F19.98 ICD-10-CA code: Mental and behavioural disorders due to use of other specified psychoactive substances, unspecified mental and behavioural disorder
F19.98 is the ICD-10-CA code for “Mental and behavioural disorders due to use of other specified psychoactive substances, unspecified mental and behavioural disorder” in CIHI’s FY 2026–2027 release, in effect from Apr 1, 2026.
Official description
F19.98Mental and behavioural disorders due to use of other specified psychoactive substances, unspecified mental and behavioural disorder
Short description: Ment/beh dis oth psyact ment/beh NOS
ICD-10-CA · Canada · Also written F1998
Index terms
Entries in CIHI’s alphabetical index that lead to F19.98. Searching the index by the condition the note names is how coders reach this code.
- Disorder (of), phencyclidine use
- Disorder (of), mental (or behavioral) (nonpsychotic), due to (secondary to), psychoactive substance use, specified NEC
Notes for F19.98
As CIHI prints them, with any note F19.98 takes from the headings above it.
Includes
- Misuse of drugs NOSFrom F19 Mental and behavioural disorders due to multiple drug use and use of other psychoactive substances
- 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
- This category should be used when two or more psychoactive substances are known to be involved, but it is impossible to assess which substance is contributing most to the disorders. It should also be used when the exact identity of some or even all the psychoactive substances being used is uncertain or unknown, since many multiple drug users themselves often do not know the details of what they are taking.From F19 Mental and behavioural disorders due to multiple drug use and use of other psychoactive substances
- 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 F19.98 sits
- 1ChapterChapter 5: Mental and behavioural disorders (F00-F99)
- 2Block F10-F19Mental and behavioural disorders due to psychoactive substance use
- 3Category F19Mental and behavioural disorders due to multiple drug use and use of other psychoactive substances
- 4Subcategory F19.9Mental and behavioural disorders due to multiple drug use and use of other psychoactive substances, unspecified mental and behavioural disorder
- 5Valid code F19.98Mental and behavioural disorders due to use of other specified psychoactive substances, unspecified mental and behavioural disorder
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 F19.98 mean?
F19.98 is the ICD-10-CA code for “Mental and behavioural disorders due to use of other specified psychoactive substances, unspecified mental and behavioural disorder” in CIHI’s ICD-10-CA FY 2026–2027 release.
Where is F19.98 in ICD-10-CA?
F19.98 sits under F19.9 Mental and behavioural disorders due to multiple drug use and use of other psychoactive substances, unspecified mental and behavioural disorder, within F19 Mental and behavioural disorders due to multiple drug use and use of other psychoactive substances, 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 F19.98?
ICD-10-CA lists Note, Includes, Excludes notes for F19.98, 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.