T402026
Non-billable
Poisoning by, adverse effect of and underdosing of narcotics and psychodysleptics [hallucinogens]
T40 is a non-billable ICD-10-CM category (header) code for Poisoning by, adverse effect of and underdosing of narcotics and psychodysleptics [hallucinogens]; a more specific code below it is required for claims in the FY2026 code set.
Clinical Notes
Frequently Asked Questions
Code Hierarchy
T40
Poisoning by, adverse effect of and underdosing of narcotics and psychodysleptics [hallucinogens]...opium
...adverse effect of heroin
...other opioids
...methadone
...other synthetic narcotics
...cocaine
...other and unspecified narcotics
...cannabis (derivatives)
...adverse effect of lysergide [LSD]
...other and unspecified psychodysleptics [hallucinogens]
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Related MS-DRGs
2,271,559 Medicare hospitalizations across 5 DRGs for codes in T40
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Official Guidelines
Chapter 19: Injury, Poisoning, and Other External Causes
Official coding guidelines for S00-T88