Schizophrenia, schizotypal and delusional disorders

F20     Schizophrenia
F20.0   Paranoid schizophrenia

F20.1   Hebephrenic schizophrenia 
F20.2   Catatonic schizophrenia 
F20.3   Undifferentiated schizophrenia 
F20.4   Post­schizophrenic 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 schizophrenia­like 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