T65 — Toxic effect of other and unspecified substances
Not billable
Is T65 billable?
No — T65 is a non-billable header code. T65 groups more specific codes and cannot be submitted on a claim. A valid ICD-10-CM code must be reported at the highest level of specificity available in its branch. Select one of the 60 billable codes beneath T65.
Billable codes under this header
- T65.91XAToxic effect of unspecified substance, accidental (unintentional), initial encounter
- T65.91XDToxic effect of unspecified substance, accidental (unintentional), subsequent encounter
- T65.91XSToxic effect of unspecified substance, accidental (unintentional), sequela
- T65.92XAToxic effect of unspecified substance, intentional self-harm, initial encounter
- T65.92XDToxic effect of unspecified substance, intentional self-harm, subsequent encounter
- T65.92XSToxic effect of unspecified substance, intentional self-harm, sequela
- T65.93XAToxic effect of unspecified substance, assault, initial encounter
- T65.93XDToxic effect of unspecified substance, assault, subsequent encounter
- T65.93XSToxic effect of unspecified substance, assault, sequela
- T65.94XAToxic effect of unspecified substance, undetermined, initial encounter
- T65.94XDToxic effect of unspecified substance, undetermined, subsequent encounter
- T65.94XSToxic effect of unspecified substance, undetermined, sequela
- T65.0X1AToxic effect of cyanides, accidental (unintentional), initial encounter
- T65.0X1DToxic effect of cyanides, accidental (unintentional), subsequent encounter
- T65.0X1SToxic effect of cyanides, accidental (unintentional), sequela
- T65.0X2AToxic effect of cyanides, intentional self-harm, initial encounter
- T65.0X2DToxic effect of cyanides, intentional self-harm, subsequent encounter
- T65.0X2SToxic effect of cyanides, intentional self-harm, sequela
- T65.0X3AToxic effect of cyanides, assault, initial encounter
- T65.0X3DToxic effect of cyanides, assault, subsequent encounter
- T65.0X3SToxic effect of cyanides, assault, sequela
- T65.0X4AToxic effect of cyanides, undetermined, initial encounter
- T65.0X4DToxic effect of cyanides, undetermined, subsequent encounter
- T65.0X4SToxic effect of cyanides, undetermined, sequela
- T65.1X1AToxic effect of strychnine and its salts, accidental (unintentional), initial encounter
- T65.1X1DToxic effect of strychnine and its salts, accidental (unintentional), subsequent encounter
- T65.1X1SToxic effect of strychnine and its salts, accidental (unintentional), sequela
- T65.1X2AToxic effect of strychnine and its salts, intentional self-harm, initial encounter
- T65.1X2DToxic effect of strychnine and its salts, intentional self-harm, subsequent encounter
- T65.1X2SToxic effect of strychnine and its salts, intentional self-harm, sequela
- T65.1X3AToxic effect of strychnine and its salts, assault, initial encounter
- T65.1X3DToxic effect of strychnine and its salts, assault, subsequent encounter
- T65.1X3SToxic effect of strychnine and its salts, assault, sequela
- T65.1X4AToxic effect of strychnine and its salts, undetermined, initial encounter
- T65.1X4DToxic effect of strychnine and its salts, undetermined, subsequent encounter
- T65.1X4SToxic effect of strychnine and its salts, undetermined, sequela
- T65.211AToxic effect of chewing tobacco, accidental (unintentional), initial encounter
- T65.211DToxic effect of chewing tobacco, accidental (unintentional), subsequent encounter
- T65.211SToxic effect of chewing tobacco, accidental (unintentional), sequela
- T65.212AToxic effect of chewing tobacco, intentional self-harm, initial encounter
- T65.212DToxic effect of chewing tobacco, intentional self-harm, subsequent encounter
- T65.212SToxic effect of chewing tobacco, intentional self-harm, sequela
- T65.213AToxic effect of chewing tobacco, assault, initial encounter
- T65.213DToxic effect of chewing tobacco, assault, subsequent encounter
- T65.213SToxic effect of chewing tobacco, assault, sequela
- T65.214AToxic effect of chewing tobacco, undetermined, initial encounter
- T65.214DToxic effect of chewing tobacco, undetermined, subsequent encounter
- T65.214SToxic effect of chewing tobacco, undetermined, sequela
- T65.221AToxic effect of tobacco cigarettes, accidental (unintentional), initial encounter
- T65.221DToxic effect of tobacco cigarettes, accidental (unintentional), subsequent encounter
- T65.221SToxic effect of tobacco cigarettes, accidental (unintentional), sequela
- T65.222AToxic effect of tobacco cigarettes, intentional self-harm, initial encounter
- T65.222DToxic effect of tobacco cigarettes, intentional self-harm, subsequent encounter
- T65.222SToxic effect of tobacco cigarettes, intentional self-harm, sequela
- T65.223AToxic effect of tobacco cigarettes, assault, initial encounter
- T65.223DToxic effect of tobacco cigarettes, assault, subsequent encounter
- T65.223SToxic effect of tobacco cigarettes, assault, sequela
- T65.224AToxic effect of tobacco cigarettes, undetermined, initial encounter
- T65.224DToxic effect of tobacco cigarettes, undetermined, subsequent encounter
- T65.224SToxic effect of tobacco cigarettes, undetermined, sequela
T65 at a glance
| Code | T65 |
|---|---|
| Description | Toxic effect of other and unspecified substances |
| Billable | No — header code |
| Code set | ICD-10-CM FY2027 |
| Valid for encounters | October 1, 2026 – September 30, 2027 |
Excludes1 — never code together — inherited from T51-T65
The conditions below can never be reported together with T65 on the same claim. An Excludes1 note means the two conditions cannot occur in the same patient, so reporting both is a coding error.
- contact with and (suspected) exposure to toxic substances (Z77.-)
Use additional code — inherited from Chapter 19
Report an additional code alongside T65 to fully describe the condition. T65 is sequenced first.
- code to identify any retained foreign body, if applicable (Z18.-)
Use additional code — inherited from T51-T65
Report an additional code alongside T65 to fully describe the condition. T65 is sequenced first.
Excludes2 — not included here — inherited from Chapter 19
The conditions below are not part of T65, but a patient may have both at the same time. When documentation supports it, T65 and the excluded code may both be reported.
What codes fall under T65? (9)
- T65.0Toxic effect of cyanidesnot billable
- T65.1Toxic effect of strychnine and its saltsnot billable
- T65.2Toxic effect of tobacco and nicotinenot billable
- T65.3Toxic effect of nitroderivatives and aminoderivatives of benzene and its homologuesnot billable
- T65.4Toxic effect of carbon disulfidenot billable
- T65.5Toxic effect of nitroglycerin and other nitric acids and estersnot billable
- T65.6Toxic effect of paints and dyes, not elsewhere classifiednot billable
- T65.8Toxic effect of other specified substancesnot billable
- T65.9Toxic effect of unspecified substancenot billable
How long has T65 existed?
T65 has been in ICD-10-CM since at least FY2016, the earliest fiscal year on record here.
Derived from the official order files for FY2016–FY2026. FY2017 and FY2020 publish no order file, so those years are not covered.