Acute and Transient Psychotic Disorder (ICD-11: 6A23) - Complete Coding Guide

1. Introduction

Acute and transient psychotic disorder represents a unique psychiatric condition characterized by its sudden onset, intense symptomatology, and relatively rapid resolution. Unlike other primary psychotic disorders, this condition arises abruptly, without prior warning signs, and tends to resolve completely within weeks or months, often without leaving significant sequelae.

The clinical importance of this diagnosis lies in the need to properly differentiate it from more chronic conditions such as schizophrenia, which require long-term therapeutic approaches. An accurate diagnosis allows for appropriate interventions, avoids unnecessary stigmatization, and offers a more favorable prognosis to patients and families.

Although precise epidemiological data vary among different populations, this disorder is relatively uncommon when compared to other psychotic disorders. It tends to affect young adults, with some studies suggesting a slight predominance in women. Acute psychosocial stressor factors frequently precede symptom onset, although they are not necessary for diagnosis.

From a public health perspective, proper recognition of this condition is fundamental to avoid unnecessary prolonged hospitalizations and extensive pharmacological treatments. Correct coding using ICD-11 ensures precise epidemiological statistics, adequate planning of hospital resources, and facilitation of research on prognostic and therapeutic factors. Furthermore, appropriate documentation protects both the healthcare professional and the health institution in medico-legal aspects, ensuring that the treatment provided is aligned with international best clinical practices.

2. Correct ICD-11 Code

Code: 6A23

Description: Acute and transient psychotic disorder

Parent category: Schizophrenia or other primary psychotic disorders

Official definition: Acute and transient psychotic disorder is characterized by acute onset of psychotic symptoms that emerge without a prodrome and reach maximum severity within two weeks. Symptoms may include delusions, hallucinations, disorganization of thought processes, perplexity or confusion, and disturbances of affect and mood. Psychomotor disturbances of the catatonia type may be present. Symptoms typically change rapidly, both in nature and intensity, from one day to the next or even within a single day. The duration of the episode does not exceed three months and, most commonly, lasts from a few days to one month. Symptoms are not a manifestation of another medical condition (for example, a brain tumor) and are not due to the effect of a substance or medication on the central nervous system (for example, corticosteroids), including withdrawal (for example, alcohol withdrawal).

This coding represents an important evolution in the classification of psychotic disorders, recognizing the existence of psychotic episodes that, although intense, possess temporal and evolutionary characteristics distinct from chronic psychotic disorders. Code 6A23 allows precise documentation of cases that historically were classified inconsistently, improving communication among mental health professionals and facilitating international comparative studies on this specific condition.

3. When to Use This Code

Code 6A23 should be applied in specific clinical situations that meet the established diagnostic criteria. Below, we present detailed practical scenarios:

Scenario 1: Postpartum psychosis with sudden onset A 28-year-old woman with no previous psychiatric history presents to the emergency department five days after delivery with severe psychotic symptoms that began abruptly 48 hours ago. She developed persecutory delusions believing that nurses want to kidnap her baby, presents with auditory hallucinations and disorganized behavior. Symptoms emerged without prior warning signs and fluctuate in intensity throughout the day. Laboratory tests and neuroimaging excluded organic causes. This is a classic example for use of code 6A23.

Scenario 2: Psychotic episode following acute stressor A 22-year-old university student, previously healthy, develops acute psychotic symptoms three days after receiving news of the sudden death of both parents in an accident. He presents with intense perplexity, disorganized thinking, ideas of reference, and visual hallucinations. Symptoms reached maximum intensity within one week and show significant daily variation. There is no evidence of substance use or general medical conditions. Code 6A23 is appropriate in this context.

Scenario 3: Polymorphic psychotic episode A 35-year-old woman presents with a psychotic condition of abrupt onset characterized by rapidly changing symptoms: persecutory delusions on the first day, followed by grandiose ideas on the second, auditory hallucinations on the third, and periods of intense emotional lability alternating with perplexity. Symptoms emerged without identifiable prodrome and reached peak severity within ten days. This polymorphic and rapidly changing pattern is characteristic of 6A23.

Scenario 4: Acute psychosis with catatonic features A 30-year-old man suddenly develops psychotic symptoms accompanied by catatonic stupor, mutism, and rigid posture. The condition began abruptly following a viral febrile episode and reached maximum severity within five days. Comprehensive investigation excluded encephalitis, autoimmune conditions, and intoxications. The presence of catatonic features does not preclude the use of code 6A23, provided that the other criteria are present.

