1. Home
  2. ICD-10-CM Codes
  3. S00–T88
  4. T36-T50
  5. T43
  6. 2024 ICD-10-CM Code T43.6
Version 2024
Non-Billable Code

2024 ICD-10-CM Diagnosis Code T43.6

Poisoning by, adverse effect of and underdosing of psychostimulants

ICD-10-CM Code:
T43.6
ICD-10 Code for:
Psychostimulants
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 psychotropic drugs, not elsewhere classified
        (T43)

T43.6 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, adverse effect of and underdosing of psychostimulants. 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 Psychostimulants

Non-specific codes like T43.6 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 psychostimulants:

  • T43.60 for Poisoning by, adverse effect of and underdosing of unspecified psychostimulant - NON-BILLABLE CODE

  • T43.601 for Poisoning by unspecified psychostimulants, accidental (unintentional) - NON-BILLABLE CODE

  • Use T43.601A for initial encounter - BILLABLE CODE

  • Use T43.601D for subsequent encounter - BILLABLE CODE

  • Use T43.601S for sequela - BILLABLE CODE

  • T43.602 for Poisoning by unspecified psychostimulants, intentional self-harm - NON-BILLABLE CODE

  • Use T43.602A for initial encounter - BILLABLE CODE

  • Use T43.602D for subsequent encounter - BILLABLE CODE

  • Use T43.602S for sequela - BILLABLE CODE

  • T43.603 for Poisoning by unspecified psychostimulants, assault - NON-BILLABLE CODE

  • Use T43.603A for initial encounter - BILLABLE CODE

  • Use T43.603D for subsequent encounter - BILLABLE CODE

  • Use T43.603S for sequela - BILLABLE CODE

  • T43.604 for Poisoning by unspecified psychostimulants, undetermined - NON-BILLABLE CODE

  • Use T43.604A for initial encounter - BILLABLE CODE

  • Use T43.604D for subsequent encounter - BILLABLE CODE

  • Use T43.604S for sequela - BILLABLE CODE

  • T43.605 for Adverse effect of unspecified psychostimulants - NON-BILLABLE CODE

  • Use T43.605A for initial encounter - BILLABLE CODE

  • Use T43.605D for subsequent encounter - BILLABLE CODE

  • Use T43.605S for sequela - BILLABLE CODE

  • T43.606 for Underdosing of unspecified psychostimulants - NON-BILLABLE CODE

  • Use T43.606A for initial encounter - BILLABLE CODE

  • Use T43.606D for subsequent encounter - BILLABLE CODE

  • Use T43.606S for sequela - BILLABLE CODE

  • T43.61 for Poisoning by, adverse effect of and underdosing of caffeine - NON-BILLABLE CODE

  • T43.611 for Poisoning by caffeine, accidental (unintentional) - NON-BILLABLE CODE

