2024 ICD-10-CM Diagnosis Code T45.0X2A

Poisoning by antiallergic and antiemetic drugs, intentional self-harm, initial encounter

ICD-10-CM Code:
T45.0X2A
ICD-10 Code for:
Poisoning by antiallerg/antiemetic, self-harm, init
Is Billable?
Yes - Valid for Submission
Chronic Condition Indicator: [1]
Not chronic
Code Navigator:

Code Classification

  • Injury, poisoning and certain other consequences of external causes
    (S00–T88)
    • Poisoning by, adverse effect of and underdosing of drugs, medicaments and biological substances
      (T36-T50)
      • Poisoning by, adverse effect of and underdosing of primarily systemic and hematological agents, not elsewhere classified
        (T45)

T45.0X2A is a billable diagnosis code used to specify a medical diagnosis of poisoning by antiallergic and antiemetic drugs, intentional self-harm, initial encounter. The code is valid during the current fiscal year for the submission of HIPAA-covered transactions from October 01, 2023 through September 30, 2024.

T45.0X2A is an initial encounter code, includes a 7th character and should be used while the patient is receiving active treatment for a condition like poisoning by antiallergic and antiemetic drugs intentional self-harm. According to ICD-10-CM Guidelines an "initial encounter" doesn't necessarily means "initial visit". The 7th character should be used when the patient is undergoing active treatment regardless if new or different providers saw the patient over the course of a treatment. The appropriate 7th character codes should also be used even if the patient delayed seeking treatment for a condition.

Approximate Synonyms

The following clinical terms are approximate synonyms or lay terms that might be used to identify the correct diagnosis code:

  • 5-HT3-receptor antagonist overdose
  • 5-HT3-receptor antagonist poisoning
  • 5-HT3-receptor antagonist poisoning
  • Chlorphenamine overdose
  • Chlorphenamine poisoning
  • Chlorphenamine poisoning
  • Diphenhydramine overdose
  • Diphenylpyraline overdose
  • Domperidone overdose
  • Domperidone poisoning
  • Domperidone poisoning
  • Intentional 5-HT3-receptor antagonist overdose
  • Intentional 5-HT3-receptor antagonist poisoning
  • Intentional chlorphenamine overdose
  • Intentional chlorphenamine poisoning
  • Intentional diphenhydramine overdose
  • Intentional diphenhydramine poisoning
  • Intentional diphenylpyraline overdose
  • Intentional diphenylpyraline poisoning
  • Intentional domperidone overdose
  • Intentional domperidone poisoning
  • Intentional metoclopramide overdose
  • Intentional metoclopramide poisoning
  • Intentional thonzylamine overdose
  • Intentional tripelennamine overdose
  • Metoclopramide overdose
  • Metoclopramide poisoning
  • Metoclopramide poisoning
  • Poisoning by diphenhydramine
  • Poisoning by diphenhydramine
  • Poisoning by diphenylpyraline
  • Poisoning by diphenylpyraline
  • Poisoning by thonzylamine
  • Poisoning by tripelennamine
  • Thonzylamine overdose
  • Tripelennamine overdose

Clinical Classification

Clinical CategoryCCSR Category CodeInpatient Default CCSROutpatient Default CCSR
External cause codes: intent of injury, self-harmEXT021N - Not default inpatient assignment for principal diagnosis or first-listed diagnosis.N - Not default outpatient assignment for principal diagnosis or first-listed diagnosis.
External cause codes: poisoning by drugEXT014N - Not default inpatient assignment for principal diagnosis or first-listed diagnosis.N - Not default outpatient assignment for principal diagnosis or first-listed diagnosis.
Poisoning by drugs, initial encounterINJ022N - Not default inpatient assignment for principal diagnosis or first-listed diagnosis.N - Not default outpatient assignment for principal diagnosis or first-listed diagnosis.
Suicidal ideation/attempt/intentional self-harmMBD012Y - Yes, default inpatient assignment for principal diagnosis or first-listed diagnosis.Y - Yes, default outpatient assignment for principal diagnosis or first-listed diagnosis.

