2024 ICD-10-CM Diagnosis Code T43.596

Underdosing of other antipsychotics and neuroleptics

ICD-10-CM Code:
T43.596
ICD-10 Code for:
Underdosing of other antipsychotics and neuroleptics
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)

T43.596 is a non-specific and non-billable diagnosis code code, consider using a code with a higher level of specificity for a diagnosis of underdosing of other antipsychotics and neuroleptics. 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 Underdosing of other antipsychotics and neuroleptics

Non-specific codes like T43.596 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 underdosing of other antipsychotics and neuroleptics:

  • Use T43.596A for initial encounter - BILLABLE CODE

  • Use T43.596D for subsequent encounter - BILLABLE CODE

  • Use T43.596S for sequela - BILLABLE CODE

Clinical Information

  • Amisulpride

    a benzamide derivative that is used as an antipsychotic agent for the treatment of schizophrenia. it is also used as an antidepressive agent.
  • Buspirone

    an anxiolytic agent and serotonin receptor agonist belonging to the azaspirodecanedione class of compounds. its structure is unrelated to those of the benzodiazapines, but it has an efficacy comparable to diazepam.
  • Droperidol

    a butyrophenone with general properties similar to those of haloperidol. it is used in conjunction with an opioid analgesic such as fentanyl to maintain the patient in a calm state of neuroleptanalgesia with indifference to surroundings but still able to cooperate with the surgeon. it is also used as a premedicant, as an antiemetic, and for the control of agitation in acute psychoses. (from martindale, the extra pharmacopoeia, 29th ed, p593)
  • Fluspirilene

    a long-acting injectable antipsychotic agent used for chronic schizophrenia.
  • Hydroxyzine

    a histamine h1 receptor antagonist that is effective in the treatment of chronic urticaria, dermatitis, and histamine-mediated pruritus. unlike its major metabolite cetirizine, it does cause drowsiness. it is also effective as an antiemetic, for relief of anxiety and tension, and as a sedative.
  • Loxapine

    an antipsychotic agent used in schizophrenia.
  • Meprobamate

    a carbamate with hypnotic, sedative, and some muscle relaxant properties, although in therapeutic doses reduction of anxiety rather than a direct effect may be responsible for muscle relaxation. meprobamate has been reported to have anticonvulsant actions against petit mal seizures, but not against grand mal seizures (which may be exacerbated). it is used in the treatment of anxiety disorders, and also for the short-term management of insomnia but has largely been superseded by the benzodiazepines. (from martindale, the extra pharmacopoeia, 30th ed, p603)
  • Molindone

    an indole derivative effective in schizophrenia and other psychoses and possibly useful in the treatment of the aggressive type of undersocialized conduct disorder. molindone has much lower affinity for d2 receptors than most antipsychotic agents and has a relatively low affinity for d1 receptors. it has only low to moderate affinity for cholinergic and alpha-adrenergic receptors. some electrophysiologic data from animals indicate that molindone has certain characteristics that resemble those of clozapine. (from ama drug evaluations annual, 1994, p283)
  • Olanzapine

    a benzodiazepine derivative that binds serotonin receptors; muscarinic receptors; histamine h1 receptors; adrenergic alpha-1 receptors; and dopamine receptors. it is an antipsychotic agent used in the treatment of schizophrenia; bipolar disorder; and major depressive disorder; it may also reduce nausea and vomiting in patients undergoing chemotherapy.
  • Penfluridol

    one of the long-acting antipsychotic agents used for maintenance or long-term therapy of schizophrenia and other psychotic disorders.
  • Pimozide

    a diphenylbutylpiperidine that is effective as an antipsychotic agent and as an alternative to haloperidol for the suppression of vocal and motor tics in patients with tourette syndrome. although the precise mechanism of action is unknown, blockade of postsynaptic dopamine receptors has been postulated. (from ama drug evaluations annual, 1994, p403)
  • Raclopride

    a substituted benzamide that has antipsychotic properties. it is a dopamine d2 receptor (see receptors, dopamine d2) antagonist.
  • Remoxipride

    an antipsychotic agent that is specific for dopamine d2 receptors. it has been shown to be effective in the treatment of schizophrenia.
  • Sulpiride

    a dopamine d2-receptor antagonist. it has been used therapeutically as an antidepressant, antipsychotic, and as a digestive aid. (from merck index, 11th ed)
  • Tetrabenazine

    a drug formerly used as an antipsychotic and treatment of various movement disorders. tetrabenazine blocks neurotransmitter uptake into adrenergic storage vesicles and has been used as a high affinity label for the vesicle transport system.

