T40
ICD-10Non-billable categoryNarcotics and psychodysleptics
Official ICD-10-CM descriptor (FY2026)
Poisoning by, adverse effect of and underdosing of narcotics and psychodysleptics [hallucinogens]
T40 is a category heading, not a billable code. CMS does not accept it on a claim; report one of the more specific codes beneath it.
Excludes2
Not included here. The condition is not part of this code, but a patient may have both, and both codes may be reported together.
- drug dependence and related mental and behavioral disorders due to psychoactive substance use (F10.-F19.-)
7th character
- The appropriate 7th character is to be added to each code from category T40
Permitted 7th characters
| A | initial encounter |
| D | subsequent encounter |
| S | sequela |
More specific codes under T40
- T40.0Poisoning by, adverse effect of and underdosing of opiumcategory
- T40.1Poisoning by and adverse effect of heroincategory
- T40.2Poisoning by, adverse effect of and underdosing of opioidscategory
- T40.3Poisoning by, adverse effect of and underdosing of methadonecategory
- T40.4Synthetic narcoticscategory
- T40.5Poisoning by, adverse effect of and underdosing of cocainecategory
- T40.6And unsp narcoticscategory
- T40.7Cannabis (derivatives)category
- T40.8Poisoning by and adverse effect of lysergide [LSD]category
- T40.9And unsp psychodyslepticscategory
Where this code sits
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ICD-10-CM FY2026. Centers for Medicare & Medicaid Services (CMS) / National Center for Health Statistics (NCHS), “2026 ICD-10-CM Code Descriptions in Tabular Order” (icd10cm_order_2026.txt). Download the original file from cms.gov. Public domain (US Government work). Descriptors, billable flags and instructional notes on this page are reproduced from that file without modification. Krasyn adds no clinical guidance.