ICD-10-CM T65: Toxic effect of other and unspecified substances

ICD-10-CM Diagnosis Code (2025)

Official Description for T65

Toxic effect of other and unspecified substances

Coding Notes & Guidelines for T65

Excludes1: Not Coded Here

hydrogen cyanide (T57.3-)

Excludes2: Not Included Here

nicotine dependence (F17.-)

Use Additional Code

code for exposure to second hand tobacco smoke (Z57.31, Z77.22)

Inclusion Terms

Toxic effect of cyanides NOS

Inclusion Terms

Toxic effect of strychnine and its salts NOS

Inclusion Terms

Toxic effect of chewing tobacco NOS

Inclusion Terms

Toxic effect of tobacco smoke

Inclusion Terms

Toxic effect of tobacco cigarettes NOS

Inclusion Terms

Toxic effect of other tobacco and nicotine NOS

Inclusion Terms
  • Toxic effect of aniline [benzenamine]
  • Toxic effect of nitrobenzene
  • Toxic effect of trinitrotoluene
Inclusion Terms

Toxic effect of nitroderivatives and aminoderivatives of benzene and its homologues NOS

Inclusion Terms

Toxic effect of carbon disulfide NOS

Inclusion Terms

Toxic effect of 1,2,3-Propanetriol trinitrate

Inclusion Terms

Toxic effect of nitroglycerin and other nitric acids and esters NOS

Inclusion Terms

Toxic effect of paints and dyes NOS

Inclusion Terms

Toxic effect of latex NOS

Inclusion Terms
  • Toxic effect of (harmful) algae bloom NOS
  • Toxic effect of blue-green algae bloom
  • Toxic effect of brown tide
  • Toxic effect of cyanobacteria bloom
  • Toxic effect of Florida red tide
  • Toxic effect of pfiesteria piscicida
  • Toxic effect of red tide
Inclusion Terms

Toxic effect of harmful algae and algae toxins NOS

Inclusion Terms

Toxic effect of fiberglass NOS

Inclusion Terms

Toxic effect of other specified substances NOS

Inclusion Terms

Poisoning NOS

7th Character Guidance

The appropriate 7th character is to be added to each code from category T65

7th Character Definitions
  • A: initial encounter
  • D: subsequent encounter
  • S: sequela

Child Codes (More Specific Codes for T65):

