Which of the following is NOT a type of schizophrenia spectrum disorder?

Bipolar Disorder is indeed a mood disorder and is classified separately from schizophrenia spectrum disorders. The schizophrenia spectrum includes disorders characterized by psychotic symptoms such as hallucinations and delusions, as well as other features such as disorganized thinking and negative symptoms.

Schizotypal Personality Disorder, Delusional Disorder, and Schizoaffective Disorder all fall under the umbrella of the schizophrenia spectrum in the DSM-5. Schizotypal Personality Disorder is characterized by interpersonal deficits and cognitive or perceptual distortions, whereas Delusional Disorder centers on the presence of one or more delusions that persist for at least one month. Schizoaffective Disorder combines symptoms of schizophrenia with mood disorder symptoms, illustrating its place within the schizophrenia spectrum.

Bipolar Disorder, with its manic and depressive episodes, does not share the central psychotic features characteristic of schizophrenia spectrum disorders, making it distinct from those conditions. Therefore, identifying Bipolar Disorder as not being part of the schizophrenia spectrum is accurate.