ICD-10 Code T43.3X6

Underdosing of phenothiazine antipsychotics and neuroleptics

Version 2019 Replaced Code Non-Billable Code Underdosing

Not Valid for Submission

T43.3X6 is a "header" nonspecific and non-billable code code, consider using a code with a higher level of specificity for a diagnosis of underdosing of phenothiazine antipsychotics and neuroleptics. The code is NOT valid for the year 2020 for the submission of HIPAA-covered transactions.

ICD-10: T43.3X6
Short Description:Underdosing of phenothiazine antipsychotics and neuroleptics
Long Description:Underdosing of phenothiazine antipsychotics and neuroleptics

Consider the following ICD-10 codes with a higher level of specificity:

  • T43.3X6A - Underdosing of phenothiazine antipsychotics and neuroleptics, initial encounter
  • T43.3X6D - Underdosing of phenothiazine antipsychotics and neuroleptics, subsequent encounter
  • T43.3X6S - Underdosing of phenothiazine antipsychotics and neuroleptics, sequela

Replaced Code

This code was replaced in the 2020 ICD-10 code set with the code(s) listed below. The National Center for Health Statistics (NCHS) has published an update to the ICD-10-CM diagnosis codes which became effective October 1, 2019. This code was replaced for the FY 2020 (October 1, 2019 - September 30, 2020).

  • K59.03 - Drug induced constipation

Code Classification

  • Injury, poisoning and certain other consequences of external causes (S00–T98)
    • Poisoning by, adverse effect of and underdosing of drugs, medicaments and biological substances (T36-T50)
      • Psychotropic drugs, not elsewhere classified (T43)

Code History

  • FY 2016 - New Code, effective from 10/1/2015 through 9/30/2016
    (first year ICD-10-CM implemented into the HIPAA mandated code set)
  • FY 2017 - No Change, effective from 10/1/2016 through 9/30/2017
  • FY 2018 - No Change, effective from 10/1/2017 through 9/30/2018
  • FY 2019 - No Change, effective from 10/1/2018 through 9/30/2019
  • FY 2020 - No Change, effective from 10/1/2019 through 9/30/2020

Information for Medical Professionals

Table of Drugs and Chemicals

The code T43.3X6 is included 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. 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.

