2024 ICD-10-CM Diagnosis Code T40.2X6A

Underdosing of other opioids, initial encounter

ICD-10-CM Code:
T40.2X6A
ICD-10 Code for:
Underdosing of other opioids, initial encounter
Is Billable?
Yes - Valid for Submission
Chronic Condition Indicator: [1]
Not chronic
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 narcotics and psychodysleptics [hallucinogens]
        (T40)

T40.2X6A is a billable diagnosis code used to specify a medical diagnosis of underdosing of other opioids, initial encounter. The code is valid during the current fiscal year for the submission of HIPAA-covered transactions from October 01, 2023 through September 30, 2024.

This code describes a circumstance which influences the patient's health status but not a current illness or injury. The code is unacceptable as a principal diagnosis.

T40.2X6A is an initial encounter code, includes a 7th character and should be used while the patient is receiving active treatment for a condition like underdosing of other opioids. According to ICD-10-CM Guidelines an "initial encounter" doesn't necessarily means "initial visit". The 7th character should be used when the patient is undergoing active treatment regardless if new or different providers saw the patient over the course of a treatment. The appropriate 7th character codes should also be used even if the patient delayed seeking treatment for a condition.

Clinical Classification

Clinical Information

  • Codeine

    an opioid analgesic related to morphine but with less potent analgesic properties and mild sedative effects. it also acts centrally to suppress cough.
  • Dextrorphan

    dextro form of levorphanol. it acts as a noncompetitive nmda receptor antagonist, among other effects, and has been proposed as a neuroprotective agent. it is also a metabolite of dextromethorphan.
  • Ethylmorphine

    a narcotic analgesic and antitussive. it is metabolized in the liver by ethylmorphine-n-demethylase and used as an indicator of liver function.
  • Ethylmorphine-N-Demethylase

    a drug-metabolizing enzyme of the hepatic microsomal oxidase system which catalyzes the oxidation of the n-methyl group of ethylmorphine with the formation of formaldehyde.
  • Etorphine

    a narcotic analgesic morphinan used as a sedative in veterinary practice.
  • Hydrocodone

    narcotic analgesic related to codeine, but more potent and more addicting by weight. it is used also as cough suppressant.
  • Hydromorphone

    an opioid analgesic made from morphine and used mainly as an analgesic. it has a shorter duration of action than morphine.
  • Glucuronosyltransferase

    a family of enzymes accepting a wide range of substrates, including phenols, alcohols, amines, and fatty acids. they function as drug-metabolizing enzymes that catalyze the conjugation of udpglucuronic acid to a variety of endogenous and exogenous compounds. ec 2.4.1.17.
  • Morphine

    the principal alkaloid in opium and the prototype opiate analgesic and narcotic. morphine has widespread effects in the central nervous system and on smooth muscle.
  • Morphine Dependence

    strong dependence, both physiological and emotional, upon morphine.
  • Morphine Derivatives

    analogs or derivatives of morphine.
  • Receptors, Opioid, mu

    a class of opioid receptors recognized by its pharmacological profile. mu opioid receptors bind, in decreasing order of affinity, endorphins, dynorphins, met-enkephalin, and leu-enkephalin. they have also been shown to be molecular receptors for morphine.
  • Oxycodone

    a semisynthetic derivative of codeine.
  • Oxymorphone

    an opioid analgesic with actions and uses similar to those of morphine, apart from an absence of cough suppressant activity. it is used in the treatment of moderate to severe pain, including pain in obstetrics. it may also be used as an adjunct to anesthesia. (from martindale, the extra pharmacopoeia, 30th ed, p1092)
  • Thebaine

    a drug that is derived from opium, which contains from 0.3-1.5% thebaine depending on its origin. it produces strychnine-like convulsions rather than narcosis. it may be habit-forming and is a controlled substance (opiate) listed in the u.s. code of federal regulations, title 21 part 1308.12 (1985). (from merck index, 11th ed)

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 narcotics and psychodysleptics [hallucinogens] (T40). Use the following options for the aplicable episode of care:

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

Code Edits

The Medicare Code Editor (MCE) detects and reports errors in the coding of claims data. The following ICD-10-CM Code Edits are applicable to this code:

  • Unacceptable principal diagnosis - There are selected codes that describe a circumstance which influences an individual's health status but not a current illness or injury, or codes that are not specific manifestations but may be due to an underlying cause. These codes are considered unacceptable as a principal diagnosis.

