How Is Parkinson’s Diagnosed? Tests, Symptoms, and What to Expect

When tremors, stiffness, or balance issues appear, one of the first questions people ask is: Could this be Parkinson’s disease? Unlike many conditions, there isn’t a single blood test or scan that can confirm Parkinson’s. Instead, diagnosis relies on a careful medical evaluation.

👉 Hook: Because Parkinson’s can look like other movement disorders, such as essential tremor or atypical Parkinsonism, getting an accurate diagnosis from a specialist is critical. Keep reading to learn how doctors determine if it’s Parkinson’s—and what steps come next.

Clinical Evaluation by a Neurologist
Parkinson’s disease is usually diagnosed by a neurologist, ideally one who specializes in movement disorders. The doctor begins by reviewing:

• Medical history (including family background and symptoms timeline)
• Medication review (since some drugs can cause parkinsonism-like symptoms)
• Physical and neurological exams to assess tremor, muscle stiffness, reflexes, and walking patterns

Key Symptoms That Lead to Diagnosis
Doctors look for the core motor symptoms of Parkinson’s:

• Tremors, usually at rest
• Slowness of movement (bradykinesia)
• Muscle rigidity
• Balance and posture changes

If at least two of these hallmark symptoms are present, especially if they start on one side of the body, Parkinson’s is suspected.

Rule-Out Approach
Because no single lab test confirms Parkinson’s, doctors often use a rule-out process:

• Imaging tests such as MRI or CT scans may be used to exclude other conditions.
• A DaTscan can show reduced dopamine activity in the brain, supporting a PD diagnosis.
• Blood work may be ordered to rule out thyroid issues or other causes of tremor.

Response to Medication
Another diagnostic tool is a trial of Parkinson’s medication, such as levodopa. If symptoms improve significantly, this strongly suggests Parkinson’s disease.

Why Early Diagnosis Matters
Early detection allows people to begin symptom management strategies—like medications, exercise programs, and support groups—so they can maintain independence and quality of life for as long as possible.

Why Support Matters
A diagnosis of any form of Parkinson’s can feel overwhelming. But with the right support and resources, individuals can maintain independence, quality of life, and emotional well-being.
For resources, referrals, and support in navigating Parkinson’s and related conditions, contact the Parkinson’s Association of Southwest Florida at www.paswfl.org or call 239-417-3465.

For over 25 years, PASWFL has provided free, high-quality services and programs to individuals and families touched by Parkinson’s disease in Southwest Florida. Their goal is simple: help people live well with PD, regardless of where they are in their journey.

​Each week, PASWFL offers more than 25 free programs and support groups, including:

• Wellness and fitness classes
• Speech Exercise classes
• Educational seminars
• Support for care partners
• Support groups

There are no fees to become a member, and PASWFL welcomes anyone touched by PD.
Take the First Step Toward Living Well
If you suspect early Parkinson’s or have been recently diagnosed, you don’t have to face it alone.
👉 Click here to sign up for the PASWFL newsletter
👉 Click here to become a member (it's free!)
To learn more, visit www.paswfl.org and discover the power of support, education, and community.