F23.1 ICD-10-CA code: Acute polymorphic psychotic disorder with symptoms of schizophrenia
F23.1 is the ICD-10-CA code for “Acute polymorphic psychotic disorder with symptoms of schizophrenia” in CIHI’s FY 2026–2027 release, in effect from Apr 1, 2026.
Official description
F23.1Acute polymorphic psychotic disorder with symptoms of schizophrenia
Short description: Ac polymorphic psych disrd w sym schiz
ICD-10-CA · Canada · Also written F231
Index terms
Entries in CIHI’s alphabetical index that lead to F23.1. Searching the index by the condition the note names is how coders reach this code.
- Psychosis, psychotic, schizophreniform, confusional type
- Bouffée délirante (without symptoms of schizophrenia), with symptoms of schizophrenia
- Psychosis, psychotic, cycloid (without symptoms of schizophrenia), with symptoms of schizophrenia
- Disorder (of), psychotic (due to), polymorphic, acute (without symptoms of schizophrenia), with symptoms of schizophrenia
Notes for F23.1
As CIHI prints them, with any note F23.1 takes from the headings above it.
Includes
- Bouffée délirante without symptoms of schizophrenia or unspecifiedCycloid psychosis without symptoms of schizophrenia or unspecified
- Disorders of psychological developmentFrom Chapter 5: Mental and behavioural disorders (F00-F99)
Excludes
Conditions classified elsewhere.
- Symptoms, signs and abnormal clinical laboratory findings, not elsewhere classified (R00-R99)From Chapter 5: Mental and behavioural disorders (F00-F99)
Note
- An acute psychotic disorder in which the polymorphic and unstable clinical picture is present, as described in F23.0; despite this instability, however, some symptoms typical of schizophrenia are also in evidence for the majority of the time. If the schizophrenic symptoms persist the diagnosis should be changed to schizophrenia (F20.-).
- A heterogeneous group of disorders characterized by the acute onset of psychotic symptoms such as delusions, hallucinations, and perceptual disturbances, and by the severe disruption of ordinary behaviour. Acute onset is defined as a crescendo development of a clearly abnormal clinical picture in about two weeks or less. For these disorders there is no evidence of organic causation. Perplexity and puzzlement are often present but disorientation for time, place and person is not persistent or severe enough to justify a diagnosis of organically caused delirium (F05.-). Complete recovery usually occurs within a few months, often within a few weeks or even days. If the disorder persists, a change in classification will be necessary. The disorder may or may not be associated with acute stress, defined as usually stressful events preceding the onset by one to two weeks.From F23 Acute and transient psychotic disorders
- This block brings together schizophrenia, as the most important member of the group, schizotypal disorder, persistent delusional disorders, and a larger group of acute and transient psychotic disorders. Schizoaffective disorders have been retained here in spite of their controversial nature.From F20-F29 Schizophrenia, schizotypal and delusional disorders
Where F23.1 sits
- 1ChapterChapter 5: Mental and behavioural disorders (F00-F99)
- 2Block F20-F29Schizophrenia, schizotypal and delusional disorders
- 3Category F23Acute and transient psychotic disorders
- 4Valid code F23.1Acute polymorphic psychotic disorder with symptoms of schizophrenia
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 F23.1 mean?
F23.1 is the ICD-10-CA code for “Acute polymorphic psychotic disorder with symptoms of schizophrenia” in CIHI’s ICD-10-CA FY 2026–2027 release.
Where is F23.1 in ICD-10-CA?
F23.1 sits under F23 Acute and transient psychotic disorders, within F20-F29 Schizophrenia, schizotypal and delusional disorders, within Chapter 5: Mental and behavioural disorders (F00-F99).
What coding notes apply to F23.1?
ICD-10-CA lists Note, Includes, Excludes notes for F23.1, 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.