F16.3 ICD-10-CA code: Mental and behavioural disorders due to use of hallucinogens, withdrawal state
F16.3 is the ICD-10-CA code for “Mental and behavioural disorders due to use of hallucinogens, withdrawal state” in CIHI’s FY 2026–2027 release, in effect from Apr 1, 2026.
Official description
F16.3Mental and behavioural disorders due to use of hallucinogens, withdrawal state
Short description: Ment/beh disrd dt use hallucin withdr st
ICD-10-CA · Canada · Also written F163
Notes for F16.3
As CIHI prints them, with any note F16.3 takes from the headings above it.
Includes
- Disorders of psychological developmentFrom Chapter 5: Mental and behavioural disorders (F00-F99)
Excludes
Conditions classified elsewhere.
- Abuse of non-dependence-producing substances (F55)From F10-F19 Mental and behavioural disorders due to psychoactive substance use
- Symptoms, signs and abnormal clinical laboratory findings, not elsewhere classified (R00-R99)From Chapter 5: Mental and behavioural disorders (F00-F99)
Note
- A group of symptoms of variable clustering and severity occurring on absolute or relative withdrawal of a psychoactive substance after persistent use of that substance. The onset and course of the withdrawal state are time-limited and are related to the type of psychoactive substance and dose being used immediately before cessation or reduction of use. The withdrawal state may be complicated by convulsions.
- This block contains a wide variety of disorders that differ in severity and clinical form but that are all attributable to the use of one or more psychoactive substances, which may or may not have been medically prescribed. The third character of the code identifies the substance involved, and the fourth character specifies the clinical state. The codes should be used, as required, for each substance specified, but it should be noted that not all fourth-character codes are applicable to all substances.Identification of the psychoactive substance should be based on as many sources of information as possible. These include self-report data, analysis of blood and other body fluids, characteristic physical and psychological symptoms, clinical signs and behaviour, and other evidence such as a drug being in the patient's possession or reports from informed third parties. Many drug users take more than one type of psychoactive substance. The main diagnosis should be classified, whenever possible, according to the substance or class of substances that has caused or contributed most to the presenting clinical syndrome. Other diagnoses should be coded when other psychoactive substances have been taken in intoxicating amounts (common fourth character .0) or to the extent of causing harm (common fourth character .1), dependence (common fourth character .2) or other disorders (common fourth character .3-.9).Only in cases in which patterns of psychoactive substance-taking are chaotic and indiscriminate, or in which the contributions of different psychoactive substances are inextricably mixed, should the diagnosis of disorders resulting from multiple drug use (F19.-) be used.From F10-F19 Mental and behavioural disorders due to psychoactive substance use
Where F16.3 sits
- 1ChapterChapter 5: Mental and behavioural disorders (F00-F99)
- 2Block F10-F19Mental and behavioural disorders due to psychoactive substance use
- 3Category F16Mental and behavioural disorders due to use of hallucinogens
- 4Valid code F16.3Mental and behavioural disorders due to use of hallucinogens, withdrawal state
Source and release
- Data release
- ICD-10-CA · FY 2026–2027
- Effective date
- Apr 1, 2026
- Publisher
- CIHI
This page is built from the ICD-10-CA catalog that Vero Codes reads when it suggests codes: Canadian Institute for Health Information’s FY 2026–2027 release, imported from the publisher’s file and checked against it. The description, notes and structured data come from the same record.
Frequently asked questions
What does ICD-10-CA code F16.3 mean?
F16.3 is the ICD-10-CA code for “Mental and behavioural disorders due to use of hallucinogens, withdrawal state” in CIHI’s ICD-10-CA FY 2026–2027 release.
Where is F16.3 in ICD-10-CA?
F16.3 sits under F16 Mental and behavioural disorders due to use of hallucinogens, within F10-F19 Mental and behavioural disorders due to psychoactive substance use, within Chapter 5: Mental and behavioural disorders (F00-F99).
What coding notes apply to F16.3?
ICD-10-CA lists Note, Excludes, Includes notes for F16.3, including those from the headings it sits under. They are listed on this page with where each one comes from.
Which ICD-10-CA release does this page use?
It uses CIHI’s FY 2026–2027 release, in effect from Apr 1, 2026 to Mar 31, 2027. It is a reference: confirm the code against the current list and the payer’s rules before you submit it.
Codes beside F16.3
View F16F16.0Mental and behavioural disorders due to use of hallucinogens, acute intoxicationF16.1Mental and behavioural disorders due to use of hallucinogens, harmful useF16.2Mental and behavioural disorders due to use of hallucinogens, dependence syndromeF16.4Mental and behavioural disorders due to use of hallucinogens, withdrawal state with deliriumF16.5Mental and behavioural disorders due to use of hallucinogens, psychotic disorderF16.6Mental and behavioural disorders due to use of hallucinogens, amnesic syndromeF16.7Mental and behavioural disorders due to use of hallucinogens, residual and late-onset psychotic disorderF16.8Mental and behavioural disorders due to use of hallucinogens, other mental and behavioural disordersF16.9Mental and behavioural disorders due to use of hallucinogens, unspecified mental and behavioural disorder