Scenario 5: Brief psychotic episode with complete remission A 26-year-old patient presents with an acute psychotic episode with delusions, hallucinations, and behavioral disorganization that emerges abruptly and reaches maximum intensity within one week. Following appropriate treatment, there is complete remission of symptoms within three weeks, without residual symptoms. The self-limited nature and complete recovery are consistent with code 6A23.

Scenario 6: Acute psychosis with marked daily fluctuation A 40-year-old patient develops psychotic symptoms that vary dramatically in intensity and nature within the same day: periods of lucidity alternating with intense confusion, delusions that change content rapidly, and mood that oscillates between euphoria and profound sadness. This rapid variability, when accompanied by acute onset without prodrome, justifies the use of code 6A23.

4. When NOT to Use This Code

Appropriate differentiation is crucial to avoid incorrect coding. Code 6A23 should not be used in the following situations:

Psychosis secondary to substances: When psychotic symptoms are clearly attributable to use, intoxication, or withdrawal from psychoactive substances (alcohol, cannabis, stimulants, hallucinogens), other specific codes for substance-induced psychotic disorders should be used, even if the presentation is of acute onset.

Psychosis due to general medical condition: Psychotic symptoms caused by brain tumors, encephalitis, metabolic disorders, endocrinopathies, autoimmune diseases of the central nervous system, or other identifiable medical conditions require coding of the underlying condition, not 6A23.

Psychotic episode with identifiable prodrome: If there is evidence of prodromal symptoms (progressive social isolation, gradual functional deterioration, emerging negative symptoms) in the weeks or months preceding, the diagnosis likely fits better within schizophrenia or schizophreniform disorder.

Duration exceeding three months: When psychotic symptoms persist for more than three months, code 6A23 is no longer appropriate. Depending on clinical characteristics, schizophrenia (6A20) or schizoaffective disorder (6A21) should be considered.

Exclusively affective symptoms with psychotic features: If psychotic symptoms occur exclusively during episodes of mania or severe depression, the appropriate codes are those related to mood disorders with psychotic features, not 6A23.

Previous history of multiple psychotic episodes: Patients with a history of recurrent psychotic episodes may have schizoaffective disorder or schizophrenia, even if the current episode is acute. Longitudinal assessment is essential.

Delirium: Although it may present with acute-onset psychotic symptoms, delirium has distinctive characteristics such as fluctuation in level of consciousness, prominent attentional deficit, and identifiable medical cause, requiring specific coding.

5. Step-by-Step Coding Process

Step 1: Assess diagnostic criteria

Diagnostic confirmation requires systematic and comprehensive evaluation. Begin with detailed history taking establishing precise timeline: when symptoms started, how rapidly they progressed, and whether there were previous warning signs. Interview family members or caregivers to obtain collateral information about premorbid functioning and symptom course.

Perform complete mental status examination documenting presence and characteristics of delusions, hallucinations, thought disorganization, affective changes, and psychomotor behavior. Specifically assess symptom variability, questioning about changes from day to day or even within the same day.

Structured instruments such as the Brief Psychiatric Rating Scale (BPRS) or the Positive and Negative Syndrome Scale (PANSS) may assist in quantifying symptom severity, although they are not mandatory for diagnosis. Basic cognitive assessment helps differentiate from delirium.

Meticulously investigate possible organic causes through laboratory examinations including complete blood count, renal and hepatic function, electrolytes, thyroid function, blood glucose, and toxicology screening. Neuroimaging (computed tomography or magnetic resonance imaging of the brain) should be considered, especially in first episodes or when focal neurological signs are present.

Step 2: Verify specifiers

ICD-11 allows additional specification through subcategories of code 6A23. Verify whether the clinical presentation has characteristics that justify use of specifiers related to the presence of identifiable stressors or predominant symptom profile.

Document current symptom severity considering impact on functioning, need for supervision, and risk to self or others. Record precise episode duration from onset to current evaluation.

Identify whether there are prominent catatonic features, as these may influence therapeutic decisions. Also assess the presence and intensity of concomitant affective symptoms, although these should not be predominant to maintain the diagnosis of 6A23.

