Neurologists rarely perform genetic testing for Parkinson's disease. Evidence suggests that many patients with major genetic variants go undiagnosed

This review addresses the past and current states of genetic testing for Parkinson's disease based on the available data. In short, neurologists rarely perform genetic testing for Parkinson's disease, and evidence suggests that many patients with major genetic variants go undiagnosed. For patients, caregivers, and families, we looked into the various clinical and personal applications of genetic information. Consumer interest and demand for genetic testing in general, and for Parkinson's disease in particular, is increasing. Furthermore, researchers now have a better understanding of the genetic phenotypes of Parkinson's disease; there is more access to free or low-cost genetic testing and counseling; and patients with specific PD genetic variants can now participate in interventional clinical trials. All of these developments highlight the importance of expanding genetic testing for Parkinson's disease. By addressing perceived barriers and providing practical information and resources, we hope to increase clinician comfort and confidence, allowing them to offer more PD genetic testing in their practices. We can provide tailored information specific to the patient by entering the realm of personalized medicine, which, as other specialties have done, may result in improvements in clinical practice, care, and outcomes. Expanding PD genetic testing, on the other hand, will necessitate the collaboration of a group of medical experts and key stakeholders, particularly genetic counselors, who are already experts at guiding patients through complex genetic information and, more importantly, in the context of their psychological states.