Clinical Information

  • Astemizole

    antihistamine drug now withdrawn from the market in many countries because of rare but potentially fatal side effects.
  • Brompheniramine

    histamine h1 antagonist used in treatment of allergies, rhinitis, and urticaria.
  • Cetirizine

    a potent second-generation histamine h1 antagonist that is effective in the treatment of allergic rhinitis, chronic urticaria, and pollen-induced asthma. unlike many traditional antihistamines, it does not cause drowsiness or anticholinergic side effects.
  • Chlorpheniramine

    a histamine h1 antagonist used in allergic reactions, hay fever, rhinitis, urticaria, and asthma. it has also been used in veterinary applications. one of the most widely used of the classical antihistaminics, it generally causes less drowsiness and sedation than promethazine.
  • Cinnarizine

    a piperazine derivative having histamine h1-receptor and calcium-channel blocking activity with vasodilating and antiemetic properties but it induces parkinsonian disorders.
  • Clemastine

    a histamine h1 antagonist used as the hydrogen fumarate in hay fever, rhinitis, allergic skin conditions, and pruritus. it causes drowsiness.
  • Cyclizine

    a histamine h1 antagonist given by mouth or parenterally for the control of postoperative and drug-induced vomiting and in motion sickness. (from martindale, the extra pharmacopoeia, 30th ed, p935)
  • Cyproheptadine

    a serotonin antagonist and a histamine h1 blocker used as antipruritic, appetite stimulant, antiallergic, and for the post-gastrectomy dumping syndrome, etc.
  • Dimenhydrinate

    a drug combination that contains diphenhydramine and theophylline. it is used for treating vertigo, motion sickness, and nausea associated with pregnancy.
  • Dimethindene

    a histamine h1 antagonist. it is used in hypersensitivity reactions, in rhinitis, for pruritus, and in some common cold remedies.
  • Diphenhydramine

    a histamine h1 antagonist used as an antiemetic, antitussive, for dermatoses and pruritus, for hypersensitivity reactions, as a hypnotic, an antiparkinson, and as an ingredient in common cold preparations. it has some undesired antimuscarinic and sedative effects.
  • Domperidone

    a specific blocker of dopamine receptors. it speeds gastrointestinal peristalsis, causes prolactin release, and is used as antiemetic and tool in the study of dopaminergic mechanisms.
  • Doxylamine

    histamine h1 antagonist with pronounced sedative properties. it is used in allergies and as an antitussive, antiemetic, and hypnotic. doxylamine has also been administered in veterinary applications and was formerly used in parkinsonism.
  • Granisetron

    a serotonin receptor (5ht-3 selective) antagonist that has been used as an antiemetic for cancer chemotherapy patients.
  • Ketotifen

    a cycloheptathiophene blocker of histamine h1 receptors and release of inflammatory mediators. it has been proposed for the treatment of asthma, rhinitis, skin allergies, and anaphylaxis.
  • Methapyrilene

    histamine h1 antagonist with sedative action used as a hypnotic and in allergies.
  • Metoclopramide

    a dopamine d2 antagonist that is used as an antiemetic.
  • Ondansetron

    a competitive serotonin type 3 receptor antagonist. it is effective in the treatment of nausea and vomiting caused by cytotoxic chemotherapy drugs, including cisplatin, and has reported anxiolytic and neuroleptic properties.
  • Pheniramine

    one of the histamine h1 antagonists with little sedative action. it is used in treatment of hay fever, rhinitis, allergic dermatoses, and pruritus.
  • Pyrilamine

    a histamine h1 antagonist. it has mild hypnotic properties and some local anesthetic action and is used for allergies (including skin eruptions) both parenterally and locally. it is a common ingredient of cold remedies.
  • Terfenadine

    a selective histamine h1-receptor antagonist devoid of central nervous system depressant activity. the drug was used for allergy but withdrawn due to causing long qt syndrome.
  • Tripelennamine

    a histamine h1 antagonist with low sedative action but frequent gastrointestinal irritation. it is used to treat asthma; hay fever; urticaria; and rhinitis; and also in veterinary applications. tripelennamine is administered by various routes, including topically.
  • Triprolidine

    histamine h1 antagonist used in allergic rhinitis; asthma; and urticaria. it is a component of cough and cold medicines. it may cause drowsiness.

