T40
⚠ Non-billable
Poisoning by, adverse effect of and underdosing of narcotics and psychodysleptics [hallucinogens]
ICD-10-CM · FY2026 · Injury, Poisoning and Certain Other Consequences of External Causes
Code
T40
System
ICD-10-CM
Billable
No — use specific code
Effective
FY2026
Chapter
Injury, Poisoning and Certain Other Consequences of External Causes
Source
CMS / CDC NCHS
⚠ Verify before billing. Confirm against the current CMS/NCHS ICD-10-CM files and your payer's rules before claims submission.
Frequently asked questions
What is ICD-10 code T40?
ICD-10-CM code T40 represents Poisoning by, adverse effect of and underdosing of narcotics and psychodysleptics [hallucinogens]. It is a non-billable header code requiring a more specific subcategory in the Injury, Poisoning and Certain Other Consequences of External Causes chapter, effective October 1, 2025 – September 30, 2026.
Is T40 billable?
No. T40 is a non-billable header. Select a more specific subcategory for claims submission.
What chapter is T40 in?
T40 belongs to the Injury, Poisoning and Certain Other Consequences of External Causes chapter (S00–T88) of ICD-10-CM.
Related codes in the T40 category
T40.0
Poisoning by, adverse effect of and underdosing of opium
Non-billable
T40.1
Poisoning by and adverse effect of heroin
Non-billable
T40.2
Poisoning by, adverse effect of and underdosing of other opioids
Non-billable
T40.3
Poisoning by, adverse effect of and underdosing of methadone
Non-billable
T40.4
Poisoning by, adverse effect of and underdosing of other synthetic narcotics
Non-billable
T40.5
Poisoning by, adverse effect of and underdosing of cocaine
Non-billable
T40.6
Poisoning by, adverse effect of and underdosing of other and unspecified narcotics
Non-billable
T40.7
Poisoning by, adverse effect of and underdosing of cannabis (derivatives)
Non-billable
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