Unsp psychosis not due to a substance or known physiol cond

This code signifies a psychotic disorder where the specific type of psychosis cannot be determined, and it is explicitly not caused by substance use or a known medical condition. Patients present with symptoms such as hallucinations, delusions, disorganized thinking, or severely abnormal motor behavior, but a more precise diagnosis within the psychotic spectrum is unavailable.

Use this code when documentation indicates a diagnosis of psychosis, but the provider has not specified a more definitive psychotic disorder (e.g., schizophrenia, delusional disorder, brief psychotic disorder). This is typically an interim or provisional diagnosis when further evaluation is pending, or when the clinical picture does not fully meet criteria for a more specific psychotic disorder.

• Avoid using this code if the documentation clearly points to a substance-induced psychosis or a psychosis due to a general medical condition; use the appropriate F1x.xx or F06.xx codes instead.
• Always query the provider for a more specific diagnosis if possible, as this code represents an unspecified condition.
• Remember the Excludes1 notes: never code this with F99 (mental disorder NOS) or F09 (unspecified mental disorder due to known physiological condition).