T38.0X1T38.0X2T38.0X3T38.0X4T38.0X5T38.0X6
Hydrocortisone (derivatives)
  »topical NEC
T38.0X1T38.0X2T38.0X3T38.0X4T38.0X5T38.0X6
HydrocortoneT38.0X1T38.0X2T38.0X3T38.0X4T38.0X5T38.0X6
Hydrocortone
  »ENT agent
T38.0X1T38.0X2T38.0X3T38.0X4T38.0X5T38.0X6
Hydrocortone
  »ophthalmic preparation
T38.0X1T38.0X2T38.0X3T38.0X4T38.0X5T38.0X6
Hydrocortone
  »topical NEC
T38.0X1T38.0X2T38.0X3T38.0X4T38.0X5T38.0X6
Hydrocyanic acid (liquid)T57.3X1T57.3X2T57.3X3T57.3X4  
Hydrocyanic acid (liquid)
  »gas
T57.3X1T57.3X2T57.3X3T57.3X4  
HydroflumethiazideT50.2X1T50.2X2T50.2X3T50.2X4T50.2X5T50.2X6
Hydrofluoric acid (liquid)T54.2X1T54.2X2T54.2X3T54.2X4  
Hydrofluoric acid (liquid)
  »vapor
T54.2X1T54.2X2T54.2X3T54.2X4  
HydrogenT59.891T59.892T59.893T59.894  
Hydrogen
  »arsenide
T59.891T59.892T59.893T59.894  
Hydrogen
  »arseniureted
T59.891T59.892T59.893T59.894  
Hydrogen
  »chloride
T59.891T59.892T59.893T59.894  
Hydrogen
  »cyanide (salts)
T59.891T59.892T59.893T59.894  
Hydrogen
  »cyanide (salts)
    »gas
T59.891T59.892T59.893T59.894  
Hydrogen
  »Fluoride
T59.891T59.892T59.893T59.894  
Hydrogen
  »Fluoride
    »vapor
T59.891T59.892T59.893T59.894  
Hydrogen
  »peroxide
T59.891T59.892T59.893T59.894  
Hydrogen
  »phosphureted
T59.891T59.892T59.893T59.894  
Hydrogen
  »sulfide
T59.891T59.892T59.893T59.894  
Hydrogen
  »sulfide
    »arseniureted
T59.891T59.892T59.893T59.894  
Hydrogen
  »sulfureted
T59.891T59.892T59.893T59.894  
HydromethylpyridineT46.7X1T46.7X2T46.7X3T46.7X4T46.7X5T46.7X6
HydromorphinolT40.2X1T40.2X2T40.2X3T40.2X4  
HydromorphinoneT40.2X1T40.2X2T40.2X3T40.2X4T40.2X5T40.2X6
HydromorphoneT40.2X1T40.2X2T40.2X3T40.2X4T40.2X5T40.2X6
HydromoxT50.2X1T50.2X2T50.2X3T50.2X4T50.2X5T50.2X6
Hydrophilic lotionT49.3X1T49.3X2T49.3X3T49.3X4T49.3X5T49.3X6
HydroquinidineT46.2X1T46.2X2T46.2X3T46.2X4T46.2X5T46.2X6
HydroquinoneT52.2X1T52.2X2T52.2X3T52.2X4  
Hydroquinone
  »vapor
T52.2X1T52.2X2T52.2X3T52.2X4  
Hydrosulfuric acid (gas)T59.6X1T59.6X2T59.6X3T59.6X4  
HydrotalciteT47.1X1T47.1X2T47.1X3T47.1X4T47.1X5T47.1X6
Hydrous wool fatT49.3X1T49.3X2T49.3X3T49.3X4T49.3X5T49.3X6
Hydroxide, causticT54.3X1T54.3X2T54.3X3T54.3X4  
HydroxocobalaminT45.8X1T45.8X2T45.8X3T45.8X4T45.8X5T45.8X6
HydroxyamphetamineT49.5X1T49.5X2T49.5X3T49.5X4T49.5X5T49.5X6
HydroxycarbamideT45.1X1T45.1X2T45.1X3T45.1X4T45.1X5T45.1X6
HydroxychloroquineT37.8X1T37.8X2T37.8X3T37.8X4T37.8X5T37.8X6
HydroxydihydrocodeinoneT40.2X1T40.2X2T40.2X3T40.2X4T40.2X5T40.2X6
HydroxyestroneT38.5X1T38.5X2T38.5X3T38.5X4T38.5X5T38.5X6
Hydroxyethyl starchT45.8X1T45.8X2T45.8X3T45.8X4T45.8X5T45.8X6
Hydroxymethylpenta-noneT52.4X1T52.4X2T52.4X3T52.4X4  
HydroxyphenamateT43.591T43.592T43.593T43.594T43.595T43.596
HydroxyphenylbutazoneT39.2X1T39.2X2T39.2X3T39.2X4T39.2X5T39.2X6
HydroxyprogesteroneT38.5X1T38.5X2T38.5X3T38.5X4T38.5X5T38.5X6
Hydroxyprogesterone
  »caproate
T38.5X1T38.5X2T38.5X3T38.5X4T38.5X5T38.5X6
Hydroxyquinoline (derivatives) NECT37.8X1T37.8X2T37.8X3T37.8X4T37.8X5T37.8X6
HydroxystilbamidineT37.3X1T37.3X2T37.3X3T37.3X4T37.3X5T37.3X6
Hydroxytoluene (nonmedicinal)T54.0X1T54.0X2T54.0X3T54.0X4  
Hydroxytoluene (nonmedicinal)
  »medicinal
T54.0X1T54.0X2T54.0X3T54.0X4  
HydroxyureaT45.1X1T45.1X2T45.1X3T45.1X4T45.1X5T45.1X6
HydroxyzineT43.591T43.592T43.593T43.594T43.595T43.596
HyoscineT44.3X1T44.3X2T44.3X3T44.3X4T44.3X5T44.3X6
HyoscyamineT44.3X1T44.3X2T44.3X3T44.3X4T44.3X5T44.3X6
HyoscyamusT44.3X1T44.3X2T44.3X3T44.3X4T44.3X5T44.3X6
Hyoscyamus
  »dry extract
T44.3X1T44.3X2T44.3X3T44.3X4T44.3X5T44.3X6
HypaqueT50.8X1T50.8X2T50.8X3T50.8X4T50.8X5T50.8X6
HypertussisT50.Z11T50.Z12T50.Z13T50.Z14T50.Z15T50.Z16
HypnoticT42.71T42.72T42.73T42.74T42.75T42.76
Hypnotic
  »anticonvulsant
T42.71T42.72T42.73T42.74T42.75T42.76
Hypnotic
  »specified NEC
T42.71T42.72T42.73T42.74T42.75T42.76
HypochloriteT49.0X1T49.0X2T49.0X3T49.0X4T49.0X5T49.0X6
Hypophysis, posteriorT38.891T38.892T38.893T38.894T38.895T38.896
Hypotensive NECT46.5X1T46.5X2T46.5X3T46.5X4T46.5X5T46.5X6
HypromelloseT49.5X1T49.5X2T49.5X3T49.5X4T49.5X5T49.5X6