Step 3: Differentiate from other codes

Differentiation from 6A20 (Schizophrenia): Schizophrenia is characterized by minimum duration of one month of active psychotic symptoms, often preceded by prodromal phase and followed by residual symptoms. 6A23 is distinguished by abrupt onset without prodrome, limited duration (maximum three months, usually less), and tendency toward complete remission.

Differentiation from 6A21 (Schizoaffective disorder): Schizoaffective disorder requires simultaneous presence of psychotic symptoms and complete mood episode (mania or depression), with psychotic symptoms also occurring outside mood episodes. In 6A23, although affective changes may exist, these do not constitute a complete mood episode and psychotic symptoms are the dominant feature.

Differentiation from 6A22 (Schizotypal disorder): Schizotypal disorder is a persistent pattern of social and interpersonal deficits, cognitive and perceptual distortions, and eccentric behavior, without frank psychotic episodes. 6A23, in contrast, is characterized by acute and florid psychotic episode.

Step 4: Required documentation

Adequate documentation should include:

Checklist of mandatory information:

Precise date of symptom onset
Detailed description of initial presentation
Absence of prodrome (document normal premorbid functioning)
Specific psychotic symptoms present (delusions, hallucinations, disorganization)
Pattern of fluctuation and symptom variability
Examinations performed to exclude organic causes with results
Toxicology screening or detailed substance use history
Risk assessment (suicide, heteroaggression)
Presence or absence of psychosocial stressors
Response to instituted treatment
Total episode duration until resolution or until time of evaluation

Record all information clearly and objectively in the medical record, using standardized terminology that allows another professional to understand the diagnostic reasoning. Robust documentation is essential not only for continuity of care, but also for medicolegal aspects and quality audits.

6. Complete Practical Example

Clinical Case

Initial presentation: A 32-year-old female patient, a teacher, is brought to the psychiatric emergency department by family members due to severe behavioral changes that began four days ago. According to her husband, the patient was completely well until one week ago, when she witnessed a violent robbery at the school where she works. Three days after the event, she suddenly began presenting with intense insomnia, psychomotor agitation, and incoherent verbalizations.

Over the last 48 hours, she developed a delusional belief that she is being persecuted by a criminal organization, reporting hearing voices that threaten her. She presents with periods of intense perplexity alternating with agitation, and her behavior has become progressively disorganized. Her husband reports that symptoms vary significantly throughout the day: in the morning she may appear relatively oriented, but in the afternoon she becomes confused and terrified.

Assessment performed: On mental status examination, the patient appears visibly anxious, with poor eye contact and tense posture. Accelerated speech with some tangentiality. Thought content with persecutory and referential delusions. Reports auditory hallucinations with voices commenting on her actions. Labile affect, alternating between intense fear and perplexity. No catatonic symptoms. Orientation partially preserved but with fluctuations. Absent insight. Denies suicidal ideation but expresses intense fear of being killed.

Negative past psychiatric history. No use of psychoactive substances. No history of head trauma or neurological diseases. Regular menstruation, not pregnant. Laboratory tests ordered: complete blood count, renal and hepatic function, electrolytes, blood glucose, thyroid hormones, serologies, toxicology screening - all within normal limits. Cranial computed tomography without abnormalities.

Diagnostic reasoning: The presentation is characterized by acute onset of psychotic symptoms (delusions, hallucinations, disorganization) without identifiable prodrome, in a previously healthy patient. Symptoms reached maximum severity in less than one week and present marked fluctuation in intensity and nature throughout the day. Current duration is four days. Comprehensive investigation excluded organic causes and substance use. Although there is an identifiable psychosocial stressor (trauma from the robbery), this is not necessary for diagnosis but contextualizes the episode.

Coding justification: All criteria for acute and transient psychotic disorder are present: acute onset without prodrome, multiple psychotic symptoms, rapid variability, absence of organic cause or substance, duration compatible (less than three months). There is no evidence of complete mood episode that would suggest schizoaffective disorder. The absence of prodrome and temporal pattern distinguish it from schizophrenia.

