Protocol Service
Diagnostics
Galleri Multi-Cancer Blood Test in Scarsdale, NY
Protocol Health offers the Galleri multi-cancer early detection test in Scarsdale, NY. Galleri is a physician-ordered blood test that looks for DNA methylation patterns shed by more than 50 cancer types and, when it finds a signal, predicts where in the body it likely started.
Medically reviewed by Richard Dentico, MD, Medical Director
★ 5.0 on Google · 107 reviews (as of October 2026) · Physician-led, family-owned
Our Scarsdale clinic serves Westchester County (longevity clinic in Westchester). Telehealth in NY, NJ, CT, FL and CA.
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Grail Galleri Cancer Screening Test at Protocol Health
Before you book
How Galleri works, and what it does not do
Galleri reads patterns in cell-free DNA in the blood. It is designed to complement standard, guideline-recommended screening such as colonoscopy and mammography, not replace it. Like every screening test it can miss a cancer (a false negative) and can signal one that follow-up does not confirm, which is why results are reviewed with a physician.
Who considers Galleri?
Adults adding to, not replacing, standard screening.
- Adults with a family history of cancer
- Adults keeping up with guideline screening who want an extra layer
- Patients in a longevity program
Galleri's limits
Read these before testing.
False negatives. A cancer can be present without a signal.
False positives. A signal can lead to follow-up that finds nothing.
Not a replacement. Keep up with colonoscopy, mammography and other recommended screening.
What the test involves
A blood draw. At the Scarsdale clinic.
Physician-ordered. Ordered and reviewed by your provider.
Signal of origin. A positive result predicts where the signal likely started.
Follow-up plan. Next steps if a signal is found.
How Galleri testing runs
Booked through the short intake.
- Consultation. Whether Galleri fits.
- Blood draw. At the clinic.
- Results. Reviewed with your provider.
- Follow-up. If a signal is found.
Common questions
Grail Galleri Cancer Screening Test: frequently asked questions
What does Galleri test for?
DNA methylation patterns shed by more than 50 cancer types.
Does Galleri replace other screening?
No. It complements guideline-recommended screening.
Can Galleri miss cancer?
Yes. Like all screening tests, it can return a false negative.
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