ICD-10-CM > F01-F99 > F20-F29 > F29 F29 Unspecified psychosis not due to a substance or known physiological condition Billable/Specific Copy Code Copy Description Applicable To Psychosis NOSUnspecified schizophrenia spectrum and other psychotic disorder Type 1 Excludes mental disorder NOS (F99)unspecified mental disorder due to known physiological condition (F09)