Overview of this block 
 
F20     Schizophrenia

	F20.0   Paranoid schizophrenia 
	F20.1   Hebephrenic schizophrenia 
	F20.2   Catatonic schizophrenia 
	F20.3   Undifferentiated schizophrenia 
	F20.4   Post - schizophrenic depression 
	F20.5   Residual schizophrenia 
	F20.6   Simple schizophrenia 
	F20.8   Other schizophrenia 
	F20.9   Schizophrenia, unspecified 
 
	A fifth character may be used to classify course:
	
	F20.x0     Continuous 
	F20.x1     Episodic with progressive deficit 
	F20.x2     Episodic with stable deficit 
	F20.x3     Episodic remittent 
	F20.x4     Incomplete remission 
	F20.x5     Complete remission 
	F20.x8     Other 
	F20.x9     Course uncertain, period of observation too short 
 
F21     Schizotypal disorder

F22     Persistent delusional disorders

	F22.0   Delusional disorder 
	F22.8   Other persistent delusional disorders 
	F22.9   Persistent delusional disorder, unspecified 
 
F23     Acute and transient psychotic disorders

	F23.0   Acute polymorphic psychotic disorder without symptoms of schizophrenia 
	F23.1   Acute polymorphic psychotic disorder with symptoms of schizophrenia 
	F23.2   Acute schizophrenia - like psychotic disorder 
	F23.3   Other acute predominantly delusional psychotic disorder 
	F23.8   Other acute and transient psychotic disorders 
	F23.9   Acute and transient psychotic disorder, unspecified 
 
	A fifth character may be used to identify the presence or absence of
	associated acute stress:
	
	F23.x0    Without associated acute stress 
	F23.x1    With associated acute stress 
 
F24     Induced delusional disorder

F25     Schizoaffective disorders

	F25.0   Schizoaffective disorder, manic type 
	F25.1   Schizoaffective disorder, depressive type 
	F25.2   Schizoaffective disorder, mixed type 
	F25.8   Other schizoaffective disorders 
	F25.9   Schizoaffective disorder, unspecified 
 
F28     Other nonorganic psychotic disorders

F29     Unspecified nonorganic psychosis