  • Use T43.611A for initial encounter - BILLABLE CODE

  • Use T43.611D for subsequent encounter - BILLABLE CODE

  • Use T43.611S for sequela - BILLABLE CODE

  • T43.612 for Poisoning by caffeine, intentional self-harm - NON-BILLABLE CODE

  • Use T43.612A for initial encounter - BILLABLE CODE

  • Use T43.612D for subsequent encounter - BILLABLE CODE

  • Use T43.612S for sequela - BILLABLE CODE

  • T43.613 for Poisoning by caffeine, assault - NON-BILLABLE CODE

  • Use T43.613A for initial encounter - BILLABLE CODE

  • Use T43.613D for subsequent encounter - BILLABLE CODE

  • Use T43.613S for sequela - BILLABLE CODE

  • T43.614 for Poisoning by caffeine, undetermined - NON-BILLABLE CODE

  • Use T43.614A for initial encounter - BILLABLE CODE

  • Use T43.614D for subsequent encounter - BILLABLE CODE

  • Use T43.614S for sequela - BILLABLE CODE

  • T43.615 for Adverse effect of caffeine - NON-BILLABLE CODE

  • Use T43.615A for initial encounter - BILLABLE CODE

  • Use T43.615D for subsequent encounter - BILLABLE CODE

  • Use T43.615S for sequela - BILLABLE CODE

  • T43.616 for Underdosing of caffeine - NON-BILLABLE CODE

  • Use T43.616A for initial encounter - BILLABLE CODE

  • Use T43.616D for subsequent encounter - BILLABLE CODE

  • Use T43.616S for sequela - BILLABLE CODE

  • T43.62 for Poisoning by, adverse effect of and underdosing of amphetamines - NON-BILLABLE CODE

  • T43.621 for Poisoning by amphetamines, accidental (unintentional) - NON-BILLABLE CODE

  • Use T43.621A for initial encounter - BILLABLE CODE

  • Use T43.621D for subsequent encounter - BILLABLE CODE

  • Use T43.621S for sequela - BILLABLE CODE

  • T43.622 for Poisoning by amphetamines, intentional self-harm - NON-BILLABLE CODE

  • Use T43.622A for initial encounter - BILLABLE CODE

  • Use T43.622D for subsequent encounter - BILLABLE CODE

  • Use T43.622S for sequela - BILLABLE CODE

  • T43.623 for Poisoning by amphetamines, assault - NON-BILLABLE CODE

  • Use T43.623A for initial encounter - BILLABLE CODE

  • Use T43.623D for subsequent encounter - BILLABLE CODE

  • Use T43.623S for sequela - BILLABLE CODE

  • T43.624 for Poisoning by amphetamines, undetermined - NON-BILLABLE CODE

  • Use T43.624A for initial encounter - BILLABLE CODE

  • Use T43.624D for subsequent encounter - BILLABLE CODE

  • Use T43.624S for sequela - BILLABLE CODE

  • T43.625 for Adverse effect of amphetamines - NON-BILLABLE CODE

  • Use T43.625A for initial encounter - BILLABLE CODE

  • Use T43.625D for subsequent encounter - BILLABLE CODE

  • Use T43.625S for sequela - BILLABLE CODE

  • T43.626 for Underdosing of amphetamines - NON-BILLABLE CODE

  • Use T43.626A for initial encounter - BILLABLE CODE

  • Use T43.626D for subsequent encounter - BILLABLE CODE

  • Use T43.626S for sequela - BILLABLE CODE

  • T43.63 for Poisoning by, adverse effect of and underdosing of methylphenidate - NON-BILLABLE CODE

  • T43.631 for Poisoning by methylphenidate, accidental (unintentional) - NON-BILLABLE CODE

  • Use T43.631A for initial encounter - BILLABLE CODE

  • Use T43.631D for subsequent encounter - BILLABLE CODE

  • Use T43.631S for sequela - BILLABLE CODE

  • T43.632 for Poisoning by methylphenidate, intentional self-harm - NON-BILLABLE CODE

