ICD-10 Code T43.016

Underdosing of tricyclic antidepressants

Version 2019 Replaced Code Non-Billable Code Underdosing
ICD-10:T43.016
Short Description:Underdosing of tricyclic antidepressants
Long Description:Underdosing of tricyclic antidepressants

Not Valid for Submission

ICD-10 T43.016 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 tricyclic antidepressants. The code is NOT valid for the year 2019 for the submission of HIPAA-covered transactions.

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

  • T43.016A - Underdosing of tricyclic antidepressants, initial encounter
  • T43.016D - Underdosing of tricyclic antidepressants, subsequent encounter
  • T43.016S - Underdosing of tricyclic antidepressants, sequela

Deleted Code

This code was deleted in the 2019 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, 2018. This code was replaced for the FY 2019 (October 1, 2018 - September 30, 2019).

  • 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)

Information for Medical Professionals

Diagnostic Related Groups

The Diagnostic Related Groups (DRGs) are a patient classification scheme which provides a means of relating the type of patients a hospital treats. The DRGs divides all possible principal diagnoses into mutually exclusive principal diagnosis areas referred to as Major Diagnostic Categories (MDC). The diagnosis code T43.016 is grouped in the following groups for version MS-DRG V36.0 applicable from 10/01/2018 through 09/30/2019.

  • 949 - AFTERCARE WITH CC/MCC
  • 949 - AFTERCARE WITH CC/MCC
  • 950 - AFTERCARE WITHOUT CC/MCC
  • 950 - AFTERCARE WITHOUT CC/MCC

Table of Drugs and Chemicals

The code T43.016 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
AllegronT43.011T43.012T43.013T43.014T43.015T43.016
AmineptineT43.011T43.012T43.013T43.014T43.015T43.016
AmitriptylineT43.011T43.012T43.013T43.014T43.015T43.016
AmitriptylinoxideT43.011T43.012T43.013T43.014T43.015T43.016
AmoxapineT43.011T43.012T43.013T43.014T43.015T43.016
ButriptylineT43.011T43.012T43.013T43.014T43.015T43.016
ChlorimipramineT43.011T43.012T43.013T43.014T43.015T43.016
CianopramineT43.011T43.012T43.013T43.014T43.015T43.016
ClomipramineT43.011T43.012T43.013T43.014T43.015T43.016
DesipramineT43.011T43.012T43.013T43.014T43.015T43.016
DesmethylimipramineT43.011T43.012T43.013T43.014T43.015T43.016
DibenzepinT43.011T43.012T43.013T43.014T43.015T43.016
DosulepinT43.011T43.012T43.013T43.014T43.015T43.016
DothiepinT43.011T43.012T43.013T43.014T43.015T43.016
DoxepinT43.011T43.012T43.013T43.014T43.015T43.016
ImipramineT43.011T43.012T43.013T43.014T43.015T43.016
IprindoleT43.011T43.012T43.013T43.014T43.015T43.016
LaroxylT43.011T43.012T43.013T43.014T43.015T43.016
LofepramineT43.011T43.012T43.013T43.014T43.015T43.016
MelitracenT43.011T43.012T43.013T43.014T43.015T43.016
MetapramineT43.011T43.012T43.013T43.014T43.015T43.016
NortriptylineT43.011T43.012T43.013T43.014T43.015T43.016
NoxiptilineT43.011T43.012T43.013T43.014T43.015T43.016
OpipramolT43.011T43.012T43.013T43.014T43.015T43.016
PertofraneT43.011T43.012T43.013T43.014T43.015T43.016
ProtriptylineT43.011T43.012T43.013T43.014T43.015T43.016
QuinupramineT43.011T43.012T43.013T43.014T43.015T43.016
SarotenT43.011T43.012T43.013T43.014T43.015T43.016
SinequanT43.011T43.012T43.013T43.014T43.015T43.016
TofranilT43.011T43.012T43.013T43.014T43.015T43.016
TrimipramineT43.011T43.012T43.013T43.014T43.015T43.016
TryptizolT43.011T43.012T43.013T43.014T43.015T43.016

Information for Patients


Antidepressants

Also called: SSRIs, Selective serotonin reuptake inhibitors, Tricyclic antidepressants

Antidepressants are medicines that treat depression. Your doctor can prescribe them for you. They work to balance some of the natural chemicals in our brains. It may take several weeks for them to help. There are several types of antidepressants. You and your doctor may have to try a few before finding what works best for you.

Antidepressants may cause mild side effects that usually do not last long. These may include headache, nausea, sleep problems, restlessness, and sexual problems. Tell your doctor if you have any side effects. You should also let your doctor know if you take any other medicines, vitamins, or herbal supplements.

It is important to keep taking your medicines, even if you feel better. Do not stop taking your medicines without talking to your doctor. You often need to stop antidepressants gradually.

NIH: National Institute of Mental Health

  • Depression - stopping your medicines (Medical Encyclopedia)

[Read More]

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

  • 6 Tips to Avoid Medication Mistakes (Food and Drug Administration)
  • How and when to get rid of unused medicines (Medical Encyclopedia)
  • Keeping your medications organized (Medical Encyclopedia)
  • Medication safety during your hospital stay (Medical Encyclopedia)
  • Medication safety: Filling your prescription (Medical Encyclopedia)
  • Storing your medicines (Medical Encyclopedia)
  • Taking medicine at home - create a routine (Medical Encyclopedia)

[Read 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.