T65.0 - Toxic effect of cyanides T65.0X - Toxic effect of cyanides T65.0X1 - Toxic effect of cyanides, accidental (unintentional) T65.0X2 - Toxic effect of cyanides, intentional self-harm T65.0X3 - Toxic effect of cyanides, assault T65.0X4 - Toxic effect of cyanides, undetermined T65.1 - Toxic effect of strychnine and its salts T65.1X - Toxic effect of strychnine and its salts T65.1X1 - Toxic effect of strychnine and its salts, accidental (unintentional) T65.1X2 - Toxic effect of strychnine and its salts, intentional self-harm T65.1X3 - Toxic effect of strychnine and its salts, assault T65.1X4 - Toxic effect of strychnine and its salts, undetermined T65.2 - Toxic effect of tobacco and nicotine T65.21 - Toxic effect of chewing tobacco T65.211 - Toxic effect of chewing tobacco, accidental (unintentional) T65.212 - Toxic effect of chewing tobacco, intentional self-harm T65.213 - Toxic effect of chewing tobacco, assault T65.214 - Toxic effect of chewing tobacco, undetermined T65.22 - Toxic effect of tobacco cigarettes T65.221 - Toxic effect of tobacco cigarettes, accidental (unintentional) T65.222 - Toxic effect of tobacco cigarettes, intentional self-harm T65.223 - Toxic effect of tobacco cigarettes, assault T65.224 - Toxic effect of tobacco cigarettes, undetermined T65.29 - Toxic effect of other tobacco and nicotine T65.291 - Toxic effect of other tobacco and nicotine, accidental (unintentional) T65.292 - Toxic effect of other tobacco and nicotine, intentional self-harm T65.293 - Toxic effect of other tobacco and nicotine, assault T65.294 - Toxic effect of other tobacco and nicotine, undetermined T65.3 - Toxic effect of nitroderivatives and aminoderivatives of benzene and its homologues T65.3X - Toxic effect of nitroderivatives and aminoderivatives of benzene and its homologues T65.3X1 - Toxic effect of nitroderivatives and aminoderivatives of benzene and its homologues, accidental (unintentional) T65.3X2 - Toxic effect of nitroderivatives and aminoderivatives of benzene and its homologues, intentional self-harm T65.3X3 - Toxic effect of nitroderivatives and aminoderivatives of benzene and its homologues, assault T65.3X4 - Toxic effect of nitroderivatives and aminoderivatives of benzene and its homologues, undetermined T65.4 - Toxic effect of carbon disulfide T65.4X - Toxic effect of carbon disulfide T65.4X1 - Toxic effect of carbon disulfide, accidental (unintentional) T65.4X2 - Toxic effect of carbon disulfide, intentional self-harm T65.4X3 - Toxic effect of carbon disulfide, assault T65.4X4 - Toxic effect of carbon disulfide, undetermined T65.5 - Toxic effect of nitroglycerin and other nitric acids and esters T65.5X - Toxic effect of nitroglycerin and other nitric acids and esters T65.5X1 - Toxic effect of nitroglycerin and other nitric acids and esters, accidental (unintentional) T65.5X2 - Toxic effect of nitroglycerin and other nitric acids and esters, intentional self-harm T65.5X3 - Toxic effect of nitroglycerin and other nitric acids and esters, assault T65.5X4 - Toxic effect of nitroglycerin and other nitric acids and esters, undetermined T65.6 - Toxic effect of paints and dyes, not elsewhere classified T65.6X - Toxic effect of paints and dyes, not elsewhere classified T65.6X1 - Toxic effect of paints and dyes, not elsewhere classified, accidental (unintentional) T65.6X2 - Toxic effect of paints and dyes, not elsewhere classified, intentional self-harm T65.6X3 - Toxic effect of paints and dyes, not elsewhere classified, assault T65.6X4 - Toxic effect of paints and dyes, not elsewhere classified, undetermined T65.8 - Toxic effect of other specified substances T65.81 - Toxic effect of latex T65.811 - Toxic effect of latex, accidental (unintentional) T65.812 - Toxic effect of latex, intentional self-harm T65.813 - Toxic effect of latex, assault T65.814 - Toxic effect of latex, undetermined T65.82 - Toxic effect of harmful algae and algae toxins T65.821 - Toxic effect of harmful algae and algae toxins, accidental (unintentional) T65.822 - Toxic effect of harmful algae and algae toxins, intentional self-harm T65.823 - Toxic effect of harmful algae and algae toxins, assault T65.824 - Toxic effect of harmful algae and algae toxins, undetermined T65.83 - Toxic effect of fiberglass T65.831 - Toxic effect of fiberglass, accidental (unintentional) T65.832 - Toxic effect of fiberglass, intentional self-harm T65.833 - Toxic effect of fiberglass, assault T65.834 - Toxic effect of fiberglass, undetermined T65.89 - Toxic effect of other specified substances T65.891 - Toxic effect of other specified substances, accidental (unintentional) T65.892 - Toxic effect of other specified substances, intentional self-harm T65.893 - Toxic effect of other specified substances, assault T65.894 - Toxic effect of other specified substances, undetermined T65.9 - Toxic effect of unspecified substance T65.91 - Toxic effect of unspecified substance, accidental (unintentional) T65.92 - Toxic effect of unspecified substance, intentional self-harm T65.93 - Toxic effect of unspecified substance, assault T65.94 - Toxic effect of unspecified substance, undetermined

About ICD-10-CM Code T65 (Toxic effect of other and unspecified substances)

ICD-10-CM code T65 is a billable or specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes. The 2025 edition of ICD-10-CM T65 became effective on October 1, 2024.

This page provides detailed information about T65 - Toxic effect of other and unspecified substances. It includes common terminology, coding guidelines such as "Includes," "Excludes1," and "Excludes2" notes, and information on required 7th characters. Utilizing this information correctly is essential for accurate medical coding and claims submission for conditions like Toxic effect of other and unspecified substances.