Coding Guidelines

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.

The appropriate 7th character is to be added to each code from block Poisoning by, adverse effect of and underdosing of primarily systemic and hematological agents, not elsewhere classified (T45). Use the following options for the aplicable episode of care:

  • A - initial encounter
  • D - subsequent encounter
  • S - sequela

Convert T45.0X2A to ICD-9-CM

  • ICD-9-CM Code: 963.0 - Pois-antiallrg/antiemet
    Combination Flag - Multiple codes are needed to describe the source diagnosis code. Correct coding should be done based on contextual judgment.
  • ICD-9-CM Code: E950.4 - Poison-drug/medicin NEC
    Combination Flag - Multiple codes are needed to describe the source diagnosis code. Correct coding should be done based on contextual judgment.

Table of Drugs and Chemicals

The parent code T45.0X2 of the current diagnosis code is referenced in the Table of Drugs and Chemicals, this table contains a classification of drugs, industrial solvents, corrosive gases, noxious plants, pesticides, and other toxic agents.

According to ICD-10-CM coding guidelines it is advised to do not code directly from the Table of Drugs and Chemicals, instead always refer back to the Tabular List when doing the initial coding. Each substance in the table is assigned a code according to the poisoning classification and external causes of adverse effects. It is important to use as many codes as necessary to specify all reported drugs, medicinal or chemical substances. If the same diagnosis code describes the causative agent for more than one adverse reaction, poisoning, toxic effect or underdosing, utilize the code only once.

