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  6. 2024 ICD-10-CM Code T65

2024 ICD-10-CM Diagnosis Code T65

Toxic effect of other and unspecified substances

ICD-10-CM Code:
T65
ICD-10 Code for:
Toxic effect of other and unspecified substances
Is Billable?
Not Valid for Submission
Code Navigator:

Code Classification

  • Injury, poisoning and certain other consequences of external causes
    (S00–T88)
    • Toxic effects of substances chiefly nonmedicinal as to source
      (T51-T65)
      • Toxic effect of other and unspecified substances
        (T65)

T65 is a non-specific and non-billable diagnosis code code, consider using a code with a higher level of specificity for a diagnosis of toxic effect of other and unspecified substances. 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.

Unspecified diagnosis codes like T65 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.

Specific Coding Applicable to Toxic effect of other and unspecified substances

Non-specific codes like T65 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 toxic effect of other and unspecified substances:

  • T65.0 for Toxic effect of cyanides - NON-BILLABLE CODE

  • T65.0X for Toxic effect of cyanides - NON-BILLABLE CODE

  • T65.1 for Toxic effect of strychnine and its salts - NON-BILLABLE CODE

  • T65.1X for Toxic effect of strychnine and its salts - NON-BILLABLE CODE

  • T65.2 for Toxic effect of tobacco and nicotine - NON-BILLABLE CODE

  • T65.21 for Toxic effect of chewing tobacco - NON-BILLABLE CODE

  • T65.22 for Toxic effect of tobacco cigarettes - NON-BILLABLE CODE

  • T65.29 for Toxic effect of other tobacco and nicotine - NON-BILLABLE CODE

  • T65.3 for Toxic effect of nitroderivatives and aminoderivatives of benzene and its homologues - NON-BILLABLE CODE

  • T65.3X for Toxic effect of nitroderivatives and aminoderivatives of benzene and its homologues - NON-BILLABLE CODE

  • T65.4 for Toxic effect of carbon disulfide - NON-BILLABLE CODE

  • T65.4X for Toxic effect of carbon disulfide - NON-BILLABLE CODE

  • T65.5 for Toxic effect of nitroglycerin and other nitric acids and esters - NON-BILLABLE CODE

  • T65.5X for Toxic effect of nitroglycerin and other nitric acids and esters - NON-BILLABLE CODE

  • T65.6 for Toxic effect of paints and dyes, not elsewhere classified - NON-BILLABLE CODE

  • T65.6X for Toxic effect of paints and dyes, not elsewhere classified - NON-BILLABLE CODE

  • T65.8 for Toxic effect of other specified substances - NON-BILLABLE CODE

  • T65.81 for Toxic effect of latex - NON-BILLABLE CODE

  • T65.82 for Toxic effect of harmful algae and algae toxins - NON-BILLABLE CODE

  • T65.83 for Toxic effect of fiberglass - NON-BILLABLE CODE

  • T65.89 for Toxic effect of other specified substances - NON-BILLABLE CODE

  • T65.9 for Toxic effect of unspecified substance - NON-BILLABLE CODE

  • T65.91 for Toxic effect of unspecified substance, accidental (unintentional) - NON-BILLABLE CODE

  • T65.92 for Toxic effect of unspecified substance, intentional self-harm - NON-BILLABLE CODE

  • T65.93 for Toxic effect of unspecified substance, assault - NON-BILLABLE CODE

  • T65.94 for Toxic effect of unspecified substance, undetermined - NON-BILLABLE CODE

Coding Guidelines

The appropriate 7th character is to be added to each code from block Toxic effect of other and unspecified substances (T65). Use the following options for the aplicable episode of care:

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

Tabular List of Diseases and Injuries

The following annotation back-references are applicable to this diagnosis code. The Tabular List of Diseases and Injuries is a list of ICD-10-CM codes, organized "head to toe" into chapters and sections with coding notes and guidance for inclusions, exclusions, descriptions and more.


7th Character Note

7th Character Note
Certain ICD-10-CM categories have applicable 7th characters. The applicable 7th character is required for all codes within the category, or as the notes in the Tabular List instruct. The 7th character must always be the 7th character in the data field. If a code that requires a 7th character is not 6 characters, a placeholder X must be used to fill in the empty characters.
  • The appropriate 7th character is to be added to each code from category T65

7th Character

7th Character
Indicates that a seventh character is to be assigned to codes in a subcategory.
  • A - initial encounter
  • D - subsequent encounter
  • S - sequela

Patient Education


Poisoning

A poison is any substance that is harmful to your body. You might swallow it, inhale it, inject it, or absorb it through your skin. Any substance can be poisonous if too much is taken. Poisons can include:

  • Prescription or over-the-counter medicines taken in doses that are too high
  • Overdoses of illegal drugs
  • Carbon monoxide from gas appliances
  • Household products, such as laundry powder or furniture polish
  • Pesticides
  • Indoor or outdoor plants
  • Metals such as lead and mercury

The effects of poisoning range from short-term illness to brain damage, coma, and death. To prevent poisoning it is important to use and store products exactly as their labels say. Keep dangerous products where children can't get to them. Treatment for poisoning depends on the type of poison. If you suspect someone has been poisoned, call your local poison control center at 1-800-222-1222 right away.


[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.