T40 — Poisoning by, adverse effect of and underdosing of narcotics and psychodysleptics [hallucinogens]
Is T40 billable?
No — T40 is a non-billable header code. T40 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 T40.
Billable codes under this header
- T40.0X1APoisoning by opium, accidental (unintentional), initial encounter
- T40.0X1DPoisoning by opium, accidental (unintentional), subsequent encounter
- T40.0X1SPoisoning by opium, accidental (unintentional), sequela
- T40.0X2APoisoning by opium, intentional self-harm, initial encounter
- T40.0X2DPoisoning by opium, intentional self-harm, subsequent encounter
- T40.0X2SPoisoning by opium, intentional self-harm, sequela
- T40.0X3APoisoning by opium, assault, initial encounter
- T40.0X3DPoisoning by opium, assault, subsequent encounter
- T40.0X3SPoisoning by opium, assault, sequela
- T40.0X4APoisoning by opium, undetermined, initial encounter
- T40.0X4DPoisoning by opium, undetermined, subsequent encounter
- T40.0X4SPoisoning by opium, undetermined, sequela
- T40.0X5AAdverse effect of opium, initial encounter
- T40.0X5DAdverse effect of opium, subsequent encounter
- T40.0X5SAdverse effect of opium, sequela
- T40.0X6AUnderdosing of opium, initial encounter
- T40.0X6DUnderdosing of opium, subsequent encounter
- T40.0X6SUnderdosing of opium, sequela
- T40.1X1APoisoning by heroin, accidental (unintentional), initial encounter
- T40.1X1DPoisoning by heroin, accidental (unintentional), subsequent encounter
- T40.1X1SPoisoning by heroin, accidental (unintentional), sequela
- T40.1X2APoisoning by heroin, intentional self-harm, initial encounter
- T40.1X2DPoisoning by heroin, intentional self-harm, subsequent encounter
- T40.1X2SPoisoning by heroin, intentional self-harm, sequela
- T40.1X3APoisoning by heroin, assault, initial encounter
- T40.1X3DPoisoning by heroin, assault, subsequent encounter
- T40.1X3SPoisoning by heroin, assault, sequela
- T40.1X4APoisoning by heroin, undetermined, initial encounter
- T40.1X4DPoisoning by heroin, undetermined, subsequent encounter
- T40.1X4SPoisoning by heroin, undetermined, sequela
- T40.2X1APoisoning by other opioids, accidental (unintentional), initial encounter
- T40.2X1DPoisoning by other opioids, accidental (unintentional), subsequent encounter
- T40.2X1SPoisoning by other opioids, accidental (unintentional), sequela
- T40.2X2APoisoning by other opioids, intentional self-harm, initial encounter
- T40.2X2DPoisoning by other opioids, intentional self-harm, subsequent encounter
- T40.2X2SPoisoning by other opioids, intentional self-harm, sequela
- T40.2X3APoisoning by other opioids, assault, initial encounter
- T40.2X3DPoisoning by other opioids, assault, subsequent encounter
- T40.2X3SPoisoning by other opioids, assault, sequela
- T40.2X4APoisoning by other opioids, undetermined, initial encounter
- T40.2X4DPoisoning by other opioids, undetermined, subsequent encounter
- T40.2X4SPoisoning by other opioids, undetermined, sequela
- T40.2X5AAdverse effect of other opioids, initial encounter
- T40.2X5DAdverse effect of other opioids, subsequent encounter
- T40.2X5SAdverse effect of other opioids, sequela
- T40.2X6AUnderdosing of other opioids, initial encounter
- T40.2X6DUnderdosing of other opioids, subsequent encounter
- T40.2X6SUnderdosing of other opioids, sequela
- T40.3X1APoisoning by methadone, accidental (unintentional), initial encounter
- T40.3X1DPoisoning by methadone, accidental (unintentional), subsequent encounter
- T40.3X1SPoisoning by methadone, accidental (unintentional), sequela
- T40.3X2APoisoning by methadone, intentional self-harm, initial encounter
- T40.3X2DPoisoning by methadone, intentional self-harm, subsequent encounter
- T40.3X2SPoisoning by methadone, intentional self-harm, sequela
- T40.3X3APoisoning by methadone, assault, initial encounter
- T40.3X3DPoisoning by methadone, assault, subsequent encounter
- T40.3X3SPoisoning by methadone, assault, sequela
- T40.3X4APoisoning by methadone, undetermined, initial encounter
- T40.3X4DPoisoning by methadone, undetermined, subsequent encounter
- T40.3X4SPoisoning by methadone, undetermined, sequela
T40 at a glance
| Code | T40 |
|---|---|
| Description | Poisoning by, adverse effect of and underdosing of narcotics and psychodysleptics [hallucinogens] |
| Billable | No — header code |
| Code set | ICD-10-CM FY2027 |
| Valid for encounters | October 1, 2026 – September 30, 2027 |
Excludes2 — not included here
The conditions below are not part of T40, but a patient may have both at the same time. When documentation supports it, T40 and the excluded code may both be reported.
- drug dependence and related mental and behavioral disorders due to psychoactive substance use (F10.-F19.-)
Excludes1 — never code together — inherited from T36-T50
The conditions below can never be reported together with T40 on the same claim. An Excludes1 note means the two conditions cannot occur in the same patient, so reporting both is a coding error.
- toxic reaction to local anesthesia in pregnancy (O29.3-)
Code first — inherited from T36-T50
The underlying condition below must be sequenced before T40. T40 describes a manifestation and cannot be the principal or first-listed diagnosis.
Use additional code — inherited from Chapter 19
Report an additional code alongside T40 to fully describe the condition. T40 is sequenced first.
- code to identify any retained foreign body, if applicable (Z18.-)
Use additional code — inherited from T36-T50
Report an additional code alongside T40 to fully describe the condition. T40 is sequenced first.
Excludes2 — not included here — inherited from Chapter 19
The conditions below are not part of T40, but a patient may have both at the same time. When documentation supports it, T40 and the excluded code may both be reported.
Excludes2 — not included here — inherited from T36-T50
The conditions below are not part of T40, but a patient may have both at the same time. When documentation supports it, T40 and the excluded code may both be reported.
What codes fall under T40? (10)
- T40.0Poisoning by, adverse effect of and underdosing of opiumnot billable
- T40.1Poisoning by and adverse effect of heroinnot billable
- T40.2Poisoning by, adverse effect of and underdosing of other opioidsnot billable
- T40.3Poisoning by, adverse effect of and underdosing of methadonenot billable
- T40.4Poisoning by, adverse effect of and underdosing of other synthetic narcoticsnot billable
- T40.5Poisoning by, adverse effect of and underdosing of cocainenot billable
- T40.6Poisoning by, adverse effect of and underdosing of other and unspecified narcoticsnot billable
- T40.7Poisoning by, adverse effect of and underdosing of cannabis (derivatives)not billable
- T40.8Poisoning by and adverse effect of lysergide [LSD]not billable
- T40.9Poisoning by, adverse effect of and underdosing of other and unspecified psychodysleptics [hallucinogens]not billable
How long has T40 existed?
T40 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.