Substance Poisoning
Accidental
(unintentional)
Poisoning
Accidental
(self-harm)
Poisoning
Assault
Poisoning
Undetermined
Adverse
effect
Underdosing
AcrivastineT45.0X1T45.0X2T45.0X3T45.0X4T45.0X5T45.0X6
AlizaprideT45.0X1T45.0X2T45.0X3T45.0X4T45.0X5T45.0X6
Antazolin (e)T45.0X1T45.0X2T45.0X3T45.0X4T45.0X5T45.0X6
Antiallergic NECT45.0X1T45.0X2T45.0X3T45.0X4T45.0X5T45.0X6
Antiemetic drugT45.0X1T45.0X2T45.0X3T45.0X4T45.0X5T45.0X6
AntihistamineT45.0X1T45.0X2T45.0X3T45.0X4T45.0X5T45.0X6
Antinausea drugT45.0X1T45.0X2T45.0X3T45.0X4T45.0X5T45.0X6
AntistineT45.0X1T45.0X2T45.0X3T45.0X4T45.0X5T45.0X6
Antivertigo drugT45.0X1T45.0X2T45.0X3T45.0X4T45.0X5T45.0X6
AstemizoleT45.0X1T45.0X2T45.0X3T45.0X4T45.0X5T45.0X6
AzatadineT45.0X1T45.0X2T45.0X3T45.0X4T45.0X5T45.0X6
AzelastineT45.0X1T45.0X2T45.0X3T45.0X4T45.0X5T45.0X6
BamipineT45.0X1T45.0X2T45.0X3T45.0X4T45.0X5T45.0X6
BenadrylT45.0X1T45.0X2T45.0X3T45.0X4T45.0X5T45.0X6
Benzhydramine (chloride)T45.0X1T45.0X2T45.0X3T45.0X4T45.0X5T45.0X6
BenzquinamideT45.0X1T45.0X2T45.0X3T45.0X4T45.0X5T45.0X6
Bisulepin (hydrochloride)T45.0X1T45.0X2T45.0X3T45.0X4T45.0X5T45.0X6
BonineT45.0X1T45.0X2T45.0X3T45.0X4T45.0X5T45.0X6
BromazineT45.0X1T45.0X2T45.0X3T45.0X4T45.0X5T45.0X6
BromodiphenhydramineT45.0X1T45.0X2T45.0X3T45.0X4T45.0X5T45.0X6
BrompheniramineT45.0X1T45.0X2T45.0X3T45.0X4T45.0X5T45.0X6
BuclizineT45.0X1T45.0X2T45.0X3T45.0X4T45.0X5T45.0X6
CarbinoxamineT45.0X1T45.0X2T45.0X3T45.0X4T45.0X5T45.0X6
Cerium oxalateT45.0X1T45.0X2T45.0X3T45.0X4T45.0X5T45.0X6
Cerous oxalateT45.0X1T45.0X2T45.0X3T45.0X4T45.0X5T45.0X6
CetirizineT45.0X1T45.0X2T45.0X3T45.0X4T45.0X5T45.0X6
CetoximeT45.0X1T45.0X2T45.0X3T45.0X4T45.0X5T45.0X6
ChlorcyclizineT45.0X1T45.0X2T45.0X3T45.0X4T45.0X5T45.0X6
ChloropyramineT45.0X1T45.0X2T45.0X3T45.0X4T45.0X5T45.0X6
ChloropyrileneT45.0X1T45.0X2T45.0X3T45.0X4T45.0X5T45.0X6
ChlorothenT45.0X1T45.0X2T45.0X3T45.0X4T45.0X5T45.0X6
ChlorphenamineT45.0X1T45.0X2T45.0X3T45.0X4T45.0X5T45.0X6
ChlorpheniramineT45.0X1T45.0X2T45.0X3T45.0X4T45.0X5T45.0X6
ChlorphenoxamineT45.0X1T45.0X2T45.0X3T45.0X4T45.0X5T45.0X6
Chlor-TrimetonT45.0X1T45.0X2T45.0X3T45.0X4T45.0X5T45.0X6
CinnarizineT45.0X1T45.0X2T45.0X3T45.0X4T45.0X5T45.0X6
ClemastineT45.0X1T45.0X2T45.0X3T45.0X4T45.0X5T45.0X6
ClemizoleT45.0X1T45.0X2T45.0X3T45.0X4T45.0X5T45.0X6
Clemizole
  »penicillin
T45.0X1T45.0X2T45.0X3T45.0X4T45.0X5T45.0X6
ClorfenamineT45.0X1T45.0X2T45.0X3T45.0X4T45.0X5T45.0X6
CyclizineT45.0X1T45.0X2T45.0X3T45.0X4T45.0X5T45.0X6
CyproheptadineT45.0X1T45.0X2T45.0X3T45.0X4T45.0X5T45.0X6
DeptropineT45.0X1T45.0X2T45.0X3T45.0X4T45.0X5T45.0X6
DexbrompheniramineT45.0X1T45.0X2T45.0X3T45.0X4T45.0X5T45.0X6
DexchlorpheniramineT45.0X1T45.0X2T45.0X3T45.0X4T45.0X5T45.0X6
DibenzheptropineT45.0X1T45.0X2T45.0X3T45.0X4T45.0X5T45.0X6
DifenidolT45.0X1T45.0X2T45.0X3T45.0X4T45.0X5T45.0X6
DimenhydrinateT45.0X1T45.0X2T45.0X3T45.0X4T45.0X5T45.0X6
DimetaneT45.0X1T45.0X2T45.0X3T45.0X4T45.0X5T45.0X6
DimethindeneT45.0X1T45.0X2T45.0X3T45.0X4T45.0X5T45.0X6
DimetindeneT45.0X1T45.0X2T45.0X3T45.0X4T45.0X5T45.0X6
DiphenhydramineT45.0X1T45.0X2T45.0X3T45.0X4T45.0X5T45.0X6
