2022 ICD-10-CM Code T65.93

Toxic effect of unspecified substance, assault

Version 2021

Not Valid for Submission

Short Description:Toxic effect of unspecified substance, assault
Long Description:Toxic effect of unspecified substance, assault

Code Classification

  • Injury, poisoning and certain other consequences of external causes (S00–T98)
    • Toxic effects of substances chiefly nonmedicinal as to source (T51-T65)
      • Toxic effect of other and unspecified substances (T65)

T65.93 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 unspecified substance, assault. The code is not specific and is NOT valid for the year 2022 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 T65.93 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.

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:

Specific Coding for Toxic effect of unspecified substance, assault

Non-specific codes like T65.93 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 toxic effect of unspecified substance, assault:

  • BILLABLE CODE - Use T65.93XA for initial encounter
  • BILLABLE CODE - Use T65.93XD for subsequent encounter
  • BILLABLE CODE - Use T65.93XS for sequela

Table of Drugs and Chemicals

The code T65.93 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
Aerosol spray NECT65.91T65.92T65.93T65.94
Agricultural agent NECT65.91T65.92T65.93T65.94
Air contaminant (s), source/type NOST65.91T65.92T65.93T65.94
  »ethylene glycol
Chemical substance NECT65.91T65.92T65.93T65.94
Horticulture agent NECT65.91T65.92T65.93T65.94
Horticulture agent NEC
  »with pesticide
Ingested substance NECT65.91T65.92T65.93T65.94
Poison NECT65.91T65.92T65.93T65.94
Solid substanceT65.91T65.92T65.93T65.94
Solid substance
  »specified NEC
Spray (aerosol)T65.91T65.92T65.93T65.94
Spray (aerosol)
Spray (aerosol)
  »medicinal NEC
Spray (aerosol)
Spray (aerosol)
  »specified content

Information for Patients


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

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 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)