Coding Guidelines Table of Drugs and Chemicals

The Codes in categories T36 - T65 are combination codes that include the substance that was taken as well as the intent. No additional external cause code is required for poisonings, toxic effects, adverse effects and underdosing codes.

  • Do not code directly from the Table of Drugs and Chemicals. Always refer back to the Tabular List.
  • Use as many codes as necessary to describe completely all drugs, medicinal or biological substances.
  • If the same code would describe the causative agent for more than one adverse reaction, poisoning, toxic effect or underdosing, assign the code only once.
  • If two or more drugs, medicinal or biological substances are reported, code each individually unless a combination code is listed in the Table of Drugs and Chemicals.

(a) Adverse Effect

When coding an adverse effect of a drug that has been correctly prescribed and properly administered, assign the appropriate code for the nature of the adverse effect followed by the appropriate code for the adverse effect of the drug (T36-T50). The code for the drug should have a 5th or 6th character "5" (for example T36.0X5-) Examples of the nature of an adverse effect are tachycardia, delirium, gastrointestinal hemorrhaging, vomiting, hypokalemia, hepatitis, renal failure, or respiratory failure.

(b) Poisoning

When coding a poisoning or reaction to the improper use of a medication (e.g., overdose, wrong substance given or taken in error, wrong route of administration), first assign the appropriate code from categories T36-T50. The poisoning codes have an associated intent as their 5th or 6th character (accidental, intentional self-harm, assault and undetermined. If the intent of the poisoning is unknown or unspecified, code the intent as accidental intent. The undetermined intent is only for use if the documentation in the record specifies that the intent cannot be determined. Use additional code(s) for all manifestations of poisonings.

If there is also a diagnosis of abuse or dependence of the substance, the abuse or dependence is assigned as an additional code.

Examples of poisoning include:

  • (i) Error was made in drug prescription. Errors made in drug prescription or in the administration of the drug by provider, nurse, patient, or other person.
  • (ii) Overdose of a drug intentionally taken. If an overdose of a drug was intentionally taken or administered and resulted in drug toxicity, it would be coded as a poisoning.
  • (iii)Nonprescribed drug taken with correctly prescribed and properly administered drug. If a nonprescribed drug or medicinal agent was taken in combination with a correctly prescribed and properly administered drug, any drug toxicity or other reaction resulting from the interaction of the two drugs would be classified as a poisoning.
  • (iv) Interaction of drug(s) and alcohol. When a reaction results from the interaction of a drug(s) and alcohol, this would be classified as poisoning.

See Section I.C.4. if poisoning is the result of insulin pump malfunctions.

(c) Underdosing

Underdosing refers to taking less of a medication than is prescribed by a provider or a manufacturer's instruction. For underdosing, assign the code from categories T36-T50 (fifth or sixth character "6").

Codes for underdosing should never be assigned as principal or first-listed codes. If a patient has a relapse or exacerbation of the medical condition for which the drug is prescribed because of the reduction in dose, then the medical condition itself should be coded.

Noncompliance (Z91.12-, Z91.13-) or complication of care (Y63.6-Y63.9) codes are to be used with an underdosing code to indicate intent, if known.

(d) Toxic Effects

When a harmful substance is ingested or comes in contact with a person, this is classified as a toxic effect. The toxic effect codes are in categories T51-T65. Toxic effect codes have an associated intent: accidental, intentional self-harm, assault and undetermined.