F29 vs R44
F29 and R44 can never be reported together. ICD-10-CM declares them mutually exclusive with an Excludes1 note, meaning the two conditions cannot occur in the same patient — so exactly one of them is correct for any given encounter.
Unspecified psychosis not due to a substance or known physiological condition
- Chapter 5
- Mental, Behavioral and Neurodevelopmental disorders
- Section
- F20-F29
- Psychosis NOS
- Unspecified schizophrenia spectrum and other psychotic disorder
- Psychosis, psychotic
- Disorder › schizophrenia spectrum and other psychotic disorder (of)
- Psychosis, psychotic › confusional
- Psychosis, psychotic › nonorganic
- Schizophrenia, schizophrenic › spectrum and other psychotic disorder
Other symptoms and signs involving general sensations and perceptions
- Chapter 18
- Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified
- Section
- R40-R46
These two codes sit in different chapters of the Tabular List, which is usually the clearest signal that they describe different underlying processes rather than different degrees of the same one.
Excludes1 is not always absolute: where two conditions covered by the note are genuinely unrelated, CMS guidance permits reporting both. Document the reasoning rather than assuming it. More on Excludes1 vs Excludes2 · FY2027