F42 ICD-10-CA category: Obsessive-compulsive disorder
F42 isn’t a code on its own. Choose one of the 5 codes beneath it, the one the documentation supports.
Official description
F42Obsessive-compulsive disorder
ICD-10-CA · Canada
Codes in F42
F42 isn’t a code on its own. Open the code that matches what the note documents.
Notes for F42
As CIHI prints them, with any note F42 takes from the headings above it.
Includes
- Anankastic neurosisobsessive-compulsive neurosis
- Disorders of psychological developmentFrom Chapter 5: Mental and behavioural disorders (F00-F99)
Excludes
Conditions classified elsewhere.
- Obsessive-compulsive:• behaviour (R46.80)• personality (disorder) (F60.5)
- When associated with conduct disorder in F91.- (F92.8)From F40-F48 Neurotic, stress-related and somatoform disorders
- Symptoms, signs and abnormal clinical laboratory findings, not elsewhere classified (R00-R99)From Chapter 5: Mental and behavioural disorders (F00-F99)
Note
- The essential feature is recurrent obsessional thoughts or compulsive acts. Obsessional thoughts are ideas, images, or impulses that enter the patient's mind again and again in a stereotyped form. They are almost invariably distressing and the patient often tries, unsuccessfully, to resist them. They are, however, recognized as his or her own thoughts, even though they are involuntary and often repugnant. Compulsive acts or rituals are stereotyped behaviours that are repeated again and again. They are not inherently enjoyable, nor do they result in the completion of inherently useful tasks. Their function is to prevent some objectively unlikely event, often involving harm to or caused by the patient, which he or she fears might otherwise occur. Usually, this behaviour is recognized by the patient as pointless or ineffectual and repeated attempts are made to resist. Anxiety is almost invariably present. If compulsive acts are resisted the anxiety gets worse.
Where F42 sits
- 1ChapterChapter 5: Mental and behavioural disorders (F00-F99)
- 2Block F40-F48Neurotic, stress-related and somatoform disorders
- 3Category F42Obsessive-compulsive 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
Is F42 a valid ICD-10-CA code?
No. F42 (Obsessive-compulsive disorder) is a category heading in CIHI’s ICD-10-CA FY 2026–2027 release. It holds 5 codes; record the one the documentation supports.
Where is F42 in ICD-10-CA?
F42 sits under F40-F48 Neurotic, stress-related and somatoform disorders, within Chapter 5: Mental and behavioural disorders (F00-F99).
What coding notes apply to F42?
ICD-10-CA lists Note, Includes, Excludes notes for F42, 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.