F45.1 ICD-10-CA code: Undifferentiated somatoform disorder
F45.1 is the ICD-10-CA code for “Undifferentiated somatoform disorder” in CIHI’s FY 2026–2027 release, in effect from Apr 1, 2026.
Official description
F45.1Undifferentiated somatoform disorder
ICD-10-CA · Canada · Also written F451
Index terms
Entries in CIHI’s alphabetical index that lead to F45.1. Searching the index by the condition the note names is how coders reach this code.
- Disorder (of), somatoform, undifferentiated
- Disorder (of), psychosomatic NEC, undifferentiated
Notes for F45.1
As CIHI prints them, with any note F45.1 takes from the headings above it.
Includes
- Undifferentiated psychosomatic disorder
- Disorders of psychological developmentFrom Chapter 5: Mental and behavioural disorders (F00-F99)
Excludes
Conditions classified elsewhere.
- Dissociative disorders (F44.-)hair-plucking (F98.4)lalling (F80.0)lisping (F80.8)nail-biting (F98.8)psychological or behavioural factors associated with disorders or diseases classified elsewhere (F54)sexual dysfunction, not caused by organic disorder or disease (F52.-)thumb-sucking (F98.8)tic disorders (in childhood and adolescence) (F95.-)Tourette's syndrome (F95.2)trichotillomania (F63.3)From F45 Somatoform disorders
- 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
- When somatoform complaints are multiple, varying and persistent, but the complete and typical clinical picture of somatization disorder is not fulfilled, the diagnosis of undifferentiated somatoform disorder should be considered.
- The main feature is repeated presentation of physical symptoms together with persistent requests for medical investigations, in spite of repeated negative findings and reassurances by doctors that the symptoms have no physical basis. If any physical disorders are present, they do not explain the nature and extent of the symptoms or the distress and preoccupation of the patient.From F45 Somatoform disorders
Where F45.1 sits
- 1ChapterChapter 5: Mental and behavioural disorders (F00-F99)
- 2Block F40-F48Neurotic, stress-related and somatoform disorders
- 3Category F45Somatoform disorders
- 4Valid code F45.1Undifferentiated somatoform 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 F45.1 mean?
F45.1 is the ICD-10-CA code for “Undifferentiated somatoform disorder” in CIHI’s ICD-10-CA FY 2026–2027 release.
Where is F45.1 in ICD-10-CA?
F45.1 sits under F45 Somatoform disorders, within F40-F48 Neurotic, stress-related and somatoform disorders, within Chapter 5: Mental and behavioural disorders (F00-F99).
What coding notes apply to F45.1?
ICD-10-CA lists Note, Includes, Excludes notes for F45.1, 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.