Step-by-Step Coding

Criteria analysis:

✓ Acute onset (symptoms emerged in days)
✓ Absence of prodrome (normal functioning until days before)
✓ Maximum severity reached in less than two weeks (one week in this case)
✓ Presence of delusions and hallucinations
✓ Thought disorganization
✓ Perplexity present
✓ Rapid fluctuation of symptoms
✓ Current duration of four days (within the three-month limit)
✓ Organic causes excluded
✓ Substance use excluded

Code selected: 6A23 - Acute and transient psychotic disorder

Complete justification: Code 6A23 is most appropriate because the patient presents with a psychotic episode of sudden onset, without prodromal signs, with symptoms that vary rapidly in nature and intensity. Comprehensive investigation excluded organic and substance-related etiologies. The temporal pattern and clinical presentation are characteristic of this diagnostic entity.

Complementary codes: Considering the complete clinical presentation, additional codes may be appropriate to document specific aspects of the presentation, such as response to an identifiable stressor or need for hospitalization for management of the acute phase. Appropriate documentation of the traumatic context (witnessed robbery) in appropriate medical record fields, although not coded as the primary diagnosis, provides valuable information for understanding the case.

7. Related Codes and Differentiation

Within the Same Category

6A20: Schizophrenia

When to use 6A20: Use this code when there are persistent psychotic symptoms for at least one month, frequently with a prior prodromal phase characterized by social withdrawal, functional decline, and emerging negative symptoms. Schizophrenia typically presents with a chronic course with residual symptoms between acute episodes.

Main difference vs. 6A23: The fundamental distinction lies in the temporal and evolutionary pattern. While 6A23 is characterized by abrupt onset without prodrome, resolution in weeks to a few months, and tendency toward complete recovery, schizophrenia presents with more insidious onset, prolonged duration, and frequently leaves residual symptoms. The presence of prominent negative symptoms (affective blunting, alogia, avolition) favors schizophrenia.

6A21: Schizoaffective disorder

When to use 6A21: This code is appropriate when there is simultaneous presence of psychotic symptoms and a complete mood episode (mania or major depression), with psychotic symptoms also occurring during periods without mood disturbance. The disorder represents an intermediate condition between schizophrenia and mood disorders.

Main difference vs. 6A23: In schizoaffective disorder, the mood episode is prominent and meets full criteria for mania or major depression, occurring concomitantly with psychotic symptoms. In 6A23, although affective changes may exist (lability, anxiety, dysphoria), these do not constitute a complete syndromic mood episode. Additionally, 6A21 tends to have a more prolonged course.

6A22: Schizotypal disorder

When to use 6A22: Use this code for persistent and pervasive patterns of social deficits, mild cognitive and perceptual distortions, and eccentric behavior that do not reach the threshold of frank psychosis. It represents a chronic condition of personality or functioning.

Main difference vs. 6A23: Schizotypal disorder does not present with acute psychotic episodes with frank delusions or hallucinations. Perceptual experiences are attenuated (illusions, not true hallucinations) and there is a stable pattern over time, not episodic. 6A23, in contrast, is characterized by an acute and florid psychotic episode.

Differential Diagnoses

Delirium: Although both may present with acute onset of psychotic symptoms, delirium is distinguished by fluctuating alteration of level of consciousness, marked attentional deficit as a central feature, and clear evidence of underlying medical etiology (infection, metabolic disturbance, medications).

Substance-induced psychotic disorders: When there is a clear temporal relationship between psychoactive substance use and symptom onset, with resolution after substance elimination, the appropriate diagnosis is substance-induced psychotic disorder. Toxicological screening and detailed history are essential.

Manic episode with psychotic features: If psychotic symptoms occur exclusively during a manic episode with elevated, expansive, or irritable mood, increased energy, decreased need for sleep, and other manic symptoms, the primary diagnosis is bipolar disorder with psychotic features.

Post-traumatic stress disorder with dissociative symptoms: Intense flashbacks may be confused with hallucinations, but in PTSD there is reexperiencing of a specific traumatic event, not true psychotic symptoms with loss of reality testing.

8. Differences with ICD-10

Equivalent ICD-10 code: F23 - Acute and transient psychotic disorders

The transition from ICD-10 to ICD-11 brought important refinements in the conceptualization and classification of acute psychotic disorders. In ICD-10, code F23 included multiple subdivisions based on specific characteristics such as presence of associated stress (F23.0 vs F23.1), polymorphic symptom profile (F23.0) or schizophreniform (F23.2), and presence of schizophrenic symptoms (F23.1 and F23.2).