DiphenidolT45.0X1T45.0X2T45.0X3T45.0X4T45.0X5T45.0X6
DiphenylpyralineT45.0X1T45.0X2T45.0X3T45.0X4T45.0X5T45.0X6
DomperidoneT45.0X1T45.0X2T45.0X3T45.0X4T45.0X5T45.0X6
DoxylamineT45.0X1T45.0X2T45.0X3T45.0X4T45.0X5T45.0X6
DramamineT45.0X1T45.0X2T45.0X3T45.0X4T45.0X5T45.0X6
EmbramineT45.0X1T45.0X2T45.0X3T45.0X4T45.0X5T45.0X6
GranisetronT45.0X1T45.0X2T45.0X3T45.0X4T45.0X5T45.0X6
HomochlorcyclizineT45.0X1T45.0X2T45.0X3T45.0X4T45.0X5T45.0X6
IsothipendylT45.0X1T45.0X2T45.0X3T45.0X4T45.0X5T45.0X6
KetotifenT45.0X1T45.0X2T45.0X3T45.0X4T45.0X5T45.0X6
Levocabastine (hydrochloride)T45.0X1T45.0X2T45.0X3T45.0X4T45.0X5T45.0X6
LoratidineT45.0X1T45.0X2T45.0X3T45.0X4T45.0X5T45.0X6
MarezineT45.0X1T45.0X2T45.0X3T45.0X4T45.0X5T45.0X6
MebhydrolinT45.0X1T45.0X2T45.0X3T45.0X4T45.0X5T45.0X6
Meclizine (hydrochloride)T45.0X1T45.0X2T45.0X3T45.0X4T45.0X5T45.0X6
MeclozineT45.0X1T45.0X2T45.0X3T45.0X4T45.0X5T45.0X6
MephenhydramineT45.0X1T45.0X2T45.0X3T45.0X4T45.0X5T45.0X6
MepyramineT45.0X1T45.0X2T45.0X3T45.0X4T45.0X5T45.0X6
MethaphenileneT45.0X1T45.0X2T45.0X3T45.0X4T45.0X5T45.0X6
MethapyrileneT45.0X1T45.0X2T45.0X3T45.0X4T45.0X5T45.0X6
MetoclopramideT45.0X1T45.0X2T45.0X3T45.0X4T45.0X5T45.0X6
MoxastineT45.0X1T45.0X2T45.0X3T45.0X4T45.0X5T45.0X6
NytolT45.0X1T45.0X2T45.0X3T45.0X4T45.0X5T45.0X6
OndansetronT45.0X1T45.0X2T45.0X3T45.0X4T45.0X5T45.0X6
OxatomideT45.0X1T45.0X2T45.0X3T45.0X4T45.0X5T45.0X6
Percogesic [See Also: acetaminophen]T45.0X1T45.0X2T45.0X3T45.0X4T45.0X5T45.0X6
PeriactinT45.0X1T45.0X2T45.0X3T45.0X4T45.0X5T45.0X6
PhenindamineT45.0X1T45.0X2T45.0X3T45.0X4T45.0X5T45.0X6
PheniramineT45.0X1T45.0X2T45.0X3T45.0X4T45.0X5T45.0X6
PhenyltoloxamineT45.0X1T45.0X2T45.0X3T45.0X4T45.0X5T45.0X6
PimethixeneT45.0X1T45.0X2T45.0X3T45.0X4T45.0X5T45.0X6
PipamazineT45.0X1T45.0X2T45.0X3T45.0X4T45.0X5T45.0X6
PipoxizineT45.0X1T45.0X2T45.0X3T45.0X4T45.0X5T45.0X6
PiprinhydrinateT45.0X1T45.0X2T45.0X3T45.0X4T45.0X5T45.0X6
PropiomazineT45.0X1T45.0X2T45.0X3T45.0X4T45.0X5T45.0X6
PyrathiazineT45.0X1T45.0X2T45.0X3T45.0X4T45.0X5T45.0X6
PyribenzamineT45.0X1T45.0X2T45.0X3T45.0X4T45.0X5T45.0X6
PyrilamineT45.0X1T45.0X2T45.0X3T45.0X4T45.0X5T45.0X6
PyrrobutamineT45.0X1T45.0X2T45.0X3T45.0X4T45.0X5T45.0X6
RotoxamineT45.0X1T45.0X2T45.0X3T45.0X4T45.0X5T45.0X6
SetastineT45.0X1T45.0X2T45.0X3T45.0X4T45.0X5T45.0X6
Sleep-ezeT45.0X1T45.0X2T45.0X3T45.0X4T45.0X5T45.0X6
SominexT45.0X1T45.0X2T45.0X3T45.0X4T45.0X5T45.0X6
TerfenadineT45.0X1T45.0X2T45.0X3T45.0X4T45.0X5T45.0X6
ThenyldiamineT45.0X1T45.0X2T45.0X3T45.0X4T45.0X5T45.0X6
Thonzylamine (systemic)T45.0X1T45.0X2T45.0X3T45.0X4T45.0X5T45.0X6
Thonzylamine (systemic)
  »mucosal decongestant
T45.0X1T45.0X2T45.0X3T45.0X4T45.0X5T45.0X6
TiganT45.0X1T45.0X2T45.0X3T45.0X4T45.0X5T45.0X6
TranilastT45.0X1T45.0X2T45.0X3T45.0X4T45.0X5T45.0X6
TrimethobenzamideT45.0X1T45.0X2T45.0X3T45.0X4T45.0X5T45.0X6
TrimetonT45.0X1T45.0X2T45.0X3T45.0X4T45.0X5T45.0X6
TripelennamineT45.0X1T45.0X2T45.0X3T45.0X4T45.0X5T45.0X6
TriprolidineT45.0X1T45.0X2T45.0X3T45.0X4T45.0X5T45.0X6
TritoqualineT45.0X1T45.0X2T45.0X3T45.0X4T45.0X5T45.0X6