  • Use T43.632A for initial encounter - BILLABLE CODE

  • Use T43.632D for subsequent encounter - BILLABLE CODE

  • Use T43.632S for sequela - BILLABLE CODE

  • T43.633 for Poisoning by methylphenidate, assault - NON-BILLABLE CODE

  • Use T43.633A for initial encounter - BILLABLE CODE

  • Use T43.633D for subsequent encounter - BILLABLE CODE

  • Use T43.633S for sequela - BILLABLE CODE

  • T43.634 for Poisoning by methylphenidate, undetermined - NON-BILLABLE CODE

  • Use T43.634A for initial encounter - BILLABLE CODE

  • Use T43.634D for subsequent encounter - BILLABLE CODE

  • Use T43.634S for sequela - BILLABLE CODE

  • T43.635 for Adverse effect of methylphenidate - NON-BILLABLE CODE

  • Use T43.635A for initial encounter - BILLABLE CODE

  • Use T43.635D for subsequent encounter - BILLABLE CODE

  • Use T43.635S for sequela - BILLABLE CODE

  • T43.636 for Underdosing of methylphenidate - NON-BILLABLE CODE

  • Use T43.636A for initial encounter - BILLABLE CODE

  • Use T43.636D for subsequent encounter - BILLABLE CODE

  • Use T43.636S for sequela - BILLABLE CODE

  • T43.64 for Poisoning by ecstasy - NON-BILLABLE CODE

  • T43.641 for Poisoning by ecstasy, accidental (unintentional) - NON-BILLABLE CODE

  • Use T43.641A for initial encounter - BILLABLE CODE

  • Use T43.641D for subsequent encounter - BILLABLE CODE

  • Use T43.641S for sequela - BILLABLE CODE

  • T43.642 for Poisoning by ecstasy, intentional self-harm - NON-BILLABLE CODE

  • Use T43.642A for initial encounter - BILLABLE CODE

  • Use T43.642D for subsequent encounter - BILLABLE CODE

  • Use T43.642S for sequela - BILLABLE CODE

  • T43.643 for Poisoning by ecstasy, assault - NON-BILLABLE CODE

  • Use T43.643A for initial encounter - BILLABLE CODE

  • Use T43.643D for subsequent encounter - BILLABLE CODE

  • Use T43.643S for sequela - BILLABLE CODE

  • T43.644 for Poisoning by ecstasy, undetermined - NON-BILLABLE CODE

  • Use T43.644A for initial encounter - BILLABLE CODE

  • Use T43.644D for subsequent encounter - BILLABLE CODE

  • Use T43.644S for sequela - BILLABLE CODE

  • T43.65 for Poisoning by, adverse effect of and underdosing of methamphetamines - NON-BILLABLE CODE

  • T43.651 for Poisoning by methamphetamines accidental (unintentional) - NON-BILLABLE CODE

  • Use T43.651A for initial encounter - BILLABLE CODE

  • Use T43.651D for subsequent encounter - BILLABLE CODE

  • Use T43.651S for sequela - BILLABLE CODE

  • T43.652 for Poisoning by methamphetamines intentional self-harm - NON-BILLABLE CODE

  • Use T43.652A for initial encounter - BILLABLE CODE

  • Use T43.652D for subsequent encounter - BILLABLE CODE

  • Use T43.652S for sequela - BILLABLE CODE

  • T43.653 for Poisoning by methamphetamines, assault - NON-BILLABLE CODE

  • Use T43.653A for initial encounter - BILLABLE CODE

  • Use T43.653D for subsequent encounter - BILLABLE CODE

  • Use T43.653S for sequela - BILLABLE CODE

  • T43.654 for Poisoning by methamphetamines, undetermined - NON-BILLABLE CODE

  • Use T43.654A for initial encounter - BILLABLE CODE

  • Use T43.654D for subsequent encounter - BILLABLE CODE

  • Use T43.654S for sequela - BILLABLE CODE

  • T43.655 for Adverse effect of methamphetamines - NON-BILLABLE CODE

  • Use T43.655A for initial encounter - BILLABLE CODE

  • Use T43.655D for subsequent encounter - BILLABLE CODE

  • Use T43.655S for sequela - BILLABLE CODE

  • T43.656 for Underdosing of methamphetamines - NON-BILLABLE CODE

  • Use T43.656A for initial encounter - BILLABLE CODE

  • Use T43.656D for subsequent encounter - BILLABLE CODE

  • Use T43.656S for sequela - BILLABLE CODE

  • T43.69 for Poisoning by, adverse effect of and underdosing of other psychostimulants - NON-BILLABLE CODE

  • T43.691 for Poisoning by other psychostimulants, accidental (unintentional) - NON-BILLABLE CODE