Substance Poisoning
Accidental
(unintentional)
Poisoning
Accidental
self-harm
Poisoning
Assault
Poisoning
Undetermined
Adverse
effect
Underdosing
AcepromazineT43.3X1T43.3X2T43.3X3T43.3X4T43.3X5T43.3X6
AcetophenazineT43.3X1T43.3X2T43.3X3T43.3X4T43.3X5T43.3X6
AlimemazineT43.3X1T43.3X2T43.3X3T43.3X4T43.3X5T43.3X6
ButaperazineT43.3X1T43.3X2T43.3X3T43.3X4T43.3X5T43.3X6
CarfenazineT43.3X1T43.3X2T43.3X3T43.3X4T43.3X5T43.3X6
CarphenazineT43.3X1T43.3X2T43.3X3T43.3X4T43.3X5T43.3X6
ChlorpromazineT43.3X1T43.3X2T43.3X3T43.3X4T43.3X5T43.3X6
CompazineT43.3X1T43.3X2T43.3X3T43.3X4T43.3X5T43.3X6
CyamemazineT43.3X1T43.3X2T43.3X3T43.3X4T43.3X5T43.3X6
DimetotiazineT43.3X1T43.3X2T43.3X3T43.3X4T43.3X5T43.3X6
DioxopromethazineT43.3X1T43.3X2T43.3X3T43.3X4T43.3X5T43.3X6
DixyrazineT43.3X1T43.3X2T43.3X3T43.3X4T43.3X5T43.3X6
FentazinT43.3X1T43.3X2T43.3X3T43.3X4T43.3X5T43.3X6
FluopromazineT43.3X1T43.3X2T43.3X3T43.3X4T43.3X5T43.3X6
FluphenazineT43.3X1T43.3X2T43.3X3T43.3X4T43.3X5T43.3X6
IsopromethazineT43.3X1T43.3X2T43.3X3T43.3X4T43.3X5T43.3X6
LargactilT43.3X1T43.3X2T43.3X3T43.3X4T43.3X5T43.3X6
LevomepromazineT43.3X1T43.3X2T43.3X3T43.3X4T43.3X5T43.3X6
LevopromazineT43.3X1T43.3X2T43.3X3T43.3X4T43.3X5T43.3X6
MellarilT43.3X1T43.3X2T43.3X3T43.3X4T43.3X5T43.3X6
MepazineT43.3X1T43.3X2T43.3X3T43.3X4T43.3X5T43.3X6
MequitazineT43.3X1T43.3X2T43.3X3T43.3X4T43.3X5T43.3X6
MesoridazineT43.3X1T43.3X2T43.3X3T43.3X4T43.3X5T43.3X6
MethdilazineT43.3X1T43.3X2T43.3X3T43.3X4T43.3X5T43.3X6
MethopromazineT43.3X1T43.3X2T43.3X3T43.3X4T43.3X5T43.3X6
MethotrimeprazineT43.3X1T43.3X2T43.3X3T43.3X4T43.3X5T43.3X6
MethoxypromazineT43.3X1T43.3X2T43.3X3T43.3X4T43.3X5T43.3X6
MetofenazateT43.3X1T43.3X2T43.3X3T43.3X4T43.3X5T43.3X6
OxomemazineT43.3X1T43.3X2T43.3X3T43.3X4T43.3X5T43.3X6
PecazineT43.3X1T43.3X2T43.3X3T43.3X4T43.3X5T43.3X6
PerazineT43.3X1T43.3X2T43.3X3T43.3X4T43.3X5T43.3X6
PericiazineT43.3X1T43.3X2T43.3X3T43.3X4T43.3X5T43.3X6
PerphenazineT43.3X1T43.3X2T43.3X3T43.3X4T43.3X5T43.3X6
Phenothiazine (psychotropic) NECT43.3X1T43.3X2T43.3X3T43.3X4T43.3X5T43.3X6
Phenothiazine (psychotropic) NEC
  »insecticide
T43.3X1T43.3X2T43.3X3T43.3X4T43.3X5T43.3X6
PiperacetazineT43.3X1T43.3X2T43.3X3T43.3X4T43.3X5T43.3X6
PipotiazineT43.3X1T43.3X2T43.3X3T43.3X4T43.3X5T43.3X6
PlegicilT43.3X1T43.3X2T43.3X3T43.3X4T43.3X5T43.3X6
ProchlorperazineT43.3X1T43.3X2T43.3X3T43.3X4T43.3X5T43.3X6
PromazineT43.3X1T43.3X2T43.3X3T43.3X4T43.3X5T43.3X6
Promethazine (teoclate)T43.3X1T43.3X2T43.3X3T43.3X4T43.3X5T43.3X6
Propylaminopheno-thiazineT43.3X1T43.3X2T43.3X3T43.3X4T43.3X5T43.3X6
SparineT43.3X1T43.3X2T43.3X3T43.3X4T43.3X5T43.3X6
StelazineT43.3X1T43.3X2T43.3X3T43.3X4T43.3X5T43.3X6
StemetilT43.3X1T43.3X2T43.3X3T43.3X4T43.3X5T43.3X6
SulforidazineT43.3X1T43.3X2T43.3X3T43.3X4T43.3X5T43.3X6
Thiazinamium metilsulfateT43.3X1T43.3X2T43.3X3T43.3X4T43.3X5T43.3X6
ThiethylperazineT43.3X1T43.3X2T43.3X3T43.3X4T43.3X5T43.3X6
ThiopropazateT43.3X1T43.3X2T43.3X3T43.3X4T43.3X5T43.3X6
ThioproperazineT43.3X1T43.3X2T43.3X3T43.3X4T43.3X5T43.3X6
ThioridazineT43.3X1T43.3X2T43.3X3T43.3X4T43.3X5T43.3X6
ThorazineT43.3X1T43.3X2T43.3X3T43.3X4T43.3X5T43.3X6
TindalT43.3X1T43.3X2T43.3X3T43.3X4T43.3X5T43.3X6
TrifluoperazineT43.3X1T43.3X2T43.3X3T43.3X4T43.3X5T43.3X6
TriflupromazineT43.3X1T43.3X2T43.3X3T43.3X4T43.3X5T43.3X6

Information for Patients


Medication Errors

Medicines treat infectious diseases, prevent problems from chronic diseases, and ease pain. But medicines can also cause harmful reactions if not used correctly. Errors can happen in the hospital, at the health care provider's office, at the pharmacy, or at home. You can help prevent errors by

  • Knowing your medicines. When you get a prescription, ask the name of the medicine and check to make sure that the pharmacy gave you the right medicine. Make sure that you understand how often you should take the medicine and how long you should take it.
  • Keeping a list of medicines.
    • Write down all of the medicines that you are taking, including the names of your medicines, how much you take, and when you take them. Make sure to include any over-the-counter medicines, vitamins, supplements, and herbs that you take.
    • List the medicines that you are allergic to or that have caused you problems in the past.
    • Take this list with you every time you see a health care provider.
  • Reading medicine labels and following the directions. Don't just rely on your memory - read the medication label every time. Be especially careful when giving medicines to children.
  • Asking questions. If you don't know the answers to these questions, ask your health care provider or pharmacist:
    • Why am I taking this medicine?
    • What are the common side effects?
    • What should I do if I have side effects?
    • When should I stop this medicine?
    • Can I take this medicine with the other medicines and supplements on my list?
    • Do I need to avoid certain foods or alcohol while taking this medicine?

Food and Drug Administration


[Learn More]

ICD-10 Footnotes

General Equivalence Map Definitions
The ICD-10 and ICD-9 GEMs are used to facilitate linking between the diagnosis codes in ICD-9-CM and the new ICD-10-CM code set. The GEMs are the raw material from which providers, health information vendors and payers can derive specific applied mappings to meet their needs.

  • Approximate Flag - The approximate flag is on, indicating that the relationship between the code in the source system and the code in the target system is an approximate equivalent.
  • No Map Flag - The no map flag indicates that a code in the source system is not linked to any code in the target system.
  • Combination Flag - The combination flag indicates that more than one code in the target system is required to satisfy the full equivalent meaning of a code in the source system.