2021 ICD-10-CM Code T40.906

Underdosing of unspecified psychodysleptics [hallucinogens]

Version 2021
Replaced Code
Non-Billable Code
Unspecified Code
Underdosing

Not Valid for Submission

T40.906 is a "header" nonspecific and non-billable diagnosis code code, consider using a code with a higher level of specificity for a diagnosis of underdosing of unspecified psychodysleptics [hallucinogens]. The code is NOT valid for the year 2021 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.

Unspecified diagnosis codes like T40.906 are acceptable when clinical information is unknown or not available about a particular condition. Although a more specific code is preferable, unspecified codes should be used when such codes most accurately reflect what is known about a patient's condition. Specific diagnosis codes should not be used if not supported by the patient's medical record.

ICD-10:T40.906
Short Description:Underdosing of unspecified psychodysleptics [hallucinogens]
Long Description:Underdosing of unspecified psychodysleptics [hallucinogens]

Code Classification

Specific Coding for Underdosing of unspecified psychodysleptics [hallucinogens]

Header codes like T40.906 require more digits to indicate the appropriate level of specificity. Consider using any of the following ICD-10 codes with a higher level of specificity when coding for underdosing of unspecified psychodysleptics [hallucinogens]:

Replaced Code

This code was replaced in the 2021 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, 2020. This code was replaced for the FY 2021 (October 1, 2020 - September 30, 2021).


  • K59.03 - Drug induced constipation

Table of Drugs and Chemicals

The code T40.906 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. According to ICD-10 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
Hallucinogen NOST40.901T40.902T40.903T40.904T40.905T40.906
Hallucinogen NOS
  »specified NEC
T40.901T40.902T40.903T40.904T40.905T40.906
MegahallucinogenT40.901T40.902T40.903T40.904T40.905T40.906
Psychodysleptic drug NOST40.901T40.902T40.903T40.904T40.905T40.906
Psychodysleptic drug NOS
  »specified NEC
T40.901T40.902T40.903T40.904T40.905T40.906
Psychotomimetic agentsT40.901T40.902T40.903T40.904T40.905T40.906

Information for Patients


Medication Errors

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Food and Drug Administration


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Code History

  • 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 (First year ICD-10-CM implemented into the HIPAA code set)