How is Parkinson’s disease diagnosed?

There is no specific diagnostic procedure or laboratory test to establish a Parkinson's disease (PD) diagnosis. Doctors diagnose the disease based on the symptoms and physical and neurological exams. Your doctor will look for classic signs of PD, especially the typical pill-rolling tremor, slowness of movement, rigidity, and abnormal gait. Symptom improvement after taking PD medication helps confirm the diagnosis.