  • Use T43.691A for initial encounter - BILLABLE CODE

  • Use T43.691D for subsequent encounter - BILLABLE CODE

  • Use T43.691S for sequela - BILLABLE CODE

  • T43.692 for Poisoning by other psychostimulants, intentional self-harm - NON-BILLABLE CODE

  • Use T43.692A for initial encounter - BILLABLE CODE

  • Use T43.692D for subsequent encounter - BILLABLE CODE

  • Use T43.692S for sequela - BILLABLE CODE

  • T43.693 for Poisoning by other psychostimulants, assault - NON-BILLABLE CODE

  • Use T43.693A for initial encounter - BILLABLE CODE

  • Use T43.693D for subsequent encounter - BILLABLE CODE

  • Use T43.693S for sequela - BILLABLE CODE

  • T43.694 for Poisoning by other psychostimulants, undetermined - NON-BILLABLE CODE

  • Use T43.694A for initial encounter - BILLABLE CODE

  • Use T43.694D for subsequent encounter - BILLABLE CODE

  • Use T43.694S for sequela - BILLABLE CODE

  • T43.695 for Adverse effect of other psychostimulants - NON-BILLABLE CODE

  • Use T43.695A for initial encounter - BILLABLE CODE

  • Use T43.695D for subsequent encounter - BILLABLE CODE

  • Use T43.695S for sequela - BILLABLE CODE

  • T43.696 for Underdosing of other psychostimulants - NON-BILLABLE CODE

  • Use T43.696A for initial encounter - BILLABLE CODE

  • Use T43.696D for subsequent encounter - BILLABLE CODE

  • Use T43.696S for sequela - BILLABLE CODE

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 psychotropic drugs, not elsewhere classified (T43). Use the following options for the aplicable episode of care:

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

Tabular List of Diseases and Injuries

The following annotation back-references are applicable to this diagnosis code. The Tabular List of Diseases and Injuries is a list of ICD-10-CM codes, organized "head to toe" into chapters and sections with coding notes and guidance for inclusions, exclusions, descriptions and more.


Type 1 Excludes

Type 1 Excludes
A type 1 excludes note is a pure excludes note. It means "NOT CODED HERE!" An Excludes1 note indicates that the code excluded should never be used at the same time as the code above the Excludes1 note. An Excludes1 is used when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.
  • poisoning by, adverse effect of and underdosing of cocaine T40.5

Patient Education


Drug Reactions

Most of the time, medicines make our lives better. They reduce aches and pains, fight infections, and control problems such as high blood pressure or diabetes. But medicines can also cause unwanted reactions, such as drug interactions, side effects, and allergies.

What is a drug interaction?

A drug interaction is a change in the way a drug acts in the body when taken with certain other drugs, foods, or supplements or when taken while you have certain medical conditions. Examples include:

  • Two drugs, such as aspirin and blood thinners
  • Drugs and food, such as statins and grapefruit
  • Drugs and supplements, such as gingko and blood thinners
  • Drugs and medical conditions, such as aspirin and peptic ulcers

Interactions could cause a drug to be more or less effective, cause side effects, or change the way one or both drugs work.

What are side effects?

Side effects are unwanted, usually unpleasant, effects caused by medicines. Most are mild, such as a stomachache, dry mouth, or drowsiness, and go away after you stop taking the medicine. Others can be more serious. Sometimes a drug can interact with a disease that you have and cause a side effect. For example, if you have a heart condition, certain decongestants can cause you to have a rapid heartbeat.

What are drug allergies?

Drug allergies are another type of reaction. They can range from mild to life-threatening. Skin reactions, such as hives and rashes, are the most common type. Anaphylaxis, a serious allergic reaction, is less common.

How can I stay safe when taking medicines?

When you start a new prescription or over-the-counter medicine, make sure you understand how to take it correctly. Know which other medicines, foods, and supplements you need to avoid. Always talk to your health care provider or pharmacist if you have questions about your medicines.


[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.