Main changes in ICD-11: ICD-11 significantly simplifies this structure, reducing the number of subdivisions and focusing on the essential elements that define the condition. The emphasis falls on the characteristic temporal pattern (acute onset, absence of prodrome, limited duration) and symptom variability, without the need to specify whether or not there is an associated stressor as a primary diagnostic criterion.

The new classification recognizes that the presence of psychosocial stressor is common but not universal, and that its presence or absence does not fundamentally alter the nature of the disorder or its management. This change reflects evidence that prognosis and treatment response are similar regardless of the identification of a precipitating stressor.

Another relevant change is the clarification of temporal criteria: ICD-11 explicitly specifies that symptoms reach maximum severity within two weeks and that total duration does not exceed three months, with resolution more commonly occurring within days to one month. This temporal precision aids in the differentiation of other psychotic disorders.

Practical impact of these changes: For mental health professionals, the simplification brings greater ease of coding and reduces diagnostic ambiguity. The elimination of multiple subdivisions decreases the probability of incorrect coding and facilitates epidemiological comparisons between different services and countries.

For researchers, the cleaner structure of ICD-11 allows better data aggregation and more robust multicenter studies on this condition. For health systems, more uniform coding improves resource planning and assessment of care quality.

Clinically, the change reinforces the focus on the characteristic evolutionary pattern of these disorders - sudden onset, brief course, tendency toward resolution - which are the most relevant elements for therapeutic and prognostic decisions, regardless of specific symptom nuances that were emphasized in ICD-10.

9. Frequently Asked Questions

How is the diagnosis of acute and transient psychotic disorder made?

The diagnosis is essentially clinical, based on a comprehensive psychiatric evaluation that establishes the presence of psychotic symptoms (delusions, hallucinations, disorganization), their characteristic temporal pattern (acute onset without prodrome, maximum severity within two weeks), and the exclusion of organic or substance-related causes. Interview with the patient and collateral informants is fundamental to establish the timeline and premorbid functioning. Complementary tests (laboratory, neuroimaging) are performed not to confirm the diagnosis, but to exclude alternative etiologies. There is no specific test or biomarker for this condition. Longitudinal assessment is important, as the diagnosis may be revised if symptoms persist beyond three months or if there is recurrence, suggesting an alternative diagnosis.

Is treatment available in public health systems?

Yes, treatment for acute and transient psychotic disorder is generally available in public health systems through psychiatry services in general hospitals, psychiatric emergency units, and community mental health centers. Treatment includes antipsychotic medications, which are part of essential medication lists in many countries, and psychosocial support. Most cases can be managed at the outpatient level or in day hospitals, although brief hospitalizations may be necessary in situations of significant risk or when family support is inadequate. The availability of specialized services varies among different regions and health systems, but the growing recognition of the importance of mental health has expanded access to appropriate care.

How long does treatment last?

The duration of treatment varies considerably among individuals, but is generally relatively brief compared to other psychotic disorders. Acute pharmacological treatment with antipsychotics typically lasts from several weeks to a few months, being gradually reduced after complete symptom resolution. Many specialists recommend maintaining medication for three to six months after remission to prevent early relapse, followed by gradual discontinuation if the patient remains asymptomatic. Psychological follow-up may continue for a longer period to address the emotional impact of the episode and develop coping strategies. Regular monitoring after medication discontinuation is important, as a minority of patients may develop recurrent episodes suggesting an alternative diagnosis. Complete recovery without the need for long-term treatment is the rule, not the exception.

Can this code be used in medical certificates?

The use of diagnostic codes in medical certificates varies according to local regulations and specific context. In many jurisdictions, medical certificates for occupational or educational purposes do not require specification of the precise diagnosis, with it being sufficient to indicate the need for leave due to health reasons. When greater specification is needed (for example, for social security benefits or health insurance), the ICD code may be included. It is important to consider issues of confidentiality and stigma: although the diagnosis is legitimate and should not be grounds for discrimination, the disclosure of a psychiatric condition may have social and occupational implications. The professional should discuss with the patient the appropriate level of detail for each situation, balancing documentation needs with privacy protection. In contexts where there is robust legal protection against discrimination based on mental health conditions, the use of the code should not represent a problem.

What is the prognosis of this condition?