Convert T40.2X6A to ICD-9-CM

  • ICD-9-CM Code: -
    No Map Flag -

Table of Drugs and Chemicals

The parent code T40.2X6 of the current diagnosis 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
14-hydroxydihydro-morphinoneT40.2X1T40.2X2T40.2X3T40.2X4T40.2X5T40.2X6
AcemorphanT40.2X1T40.2X2T40.2X3T40.2X4T40.2X5T40.2X6
AlvodineT40.2X1T40.2X2T40.2X3T40.2X4T40.2X5T40.2X6
BenzomorphanT40.2X1T40.2X2T40.2X3T40.2X4T40.2X5T40.2X6
CodeineT40.2X1T40.2X2T40.2X3T40.2X4T40.2X5T40.2X6
DemerolT40.2X1T40.2X2T40.2X3T40.2X4T40.2X5T40.2X6
DesocodeineT40.2X1T40.2X2T40.2X3T40.2X4T40.2X5T40.2X6
DextrorphanT40.2X1T40.2X2T40.2X3T40.2X4T40.2X5T40.2X6
DifencloxazineT40.2X1T40.2X2T40.2X3T40.2X4T40.2X5T40.2X6
DihydrocodeineT40.2X1T40.2X2T40.2X3T40.2X4T40.2X5T40.2X6
DihydrocodeinoneT40.2X1T40.2X2T40.2X3T40.2X4T40.2X5T40.2X6
DihydrohydroxycodeinoneT40.2X1T40.2X2T40.2X3T40.2X4T40.2X5T40.2X6
DihydrohydroxymorphinoneT40.2X1T40.2X2T40.2X3T40.2X4T40.2X5T40.2X6
DihydroisocodeineT40.2X1T40.2X2T40.2X3T40.2X4T40.2X5T40.2X6
DihydromorphinoneT40.2X1T40.2X2T40.2X3T40.2X4T40.2X5T40.2X6
DihydroxycodeinoneT40.2X1T40.2X2T40.2X3T40.2X4T40.2X5T40.2X6
DilaudidT40.2X1T40.2X2T40.2X3T40.2X4T40.2X5T40.2X6
DioninT40.2X1T40.2X2T40.2X3T40.2X4T40.2X5T40.2X6
DrocodeT40.2X1T40.2X2T40.2X3T40.2X4T40.2X5T40.2X6
DromoranT40.2X1T40.2X2T40.2X3T40.2X4T40.2X5T40.2X6
EthylmorphineT40.2X1T40.2X2T40.2X3T40.2X4T40.2X5T40.2X6
EtorphineT40.2X1T40.2X2T40.2X3T40.2X4T40.2X5T40.2X6
EucodalT40.2X1T40.2X2T40.2X3T40.2X4T40.2X5T40.2X6
HeptalginT40.2X1T40.2X2T40.2X3T40.2X4T40.2X5T40.2X6
HycodanT40.2X1T40.2X2T40.2X3T40.2X4T40.2X5T40.2X6
HydrocodoneT40.2X1T40.2X2T40.2X3T40.2X4T40.2X5T40.2X6
HydromorphinoneT40.2X1T40.2X2T40.2X3T40.2X4T40.2X5T40.2X6
HydromorphoneT40.2X1T40.2X2T40.2X3T40.2X4T40.2X5T40.2X6
HydroxydihydrocodeinoneT40.2X1T40.2X2T40.2X3T40.2X4T40.2X5T40.2X6
LeritineT40.2X1T40.2X2T40.2X3T40.2X4T40.2X5T40.2X6
Levo-dromoranT40.2X1T40.2X2T40.2X3T40.2X4T40.2X5T40.2X6
MethylmorphineT40.2X1T40.2X2T40.2X3T40.2X4T40.2X5T40.2X6
MetoponT40.2X1T40.2X2T40.2X3T40.2X4T40.2X5T40.2X6
MorfinT40.2X1T40.2X2T40.2X3T40.2X4T40.2X5T40.2X6
MorphineT40.2X1T40.2X2T40.2X3T40.2X4T40.2X5T40.2X6
Morphine
  »antagonist
T40.2X1T40.2X2T40.2X3T40.2X4T40.2X5T40.2X6
NisentilT40.2X1T40.2X2T40.2X3T40.2X4T40.2X5T40.2X6
NumorphanT40.2X1T40.2X2T40.2X3T40.2X4T40.2X5T40.2X6
Opioid NECT40.2X1T40.2X2T40.2X3T40.2X4T40.2X5T40.2X6
OxycodoneT40.2X1T40.2X2T40.2X3T40.2X4T40.2X5T40.2X6
OxymorphoneT40.2X1T40.2X2T40.2X3T40.2X4T40.2X5T40.2X6
ParacodinT40.2X1T40.2X2T40.2X3T40.2X4T40.2X5T40.2X6
ParzoneT40.2X1T40.2X2T40.2X3T40.2X4T40.2X5T40.2X6
PercodanT40.2X1T40.2X2T40.2X3T40.2X4T40.2X5T40.2X6
PiminodineT40.2X1T40.2X2T40.2X3T40.2X4T40.2X5T40.2X6
PrinadolT40.2X1T40.2X2T40.2X3T40.2X4T40.2X5T40.2X6
RacemorphanT40.2X1T40.2X2T40.2X3T40.2X4T40.2X5T40.2X6
ThebaineT40.2X1T40.2X2T40.2X3T40.2X4T40.2X5T40.2X6

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]

Pain Relievers

Pain relievers are medicines that reduce or relieve headaches, sore muscles, arthritis, or other aches and pains. There are many different pain medicines, and each one has advantages and risks. Some types of pain respond better to certain medicines than others. Each person may also have a slightly different response to a pain reliever.

Over-the-counter (OTC) medicines are good for many types of pain. There are two main types of OTC pain medicines: acetaminophen (Tylenol) and nonsteroidal anti-inflammatory drugs (NSAIDs). Aspirin, naproxen (Aleve), and ibuprofen (Advil, Motrin) are examples of OTC NSAIDs.

If OTC medicines don't relieve your pain, your doctor may prescribe something stronger. Many NSAIDs are also available at higher prescription doses. The most powerful pain relievers are opioids. They are very effective, but they can sometimes have serious side effects. There is also a risk of addiction. Because of the risks, you must use them only under a doctor's supervision.

There are many things you can do to help ease pain. Pain relievers are just one part of a pain treatment plan.


[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.

Footnotes

[1] Not chronic - A diagnosis code that does not fit the criteria for chronic condition (duration, ongoing medical treatment, and limitations) is considered not chronic. Some codes designated as not chronic are acute conditions. Other diagnosis codes that indicate a possible chronic condition, but for which the duration of the illness is not specified in the code description (i.e., we do not know the condition has lasted 12 months or longer) also are considered not chronic.