Patient Education


Poisoning

A poison is any substance that is harmful to your body. You might swallow it, inhale it, inject it, or absorb it through your skin. Any substance can be poisonous if too much is taken. Poisons can include:

  • Prescription or over-the-counter medicines taken in doses that are too high
  • Overdoses of illegal drugs
  • Carbon monoxide from gas appliances
  • Household products, such as laundry powder or furniture polish
  • Pesticides
  • Indoor or outdoor plants
  • Metals such as lead and mercury

The effects of poisoning range from short-term illness to brain damage, coma, and death. To prevent poisoning it is important to use and store products exactly as their labels say. Keep dangerous products where children can't get to them. Treatment for poisoning depends on the type of poison. If you suspect someone has been poisoned, call your local poison control center at 1-800-222-1222 right away.


[Learn More in MedlinePlus]

Code History

  • FY 2024 - No Change, effective from 10/1/2023 through 9/30/2024
  • FY 2023 - No Change, effective from 10/1/2022 through 9/30/2023
  • FY 2022 - No Change, effective from 10/1/2021 through 9/30/2022
  • FY 2021 - No Change, effective from 10/1/2020 through 9/30/2021
  • FY 2020 - No Change, effective from 10/1/2019 through 9/30/2020
  • FY 2019 - No Change, effective from 10/1/2018 through 9/30/2019
  • FY 2018 - No Change, effective from 10/1/2017 through 9/30/2018
  • FY 2017 - No Change, effective from 10/1/2016 through 9/30/2017
  • FY 2016 - New Code, effective from 10/1/2015 through 9/30/2016. This was the first year ICD-10-CM was implemented into the HIPAA code set.

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.