Coding Guidelines

Underdosing refers to taking less of a medication than is prescribed by a provider or a manufacturer's instruction. Codes for underdosing should never be assigned as principal or first-listed codes. If a patient has a relapse or exacerbation of the medical condition for which the drug is prescribed because of the reduction in dose, then the medical condition itself should be coded.

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

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
AminophenylpyridoneT43.591T43.592T43.593T43.594T43.595T43.596
AmisulprideT43.591T43.592T43.593T43.594T43.595T43.596
AmperozideT43.591T43.592T43.593T43.594T43.595T43.596
AmphenidoneT43.591T43.592T43.593T43.594T43.595T43.596
AzacyclonolT43.591T43.592T43.593T43.594T43.595T43.596
BenzperidinT43.591T43.592T43.593T43.594T43.595T43.596
BenzperidolT43.591T43.592T43.593T43.594T43.595T43.596
BuspironeT43.591T43.592T43.593T43.594T43.595T43.596
Captodiame, captodiamineT43.591T43.592T43.593T43.594T43.595T43.596
ClotiapineT43.591T43.592T43.593T43.594T43.595T43.596
DroperidolT43.591T43.592T43.593T43.594T43.595T43.596
EmylcamateT43.591T43.592T43.593T43.594T43.595T43.596
EnpiprazoleT43.591T43.592T43.593T43.594T43.595T43.596
EquanilT43.591T43.592T43.593T43.594T43.595T43.596
FluspirileneT43.591T43.592T43.593T43.594T43.595T43.596
HydroxyphenamateT43.591T43.592T43.593T43.594T43.595T43.596
HydroxyzineT43.591T43.592T43.593T43.594T43.595T43.596
LoxapineT43.591T43.592T43.593T43.594T43.595T43.596
MebutamateT43.591T43.592T43.593T43.594T43.595T43.596
MeprobamT43.591T43.592T43.593T43.594T43.595T43.596
MeprobamateT43.591T43.592T43.593T43.594T43.595T43.596
MiltownT43.591T43.592T43.593T43.594T43.595T43.596
MolindoneT43.591T43.592T43.593T43.594T43.595T43.596
MosapramineT43.591T43.592T43.593T43.594T43.595T43.596
NemonaprideT43.591T43.592T43.593T43.594T43.595T43.596
OlanzapineT43.591T43.592T43.593T43.594T43.595T43.596
OxanamideT43.591T43.592T43.593T43.594T43.595T43.596
OxypertineT43.591T43.592T43.593T43.594T43.595T43.596
PenfluridolT43.591T43.592T43.593T43.594T43.595T43.596
PhenaglycodolT43.591T43.592T43.593T43.594T43.595T43.596
PimozideT43.591T43.592T43.593T43.594T43.595T43.596
ProcalmidolT43.591T43.592T43.593T43.594T43.595T43.596
ProthipendylT43.591T43.592T43.593T43.594T43.595T43.596
RacloprideT43.591T43.592T43.593T43.594T43.595T43.596
RemoxiprideT43.591T43.592T43.593T43.594T43.595T43.596
SetoperoneT43.591T43.592T43.593T43.594T43.595T43.596
SpirileneT43.591T43.592T43.593T43.594T43.595T43.596
SulpirideT43.591T43.592T43.593T43.594T43.595T43.596
SultoprideT43.591T43.592T43.593T43.594T43.595T43.596
TaractanT43.591T43.592T43.593T43.594T43.595T43.596
TetrabenazineT43.591T43.592T43.593T43.594T43.595T43.596
TiaprideT43.591T43.592T43.593T43.594T43.595T43.596
TybamateT43.591T43.592T43.593T43.594T43.595T43.596
ZotepineT43.591T43.592T43.593T43.594T43.595T43.596
ZyprexaT43.591T43.592T43.593T43.594T43.595T43.596

Patient Education


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 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.