U.S. ICD-10-CM · FY 2027

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

A clear reference for the official code description, hierarchy, and related coding information from the FY 2027 U.S. release.

Code definition

Official description

T65

Toxic effect of other and unspecified substances

ICD-10-CM diagnosis code · United States clinical modification

Classification

Where T65 sits

  1. 1

    Chapter 19

    Injury, poisoning and certain other consequences of external causes (S00-T88)

  2. 2

    Section

    Toxic effects of substances chiefly nonmedicinal as to source (T51-T65)

  3. 3

    Category T65

    Toxic effect of other and unspecified substances

  4. 4

    Code T65

    Toxic effect of other and unspecified substances

More specific choices

Codes under T65

T65 is a non-billable category. Choose the child code that best matches the documented diagnosis.

T65.0

Toxic effect of cyanides

T65.1

Toxic effect of strychnine and its salts

T65.2

Toxic effect of tobacco and nicotine

T65.3

Toxic effect of nitroderivatives and aminoderivatives of benzene and its homologues

T65.4

Toxic effect of carbon disulfide

T65.5

Toxic effect of nitroglycerin and other nitric acids and esters

T65.6

Toxic effect of paints and dyes, not elsewhere classified

T65.8

Toxic effect of other specified substances

T65.9

Toxic effect of unspecified substance

Documentation details

Notes for this code

Inclusion terms

No inclusion terms are listed for T65.

Code first

No “code first” instruction is listed for T65.

Use additional code

No “use additional code” instruction is listed for T65.

Excludes1

Conditions that should not be reported together with this code.

No Excludes1 note is listed for T65.

Excludes2

Conditions not included here that may be reported separately when present.

No Excludes2 note is listed for T65.

Transparency

Source and release

Data release

U.S. ICD-10-CM · FY 2027

Effective date

Oct 1, 2026

Publisher

Vero Scribe Inc.

This reference is generated from Vero’s ICD-10-CM description, hierarchy, and code-note dataset. The visible content and structured data share that source.

Review the CDC/NCHS ICD-10-CM source

Code-specific guidance

Frequently asked questions

What does ICD-10-CM code T65 mean?

T65 is the FY 2027 U.S. ICD-10-CM code for “Toxic effect of other and unspecified substances.”

Is T65 a billable or specific ICD-10-CM code?

No. T65 has more specific child codes in the FY 2027 reference data. Select the code that matches the documentation and confirm the active code set and payer requirements.

Where is T65 located in ICD-10-CM?

T65 is listed in Chapter 19, Injury, poisoning and certain other consequences of external causes (S00-T88), within Toxic effects of substances chiefly nonmedicinal as to source (T51-T65) (T51–T65), under category T65, Toxic effect of other and unspecified substances.

What coding notes are listed for T65?

No inclusion terms are listed for T65 in this reference record. No code-first instruction is listed. No Excludes1 note is listed. No Excludes2 note is listed.

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