2024 ICD-10-CM Diagnosis Code T37.2X4A

Poisoning by antimalarials and drugs acting on other blood protozoa, undetermined, initial encounter

ICD-10-CM Code:
T37.2X4A
ICD-10 Code for:
Poisn by antimalari/drugs acting on bld protzoa, undet, 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 other systemic anti-infectives and antiparasitics
        (T37)

T37.2X4A is a billable diagnosis code used to specify a medical diagnosis of poisoning by antimalarials and drugs acting on other blood protozoa, undetermined, 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.

T37.2X4A 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 antimalarials and drugs acting on other blood protozoa undetermined. 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.

Clinical Classification

Clinical CategoryCCSR Category CodeInpatient Default CCSROutpatient Default CCSR
External cause codes: intent of injury, undeterminedEXT023N - 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 encounterINJ022Y - 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

  • Amodiaquine

    a 4-aminoquinoline compound with anti-inflammatory properties.
  • Chloroquine

    the prototypical antimalarial agent with a mechanism that is not well understood. it has also been used to treat rheumatoid arthritis, systemic lupus erythematosus, and in the systemic therapy of amebic liver abscesses.
  • Cinchona

    a genus of rubiaceous south american trees that yields the toxic cinchona alkaloids from their bark; quinine; quinidine; chinconine, cinchonidine and others are used to treat malaria and cardiac arrhythmias.
  • Cinchona Alkaloids

    alkaloids extracted from various species of cinchona.
  • Eflornithine

    an inhibitor of ornithine decarboxylase, the rate limiting enzyme of the polyamine biosynthetic pathway.
  • Mefloquine

    a phospholipid-interacting antimalarial drug (antimalarials). it is very effective against plasmodium falciparum with very few side effects.
  • Primaquine

    an aminoquinoline that is given by mouth to produce a radical cure and prevent relapse of vivax and ovale malarias following treatment with a blood schizontocide. it has also been used to prevent transmission of falciparum malaria by those returning to areas where there is a potential for re-introduction of malaria. adverse effects include anemias and gi disturbances. (from martindale, the extra pharmacopeia, 30th ed, p404)
  • Proguanil

    a biguanide compound which metabolizes in the body to form cycloguanil, an anti-malaria agent.
  • Pyrimethamine

    one of the folic acid antagonists that is used as an antimalarial or with a sulfonamide to treat toxoplasmosis.
  • Quinacrine

    an acridine derivative formerly widely used as an antimalarial but superseded by chloroquine in recent years. it has also been used as an anthelmintic and in the treatment of giardiasis and malignant effusions. it is used in cell biological experiments as an inhibitor of phospholipase a2.
  • Quinacrine Mustard

    nitrogen mustard analog of quinacrine used primarily as a stain in the studies of chromosomes and chromatin. fluoresces by reaction with nucleic acids in chromosomes.
  • Quinine

    an alkaloid derived from the bark of the cinchona tree. it is used as an antimalarial drug, and is the active ingredient in extracts of the cinchona that have been used for that purpose since before 1633. quinine is also a mild antipyretic and analgesic and has been used in common cold preparations for that purpose. it was used commonly and as a bitter and flavoring agent, and is still useful for the treatment of babesiosis. quinine is also useful in some muscular disorders, especially nocturnal leg cramps and myotonia congenita, because of its direct effects on muscle membrane and sodium channels. the mechanisms of its antimalarial effects are not well understood.

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 other systemic anti-infectives and antiparasitics (T37). Use the following options for the aplicable episode of care:

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

Convert T37.2X4A to ICD-9-CM

  • ICD-9-CM Code: 961.4 - Poisoning-antimalarials
    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: E980.4 - Undet pois-med agnt 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 T37.2X4 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
8-Aminoquinoline drugsT37.2X1T37.2X2T37.2X3T37.2X4T37.2X5T37.2X6
AmodiaquineT37.2X1T37.2X2T37.2X3T37.2X4T37.2X5T37.2X6
Amopyroquin (e)T37.2X1T37.2X2T37.2X3T37.2X4T37.2X5T37.2X6
AntimalarialT37.2X1T37.2X2T37.2X3T37.2X4T37.2X5T37.2X6
Antimalarial
  »prophylactic NEC
T37.2X1T37.2X2T37.2X3T37.2X4T37.2X5T37.2X6
Antimalarial
  »pyrimidine derivative
T37.2X1T37.2X2T37.2X3T37.2X4T37.2X5T37.2X6
AralenT37.2X1T37.2X2T37.2X3T37.2X4T37.2X5T37.2X6
CamoquinT37.2X1T37.2X2T37.2X3T37.2X4T37.2X5T37.2X6
ChloroguanideT37.2X1T37.2X2T37.2X3T37.2X4T37.2X5T37.2X6
ChloroquineT37.2X1T37.2X2T37.2X3T37.2X4T37.2X5T37.2X6
ChlorproguanilT37.2X1T37.2X2T37.2X3T37.2X4T37.2X5T37.2X6
CinchonaT37.2X1T37.2X2T37.2X3T37.2X4T37.2X5T37.2X6
Cinchonine alkaloidsT37.2X1T37.2X2T37.2X3T37.2X4T37.2X5T37.2X6
Cycloguanil embonateT37.2X1T37.2X2T37.2X3T37.2X4T37.2X5T37.2X6
DaraprimT37.2X1T37.2X2T37.2X3T37.2X4T37.2X5T37.2X6
EflornithineT37.2X1T37.2X2T37.2X3T37.2X4T37.2X5T37.2X6
GuanatolT37.2X1T37.2X2T37.2X3T37.2X4T37.2X5T37.2X6
HalofantrineT37.2X1T37.2X2T37.2X3T37.2X4T37.2X5T37.2X6
IsopentaquineT37.2X1T37.2X2T37.2X3T37.2X4T37.2X5T37.2X6
MefloquineT37.2X1T37.2X2T37.2X3T37.2X4T37.2X5T37.2X6
MepacrineT37.2X1T37.2X2T37.2X3T37.2X4T37.2X5T37.2X6
PaludrineT37.2X1T37.2X2T37.2X3T37.2X4T37.2X5T37.2X6
Pamaquine (naphthoute)T37.2X1T37.2X2T37.2X3T37.2X4T37.2X5T37.2X6
PentaquineT37.2X1T37.2X2T37.2X3T37.2X4T37.2X5T37.2X6
PrimaquineT37.2X1T37.2X2T37.2X3T37.2X4T37.2X5T37.2X6
ProguanilT37.2X1T37.2X2T37.2X3T37.2X4T37.2X5T37.2X6
PyrimethamineT37.2X1T37.2X2T37.2X3T37.2X4T37.2X5T37.2X6
Pyrimethamine
  »with sulfadoxine
T37.2X1T37.2X2T37.2X3T37.2X4T37.2X5T37.2X6
QuinacrineT37.2X1T37.2X2T37.2X3T37.2X4T37.2X5T37.2X6
QuinineT37.2X1T37.2X2T37.2X3T37.2X4T37.2X5T37.2X6
QuinocideT37.2X1T37.2X2T37.2X3T37.2X4T37.2X5T37.2X6
Schizontozide (blood) (tissue)T37.2X1T37.2X2T37.2X3T37.2X4T37.2X5T37.2X6

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.


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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.