How Is Parkinson’s Disease Psychosis Diagnosed?

There is no single test for Parkinson's disease psychosis, so doctors rely on reports from patients and families.

There is no blood test or biomarker for this challenging disease, says Andrew S. Feigin, M.D., director of the Fresco Institute for Parkinson’s & Movement Disorders at NYU Langone Health. Instead, doctors rely on reports from patients and their family members to determine whether someone has Parkinson's disease psychosis.