T40.4 — Poisoning by, adverse effect of and underdosing of other synthetic narcotics
Is T40.4 billable?
No — T40.4 is a non-billable header code. T40.4 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 54 billable codes beneath T40.4.
Billable codes under this header
- T40.411APoisoning by fentanyl or fentanyl analogs, accidental (unintentional), initial encounter
- T40.411DPoisoning by fentanyl or fentanyl analogs, accidental (unintentional), subsequent encounter
- T40.411SPoisoning by fentanyl or fentanyl analogs, accidental (unintentional), sequela
- T40.412APoisoning by fentanyl or fentanyl analogs, intentional self-harm, initial encounter
- T40.412DPoisoning by fentanyl or fentanyl analogs, intentional self-harm, subsequent encounter
- T40.412SPoisoning by fentanyl or fentanyl analogs, intentional self-harm, sequela
- T40.413APoisoning by fentanyl or fentanyl analogs, assault, initial encounter
- T40.413DPoisoning by fentanyl or fentanyl analogs, assault, subsequent encounter
- T40.413SPoisoning by fentanyl or fentanyl analogs, assault, sequela
- T40.414APoisoning by fentanyl or fentanyl analogs, undetermined, initial encounter
- T40.414DPoisoning by fentanyl or fentanyl analogs, undetermined, subsequent encounter
- T40.414SPoisoning by fentanyl or fentanyl analogs, undetermined, sequela
- T40.415AAdverse effect of fentanyl or fentanyl analogs, initial encounter
- T40.415DAdverse effect of fentanyl or fentanyl analogs, subsequent encounter
- T40.415SAdverse effect of fentanyl or fentanyl analogs, sequela
- T40.416AUnderdosing of fentanyl or fentanyl analogs, initial encounter
- T40.416DUnderdosing of fentanyl or fentanyl analogs, subsequent encounter
- T40.416SUnderdosing of fentanyl or fentanyl analogs, sequela
- T40.421APoisoning by tramadol, accidental (unintentional), initial encounter
- T40.421DPoisoning by tramadol, accidental (unintentional), subsequent encounter
- T40.421SPoisoning by tramadol, accidental (unintentional), sequela
- T40.422APoisoning by tramadol, intentional self-harm, initial encounter
- T40.422DPoisoning by tramadol, intentional self-harm, subsequent encounter
- T40.422SPoisoning by tramadol, intentional self-harm, sequela
- T40.423APoisoning by tramadol, assault, initial encounter
- T40.423DPoisoning by tramadol, assault, subsequent encounter
- T40.423SPoisoning by tramadol, assault, sequela
- T40.424APoisoning by tramadol, undetermined, initial encounter
- T40.424DPoisoning by tramadol, undetermined, subsequent encounter
- T40.424SPoisoning by tramadol, undetermined, sequela
- T40.425AAdverse effect of tramadol, initial encounter
- T40.425DAdverse effect of tramadol, subsequent encounter
- T40.425SAdverse effect of tramadol, sequela
- T40.426AUnderdosing of tramadol, initial encounter
- T40.426DUnderdosing of tramadol, subsequent encounter
- T40.426SUnderdosing of tramadol, sequela
- T40.491APoisoning by other synthetic narcotics, accidental (unintentional), initial encounter
- T40.491DPoisoning by other synthetic narcotics, accidental (unintentional), subsequent encounter
- T40.491SPoisoning by other synthetic narcotics, accidental (unintentional), sequela
- T40.492APoisoning by other synthetic narcotics, intentional self-harm, initial encounter
- T40.492DPoisoning by other synthetic narcotics, intentional self-harm, subsequent encounter
- T40.492SPoisoning by other synthetic narcotics, intentional self-harm, sequela
- T40.493APoisoning by other synthetic narcotics, assault, initial encounter
- T40.493DPoisoning by other synthetic narcotics, assault, subsequent encounter
- T40.493SPoisoning by other synthetic narcotics, assault, sequela
- T40.494APoisoning by other synthetic narcotics, undetermined, initial encounter
- T40.494DPoisoning by other synthetic narcotics, undetermined, subsequent encounter
- T40.494SPoisoning by other synthetic narcotics, undetermined, sequela
- T40.495AAdverse effect of other synthetic narcotics, initial encounter
- T40.495DAdverse effect of other synthetic narcotics, subsequent encounter
- T40.495SAdverse effect of other synthetic narcotics, sequela
- T40.496AUnderdosing of other synthetic narcotics, initial encounter
- T40.496DUnderdosing of other synthetic narcotics, subsequent encounter
- T40.496SUnderdosing of other synthetic narcotics, sequela
T40.4 at a glance
| Code | T40.4 |
|---|---|
| Description | Poisoning by, adverse effect of and underdosing of other synthetic narcotics |
| 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 T36-T50
The conditions below can never be reported together with T40.4 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 T40.4. T40.4 describes a manifestation and cannot be the principal or first-listed diagnosis.
Use additional code — inherited from Chapter 19
Report an additional code alongside T40.4 to fully describe the condition. T40.4 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 T40.4 to fully describe the condition. T40.4 is sequenced first.
Excludes2 — not included here — inherited from Chapter 19
The conditions below are not part of T40.4, but a patient may have both at the same time. When documentation supports it, T40.4 and the excluded code may both be reported.
Excludes2 — not included here — inherited from T36-T50
The conditions below are not part of T40.4, but a patient may have both at the same time. When documentation supports it, T40.4 and the excluded code may both be reported.
Excludes2 — not included here — inherited from T40
The conditions below are not part of T40.4, but a patient may have both at the same time. When documentation supports it, T40.4 and the excluded code may both be reported.
- drug dependence and related mental and behavioral disorders due to psychoactive substance use (F10.-F19.-)
What codes fall under T40.4? (3)
How long has T40.4 existed?
T40.4 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.
What other codes are in the T40 family? (9)
- 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
- T40.5Poisoning 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