T40.6 — Poisoning by, adverse effect of and underdosing of other and unspecified narcotics
Is T40.6 billable?
No — T40.6 is a non-billable header code. T40.6 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 36 billable codes beneath T40.6.
Billable codes under this header
- T40.601APoisoning by unspecified narcotics, accidental (unintentional), initial encounter
- T40.601DPoisoning by unspecified narcotics, accidental (unintentional), subsequent encounter
- T40.601SPoisoning by unspecified narcotics, accidental (unintentional), sequela
- T40.602APoisoning by unspecified narcotics, intentional self-harm, initial encounter
- T40.602DPoisoning by unspecified narcotics, intentional self-harm, subsequent encounter
- T40.602SPoisoning by unspecified narcotics, intentional self-harm, sequela
- T40.603APoisoning by unspecified narcotics, assault, initial encounter
- T40.603DPoisoning by unspecified narcotics, assault, subsequent encounter
- T40.603SPoisoning by unspecified narcotics, assault, sequela
- T40.604APoisoning by unspecified narcotics, undetermined, initial encounter
- T40.604DPoisoning by unspecified narcotics, undetermined, subsequent encounter
- T40.604SPoisoning by unspecified narcotics, undetermined, sequela
- T40.605AAdverse effect of unspecified narcotics, initial encounter
- T40.605DAdverse effect of unspecified narcotics, subsequent encounter
- T40.605SAdverse effect of unspecified narcotics, sequela
- T40.606AUnderdosing of unspecified narcotics, initial encounter
- T40.606DUnderdosing of unspecified narcotics, subsequent encounter
- T40.606SUnderdosing of unspecified narcotics, sequela
- T40.691APoisoning by other narcotics, accidental (unintentional), initial encounter
- T40.691DPoisoning by other narcotics, accidental (unintentional), subsequent encounter
- T40.691SPoisoning by other narcotics, accidental (unintentional), sequela
- T40.692APoisoning by other narcotics, intentional self-harm, initial encounter
- T40.692DPoisoning by other narcotics, intentional self-harm, subsequent encounter
- T40.692SPoisoning by other narcotics, intentional self-harm, sequela
- T40.693APoisoning by other narcotics, assault, initial encounter
- T40.693DPoisoning by other narcotics, assault, subsequent encounter
- T40.693SPoisoning by other narcotics, assault, sequela
- T40.694APoisoning by other narcotics, undetermined, initial encounter
- T40.694DPoisoning by other narcotics, undetermined, subsequent encounter
- T40.694SPoisoning by other narcotics, undetermined, sequela
- T40.695AAdverse effect of other narcotics, initial encounter
- T40.695DAdverse effect of other narcotics, subsequent encounter
- T40.695SAdverse effect of other narcotics, sequela
- T40.696AUnderdosing of other narcotics, initial encounter
- T40.696DUnderdosing of other narcotics, subsequent encounter
- T40.696SUnderdosing of other narcotics, sequela
T40.6 at a glance
| Code | T40.6 |
|---|---|
| Description | Poisoning by, adverse effect of and underdosing of other and unspecified 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 T40.6 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 T40.6. T40.6 describes a manifestation and cannot be the principal or first-listed diagnosis.
Use additional code — inherited from Chapter 19
Report an additional code alongside T40.6 to fully describe the condition. T40.6 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 T40.6 to fully describe the condition. T40.6 is sequenced first.
Excludes2 — not included here — inherited from Chapter 19
The conditions below are not part of T40.6, but a patient may have both at the same time. When documentation supports it, T40.6 and the excluded code may both be reported.
Excludes2 — not included here — inherited from T36-T50
The conditions below are not part of T40.6, but a patient may have both at the same time. When documentation supports it, T40.6 and the excluded code may both be reported.
Excludes2 — not included here — inherited from T40
The conditions below are not part of T40.6, but a patient may have both at the same time. When documentation supports it, T40.6 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 T40.6? (2)
How long has T40.6 existed?
T40.6 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
- T40.4Poisoning by, adverse effect of and underdosing of other synthetic narcoticsnot billable
- T40.5Poisoning by, adverse effect of and underdosing of cocainenot 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