The prognosis of acute and transient psychotic disorder is generally favorable, with most patients experiencing complete symptom remission without significant sequelae. Longitudinal studies indicate that approximately two-thirds of patients do not experience recurrence, recovering completely after the initial episode. Factors associated with better prognosis include very acute onset (within days), presence of an identifiable precipitating stressor, absence of family history of schizophrenia, good premorbid functioning, and rapid response to initial treatment. However, a minority of patients may develop recurrent episodes or progress to more persistent psychotic disorder, a situation that requires diagnostic reevaluation. Longitudinal follow-up is important to identify early signs of recurrence and adjust the therapeutic plan as needed. Even in cases of recurrence, many patients maintain adequate functioning between episodes.

Is there a risk of developing schizophrenia after an episode of acute and transient psychotic disorder?

Although most patients with acute and transient psychotic disorder do not develop schizophrenia, there is an increased risk compared to the general population. Follow-up studies indicate that a proportion of patients initially diagnosed with acute and transient psychotic disorder eventually receive a diagnosis of schizophrenia or schizoaffective disorder, particularly when there are multiple episodes, significant family history of psychosis, or emerging negative symptoms. This reality reinforces the importance of longitudinal follow-up even after resolution of the acute episode. Warning signs include development of prodromal symptoms, gradual functional decline, or change in the pattern of episodes. The diagnosis of acute and transient psychotic disorder should be viewed as descriptive of the current episode, not necessarily as a definitive long-term diagnosis, especially in first psychotic episodes. Periodic reevaluation allows appropriate diagnostic and therapeutic adjustment as the clinical course unfolds over time.

What are the main challenges in managing this condition?

The main challenges include, first, the need for rapid and comprehensive assessment in an emergency context to exclude treatable organic causes, which can be difficult in agitated or poorly cooperative patients. Second, management of immediate risk, as patients in acute psychotic state may present with unpredictable behavior, risk of self or heteroaggression, and impaired judgment. Third, the decision regarding the need for hospitalization versus outpatient treatment, balancing safety with patient preferences and available resources. Fourth, engagement of family and support network, which may be in crisis in the face of sudden changes in the behavior of their loved one. Fifth, determination of the appropriate duration of pharmacological treatment, avoiding both premature discontinuation with risk of relapse and unnecessary prolonged use with exposure to adverse effects. Finally, longitudinal follow-up to distinguish a truly transient episode from the initial manifestation of a more persistent disorder, which only becomes clear over time.

How to differentiate this disorder from malingering or factitious disorder?

Differentiation can be challenging, but some characteristics help. In genuine acute and transient psychotic disorder, symptoms cause real distress and significant functional impairment, without obvious secondary gains. The presentation is consistent with recognized psychopathological patterns, although it may be atypical. Collateral informants confirm sudden change in behavior. The patient does not demonstrate volitional control over symptoms and there is no evidence of intentional production. In contrast, in malingering there is clear external motivation (avoid legal responsibility, obtain financial benefits), symptoms may be exaggerated or inconsistent, and there is discrepancy between complaints and observed behavior. In factitious disorder, there is intentional production of symptoms without obvious external gain, but motivated by psychological need to assume the role of patient. Careful observation, collateral information, and longitudinal assessment are essential. However, it is important to avoid excessive skepticism that may harm genuinely ill patients, remembering that atypical presentations occur in legitimate psychotic disorders.

Conclusion:

Acute and transient psychotic disorder, coded as 6A23 in ICD-11, represents a distinct diagnostic entity characterized by sudden onset, intense and fluctuating symptomatology, and tendency toward complete resolution in a relatively brief period. Appropriate coding requires careful clinical assessment, exclusion of alternative etiologies, and attention to specific temporal criteria that distinguish this condition from other primary psychotic disorders. The generally favorable prognosis and self-limited nature make appropriate recognition of this condition essential to avoid unnecessary prolonged treatments and offer realistic perspective to patients and families. Accurate documentation using code 6A23 contributes to reliable epidemiological statistics, quality research, and appropriate planning of mental health services.

External References

This article was prepared based on reliable scientific sources:

🌍 WHO ICD-11 - Acute and transient psychotic disorder
🔬 PubMed Research on Acute and transient psychotic disorder
🌍 WHO Health Topics
📋 NICE Mental Health Guidelines
📊 Clinical Evidence: Acute and transient psychotic disorder
📋 Ministry of Health - Brazil
📊 Cochrane Systematic Reviews

References verified on 2026-02-02

Acute and Transient Psychotic Disorder

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