How Is Parkinson's Disease Diagnosed?

When symptoms like tremors, stiffness, or slowed movement arise, many people wonder: How is Parkinson’s disease diagnosed? Unlike some medical conditions that can be confirmed with a single blood test or scan, diagnosing Parkinson’s disease (PD) involves a combination of clinical evaluations, medical history, and observation.

​The process can be both challenging and detailed, as early symptoms may be subtle or overlap with other neurological conditions

How Is Parkinson's Disease Diagnosed?
Parkinson’s disease is primarily diagnosed through a clinical neurological examination. This means there’s no definitive lab test or imaging scan that can confirm the condition—at least not in the early stages. Here’s how the process usually unfolds:
1. Reviewing Medical History
A neurologist will begin by asking about your medical history, including any symptoms you’ve been experiencing, when they began, and how they have progressed. They may also ask about exposure to environmental toxins or family history, as genetic factors can sometimes play a role.
2. Conducting a Neurological Exam
During the exam, the neurologist checks for hallmark PD signs such as:

• Resting tremors (especially in hands)
• Bradykinesia (slowness of movement)
• Muscle rigidity
• Postural instability
• Changes in speech or facial expressions

The presence of two or more of these symptoms, particularly on one side of the body, is a strong indicator.
3. Observing Response to Parkinson’s Medication
Sometimes, a neurologist will prescribe a trial of Parkinson’s medication, such as carbidopa-levodopa. A significant improvement in symptoms after taking the medication is often used as further confirmation of the diagnosis.
4. Imaging Tests (When Needed)
Though not required for diagnosis, imaging such as MRI or DaTscan may be ordered to rule out other neurological conditions or confirm dopamine transporter activity in the brain. However, these tools are more supportive than diagnostic.
5. Consultation With a Movement Disorder Specialist
In complex or uncertain cases, seeing a specialist in movement disorders can provide more clarity. These professionals have extensive experience in differentiating Parkinson’s from other similar conditions.

​Early and accurate diagnosis is key to starting treatments and support systems that help manage symptoms and maintain quality of life.

The Parkinson’s Association of Southwest Florida: A Lifeline of Support
For over 25 years, the Parkinson’s Association of Southwest Florida (PASWFL) has been a trusted source of education, empowerment, and connection for individuals and families affected by Parkinson’s and related neurological diseases.
Every week, PASWFL offers more than 25 free programs and support groups, available at no cost to members. These programs are designed to improve quality of life for those living with PD and their care partners.
Membership is completely free, and applying is easy via their website at www.parkinsonassociationswfl.org.

• Click here to sign up for their newsletter
• Click here to join PASWFL as a free member

If you or a loved one are navigating Parkinson’s, know that you are not alone—and help is just a click away