T40
Non-billableNarcotics and psychodysleptics
Poisoning by, adverse effect of and underdosing of narcotics and psychodysleptics [hallucinogens]
This is a header/category code. For billing purposes, use a more specific child code from the list below.
Coding Notes
Includes
Conditions included under this code
- adverse effect of correct substance properly administered
- poisoning by overdose of substance
- poisoning by wrong substance given or taken in error
- underdosing by (inadvertently) (deliberately) taking less substance than prescribed or instructed
Excludes 1
Codes that cannot be used together with this code (mutual exclusion)
Excludes 2
Conditions not included here, but the patient may have both
- •abuse and dependence of psychoactive substancesF10-F19
- •abuse of non-dependence-producing substancesF55
- •immunodeficiency due to drugsD84.821
- •drug reaction and poisoning affecting newbornP00-P96
- •pathological drug intoxication (inebriation)F10-F19
- •drug dependence and related mental and behavioral disorders due to psychoactive substance use.-)F10-F19
Code First
The underlying condition must be sequenced before this code
- , for adverse effects, the nature of the adverse effect, such as:
- •adverse effect NOST88.7
- •aspirin gastritisK29
- •blood disordersD56-D76
- •contact dermatitisL23-L25
- •dermatitis due to substances taken internallyL27
- •nephropathyN14.0-N14.2
Use Additional Code
Additional codes that should follow this code
7th Character Definitions
- A - initial encounter
- D - subsequent encounter
- S - sequela
Child Codes (10)
T40.0Poisoning by, adverse effect of and underdosing of opium
T40.1Poisoning by and adverse effect of heroin
T40.2Poisoning by, adverse effect of and underdosing of opioids
T40.3Poisoning by, adverse effect of and underdosing of methadone
T40.4Synthetic narcotics
T40.5Poisoning by, adverse effect of and underdosing of cocaine
T40.6And unsp narcotics
T40.7Cannabis (derivatives)
T40.8Poisoning by and adverse effect of lysergide [LSD]
T40.9And unsp psychodysleptics
ICD-11 Equivalents(1)
ICD-11 Equivalents
View full mappingCorresponding ICD-11 codes from the WHO crosswalk mapping
Also Known As / Clinical Terms(2)
Frequently Asked Questions
What is the ICD-10 code for narcotics and psychodysleptics?
The ICD-10-CM code for narcotics and psychodysleptics is T40. The full clinical description is "Poisoning by, adverse effect of and underdosing of narcotics and psychodysleptics [hallucinogens]". T40 is a non-billable header code. Use a more specific child code for billing purposes.
What does ICD-10 code T40 mean?
ICD-10-CM code T40 represents “Poisoning by, adverse effect of and underdosing of narcotics and psychodysleptics [hallucinogens]”. It is classified under Chapter 19: Injury, Poisoning and Certain Other Consequences of External Causes and is a non-billable header code. Use a more specific child code for billing purposes.
Is T40 a billable code?
No, T40 is a non-billable header code. You need to use one of its more specific child codes for billing. There are 10 child codes under T40.
What chapter is T40 in?
T40 is in Chapter 19: Injury, Poisoning and Certain Other Consequences of External Causes (codes S00-T88).
What codes cannot be used with T40?
T40 has Excludes1 notes indicating codes that cannot be used together with it, including: birth trauma (P10-P15); obstetric trauma (O70-O71); toxic reaction to local anesthesia in pregnancy (O29.3-).
What are the subcategories under T40?
T40 has 10 child codes, including: T40.0 (Poisoning by, adverse effect of and underdosing of opium), T40.1 (Poisoning by and adverse effect of heroin), T40.2 (Poisoning by, adverse effect of and underdosing of opioids), T40.3 (Poisoning by, adverse effect of and underdosing of methadone), and 6 more.
Are additional codes required with T40?
Yes, when using T40, also report: any retained foreign body, if applicable (Z18.-); code(s) to specify:; manifestations of poisoning; underdosing or failure in dosage during medical and surgical care (Y63.6, Y63.8-Y63.9); underdosing of medication regimen (Z91.12-, Z91.13-).
What are the UMLS CUIs for T40?
T40 is linked to 1 UMLS Concept Unique Identifier: C2877556. The UMLS (Unified Medical Language System) integrates multiple biomedical vocabularies maintained by the U.S. National Library of Medicine.
How does T40 relate to ICF functioning codes?
ICF (International Classification of Functioning, Disability and Health) codes describe how conditions like narcotics and psychodysleptics affect a person's functioning — body functions, activities, participation, and environmental factors. AutoICD provides ICF Core Sets for 12+ conditions and can map clinical text to ICF categories automatically. Browse the ICF directory to explore functioning codes.
What is the ICD-11 equivalent of T40?
T40 maps to the ICD-11 code: NE60 (Harmful effects of drugs, medicaments or biological substances, not elsewhere classified).
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Includes SNOMED Clinical Terms® (SNOMED CT®) used by permission of SNOMED International. Includes content from the UMLS Metathesaurus, courtesy of the U.S. National Library of Medicine.