2025 ICD-10-CM code T40.8

Poisoning by and adverse effect of lysergide [LSD].

Use a secondary code from Chapter 20 (External causes of morbidity) to indicate the cause of the poisoning or adverse effect if known (e.g., accidental ingestion, intentional overdose). If the cause is undetermined, code T40.8X4A is used.

Yes, the 7th character of this ICD-10-CM code is used to specify the encounter (e.g., initial encounter, subsequent encounter, sequela). Refer to official ICD-10-CM guidelines for detailed instructions on the appropriate use of 7th character extensions.

Medical necessity is established by the presence of signs, symptoms, or laboratory findings consistent with LSD poisoning or adverse effect.

The clinician is responsible for documenting the details of LSD exposure, including route, amount (if known), and time of exposure. Any symptoms, signs, or laboratory findings related to the poisoning or adverse effect should be recorded. The clinician is also responsible for managing any acute or chronic health consequences.

In simple words: This code indicates a harmful reaction or poisoning due to LSD.

This code represents poisoning by, or an adverse effect of, lysergic acid diethylamide (LSD).

Example 1: A 22-year-old patient presents to the emergency department with visual hallucinations, anxiety, and tachycardia after ingesting a blotter paper believed to contain LSD. The patient’s symptoms are managed supportively, and they recover without incident. Code: T40.8X1A (Poisoning by lysergide [LSD], accidental (unintentional), initial encounter), A 19-year-old patient is admitted to the hospital after experiencing persistent perceptual disturbances and flashbacks several weeks after using LSD. Code: T40.8X5A (Adverse effect of lysergide [LSD], initial encounter), A patient with a history of schizophrenia presents with worsening psychosis after unknowingly ingesting a substance misrepresented as a different drug but actually containing LSD. Code: T40.8X4A (Poisoning by lysergide [LSD], undetermined, initial encounter); F20.9 (Schizophrenia, unspecified)

Documentation should clearly specify the type of exposure (poisoning or adverse effect), the circumstances surrounding the exposure (e.g., accidental, intentional), and the clinical manifestations of the condition. Any treatment provided and the patient’s response to treatment should also be documented.

** Excludes2: drug dependence and related mental and behavioral disorders due to psychoactive substance use (F10-F19)

  • Payment Status: Active
  • Specialties:Emergency Medicine, Medical Toxicology, Psychiatry, Internal Medicine
  • Place of Service:Emergency Room - Hospital, Inpatient Hospital, Office
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