2024 ICD-10-CM Diagnosis Code T46.1X4

Poisoning by calcium-channel blockers, undetermined

ICD-10-CM Code:
T46.1X4
ICD-10 Code for:
Poisoning by calcium-channel blockers, undetermined
Is Billable?
Not Valid for Submission
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 agents primarily affecting the cardiovascular system
        (T46)

T46.1X4 is a non-specific and non-billable diagnosis code code, consider using a code with a higher level of specificity for a diagnosis of poisoning by calcium-channel blockers, undetermined. The code is not specific and is NOT valid for the year 2024 for the submission of HIPAA-covered transactions. Category or Header define the heading of a category of codes that may be further subdivided by the use of 4th, 5th, 6th or 7th characters.

Specific Coding Applicable to Poisoning by calcium-channel blockers, undetermined

Non-specific codes like T46.1X4 require more digits to indicate the appropriate level of specificity. Consider using any of the following ICD-10-CM codes with a higher level of specificity when coding for poisoning by calcium-channel blockers, undetermined:

  • Use T46.1X4A for initial encounter - BILLABLE CODE

  • Use T46.1X4D for subsequent encounter - BILLABLE CODE

  • Use T46.1X4S for sequela - BILLABLE CODE

Clinical Information

  • Bepridil

    a long-acting calcium-blocking agent with significant anti-anginal activity. the drug produces significant coronary vasodilation and modest peripheral effects. it has antihypertensive and selective anti-arrhythmia activities and acts as a calmodulin antagonist.
  • Diltiazem

    a benzothiazepine derivative with vasodilating action due to its antagonism of the actions of calcium ion on membrane functions.
  • Felodipine

    a dihydropyridine calcium antagonist with positive inotropic effects. it lowers blood pressure by reducing peripheral vascular resistance through a highly selective action on smooth muscle in arteriolar resistance vessels.
  • Fendiline

    coronary vasodilator; inhibits calcium function in muscle cells in excitation-contraction coupling; proposed as antiarrhythmic and antianginal agents.
  • Gallopamil

    coronary vasodilator that is an analog of iproveratril (verapamil) with one more methoxy group on the benzene ring.
  • Isradipine

    a potent antagonist of calcium channels that is highly selective for vascular smooth muscle. it is effective in the treatment of chronic stable angina pectoris, hypertension, and congestive cardiac failure.
  • Lidoflazine

    coronary vasodilator with some antiarrhythmic action.
  • Nicardipine

    a potent calcium channel blockader with marked vasodilator action. it has antihypertensive properties and is effective in the treatment of angina and coronary spasms without showing cardiodepressant effects. it has also been used in the treatment of asthma and enhances the action of specific antineoplastic agents.
  • Nifedipine

    a potent vasodilator agent with calcium antagonistic action. it is a useful anti-anginal agent that also lowers blood pressure.
  • Nimodipine

    a calcium channel blockader with preferential cerebrovascular activity. it has marked cerebrovascular dilating effects and lowers blood pressure.
  • Nisoldipine

    a dihydropyridine calcium channel antagonist that acts as a potent arterial vasodilator and antihypertensive agent. it is also effective in patients with cardiac failure and angina.
  • Nitrendipine

    a calcium channel blocker with marked vasodilator action. it is an effective antihypertensive agent and differs from other calcium channel blockers in that it does not reduce glomerular filtration rate and is mildly natriuretic, rather than sodium retentive.
  • Verapamil

    a calcium channel blocker that is a class iv anti-arrhythmia agent.

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 agents primarily affecting the cardiovascular system (T46). Use the following options for the aplicable episode of care:

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

Table of Drugs and Chemicals

The 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
BepridilT46.1X1T46.1X2T46.1X3T46.1X4T46.1X5T46.1X6
Blockers, calcium channelT46.1X1T46.1X2T46.1X3T46.1X4T46.1X5T46.1X6
DiltiazemT46.1X1T46.1X2T46.1X3T46.1X4T46.1X5T46.1X6
FelodipineT46.1X1T46.1X2T46.1X3T46.1X4T46.1X5T46.1X6
FendilineT46.1X1T46.1X2T46.1X3T46.1X4T46.1X5T46.1X6
GallopamilT46.1X1T46.1X2T46.1X3T46.1X4T46.1X5T46.1X6
IproveratrilT46.1X1T46.1X2T46.1X3T46.1X4T46.1X5T46.1X6
IsradipineT46.1X1T46.1X2T46.1X3T46.1X4T46.1X5T46.1X6
LidoflazineT46.1X1T46.1X2T46.1X3T46.1X4T46.1X5T46.1X6
Monoxidine hydrochlorideT46.1X1T46.1X2T46.1X3T46.1X4T46.1X5T46.1X6
NicardipineT46.1X1T46.1X2T46.1X3T46.1X4T46.1X5T46.1X6
NifedipineT46.1X1T46.1X2T46.1X3T46.1X4T46.1X5T46.1X6
NimodipineT46.1X1T46.1X2T46.1X3T46.1X4T46.1X5T46.1X6
NisoldipineT46.1X1T46.1X2T46.1X3T46.1X4T46.1X5T46.1X6
NitrendipineT46.1X1T46.1X2T46.1X3T46.1X4T46.1X5T46.1X6
OxodipineT46.1X1T46.1X2T46.1X3T46.1X4T46.1X5T46.1X6
TiapamilT46.1X1T46.1X2T46.1X3T46.1X4T46.1X5T46.1X6
VerapamilT46.1X1T46.1X2T46.1X3T46.1X4T46.1X5T46.1X6

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.