2024 ICD-10-CM Diagnosis Code T42.8X6A

Clinical Information

• Amantadine

  an antiviral that is used in the prophylactic or symptomatic treatment of influenza a. it is also used as an antiparkinsonian agent, to treat extrapyramidal reactions, and for postherpetic neuralgia. the mechanisms of its effects in movement disorders are not well understood but probably reflect an increase in synthesis and release of dopamine, with perhaps some inhibition of dopamine uptake.

• Baclofen

  a gamma-aminobutyric acid derivative that is a specific agonist of gaba-b receptors. it is used in the treatment of muscle spasticity, especially that due to spinal cord injuries. its therapeutic effects result from actions at spinal and supraspinal sites, generally the reduction of excitatory transmission.

• Receptors, GABA-B

  a subset of gaba receptors that signal through their interaction with heterotrimeric g-proteins.

• Benserazide

  an inhibitor of dopa decarboxylase that does not enter the central nervous system. it is often given with levodopa in the treatment of parkinsonism to prevent the conversion of levodopa to dopamine in the periphery, thereby increasing the amount that reaches the central nervous system and reducing the required dose. it has no antiparkinson actions when given alone.

• Bromocriptine

  a semisynthetic ergotamine alkaloid that is a dopamine d2 agonist. it suppresses prolactin secretion.

• Cabergoline

  an ergoline derivative and dopamine d2-agonist that inhibits prolactin secretion. it is used in the management of hyperprolactinemia, and to suppress lactation following childbirth for medical reasons. cabergoline is also used in the management of parkinson disease.

• Carisoprodol

  a centrally acting skeletal muscle relaxant whose mechanism of action is not completely understood but may be related to its sedative actions. it is used as an adjunct in the symptomatic treatment of musculoskeletal conditions associated with painful muscle spasm. (from martindale, the extra pharmacopoeia, 30th ed, p1202)

• Chlorphenesin

  a centrally acting muscle relaxant. its mode of action is unknown. (from martindale, the extra pharmacopoeia, 30th ed, p1203)

• Chlorzoxazone

  a centrally acting central muscle relaxant with sedative properties. it is claimed to inhibit muscle spasm by exerting an effect primarily at the level of the spinal cord and subcortical areas of the brain. (from martindale, the extra pharmacopoea, 30th ed, p1202)

• Dantrolene

  skeletal muscle relaxant that acts by interfering with excitation-contraction coupling in the muscle fiber. it is used in spasticity and other neuromuscular abnormalities. although the mechanism of action is probably not central, dantrolene is usually grouped with the central muscle relaxants.

• Levodopa

  the naturally occurring form of dihydroxyphenylalanine and the immediate precursor of dopamine. unlike dopamine itself, it can be taken orally and crosses the blood-brain barrier. it is rapidly taken up by dopaminergic neurons and converted to dopamine. it is used for the treatment of parkinsonian disorders and is usually given with agents that inhibit its conversion to dopamine outside of the central nervous system.

• Lisuride

  an ergot derivative that acts as an agonist at dopamine d2 receptors (dopamine agonists). it may also act as an antagonist at dopamine d1 receptors, and as an agonist at some serotonin receptors (serotonin receptor agonists).

• Mephenesin

  a centrally acting muscle relaxant with a short duration of action.

• Metergoline

  a dopamine agonist and serotonin antagonist. it has been used similarly to bromocriptine as a dopamine agonist and also for migraine disorders therapy.

• Methocarbamol

  a centrally acting muscle relaxant whose mode of action has not been established. it is used as an adjunct in the symptomatic treatment of musculoskeletal conditions associated with painful muscle spasm. (from martindale, the extra pharmacopoeia, 30th ed, p1206)

• Pergolide

  a long-acting dopamine agonist which has been used to treat parkinson disease and hyperprolactinemia but withdrawn from some markets due to potential for heart valve diseases.

• Piribedil

  a dopamine d2 agonist. it is used in the treatment of parkinson disease, particularly for alleviation of tremor. it has also been used for circulatory disorders and in other applications as a d2 agonist.

• Selegiline

  a selective, irreversible inhibitor of type b monoamine oxidase that is used for the treatment of newly diagnosed patients with parkinson disease, and for the treatment of depressive disorders. the compound without isomeric designation is deprenyl.

• Zoxazolamine

  a uricosuric and muscle relaxant. zoxazolamine acts centrally as a muscle relaxant, but the mechanism of its action is not understood.

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 antiepileptic, sedative- hypnotic and antiparkinsonism drugs (T42). 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 T42.8X6A to ICD-9-CM

• ICD-9-CM Code: -
  No Map Flag -

Table of Drugs and Chemicals

The parent code T42.8X6 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.

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

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.