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About · Prefusion Health

Data, plus a team that
acts on it. 

Prefusion exists because data only changes your life if someone helps you use it. We pair medical-grade testing with real, one-on-one human care.

4.8 on Google3 NY locationsMedical-grade carePrivate-pay, no insurance
Our philosophy

In our founder's words

Therapies are a dime a dozen in New York. What sets Prefusion apart is how we leverage the data we have access to and put it into the human management of that data. The Protocol is the data. The membership is the team that helps you act on it.

That is who we are: body composition, performance, longevity, measured with real tools and managed by real people, in person.

Who you actually see

Meet the team

Every scan is read by a person, not a portal. This is who is in the room with you.

Bryan Jonas, Founder of Prefusion Health

Bryan Jonas

Founder

Bryan built Prefusion around one idea: therapies are a dime a dozen in New York, and what actually changes an outcome is the data underneath them and the people who read it with you.

He runs the practice across all three New York locations, sits in on consultations himself, and set the rule the whole clinic works to, that nobody is prescribed anything before a DEXA scan and a full blood panel are on the table.

Matanel Kaplan, Chief Operating Officer

Matanel Kaplan

Chief Operating Officer
Dominique Vargas, New York City Office Manager

Dominique Vargas

NYC Office Manager
Mark Delannoy, Health Associate

Mark Delannoy

Health Associate
Jake Kleve, Health Associate

Jake Kleve

Health Associate
In their own words

Meet the people behind the data.

Two of the team on why this place exists and what actually happens when you walk in.

Why we built PrefusionBryan Jonas · Owner
Why we built Prefusion

The same pattern, over and over.

“For years I have seen similar patterns in clients coming in. Low energy, tired, brain fog, feeling stuck.”

Bryan opened Prefusion because those people kept arriving with the same complaint and no way to see what was causing it. His answer was to stop guessing and start measuring.

A DEXA scan for body composition, an RMR test for what your metabolism actually does at rest, and around 50 biomarkers to read your metabolic health properly. Only once that data is in does anyone talk about treatment.

Then it gets targeted. Our dietitians, our strength and conditioning coaches, hormone therapy or peptide therapy, chosen for what your numbers show rather than a template. As Bryan puts it, the point is to help you feel like the younger version of yourself, the one with better energy and sharper focus.

DEXA body compositionRMR50 biomarkersHormone therapyPeptides
What we do hereMatt · Operations Manager
What we do here

Your in-house care team.

“What we do here is give people personalized diagnostic insights about how to go about their health journey.”

Matt runs operations, so he sees the whole path a client takes. It starts with diagnostic testing, body composition and metabolic testing, alongside a comprehensive blood panel read with clinical insight rather than handed over as a PDF.

What comes out the other side is a set of actionable steps, whether the goal is losing body fat, adding lean mass, simply feeling better day to day, or a long healthy life.

He describes the mission as positioning Prefusion as your in-house care team for everything metabolic, body composition and physiological. Not a lab you visit once, a team that stays with you.

Body compositionMetabolic testingComprehensive bloodworkClinical insight
★★★★★

Ten out of ten experience, super knowledgeable staff. I did the DEXA scan, RMR and VO2 max, then they sat me down and went through all of it, making sure I understood what my numbers meant and what to do next.

Allen Y. · Google
★★★★★

Bryan and the team have been consistently awesome to me and my friends. You get your raw scores, it is explained in person and on a handy app, and you leave with real recommendations on how to improve.

Andrew H. · Google
★★★★★

Matt was an incredible consultant. The optimization package finally gave me something concrete and efficient to work with. It has done a full 360 for my plans going forward.

Khao · Google
★★★★★

I am a personal trainer always looking for accuracy. The service was phenomenal, efficient yet detailed, a budget-friendly way to take control of your health empirically.

Franco · Google
★★★★★

Training for a race, I came in for the optimization package. Between the DEXA scan, RMR and VO2 testing, I have full clarity on where my health is and what I need to improve.

Elias Z. · Google
★★★★★

I am a big numbers girl, so seeing the detailed data from my DEXA scan and VO2 max was so helpful for my running goals. They guided and supported me the whole way.

Amy D. · Google
★★★★★

Super comprehensive results, all the detail on the app and a clear explanation in person. We loved it so much we bought a 6-pack to track our health journey.

Pallavi P. · Google
★★★★★

Wow, as a runner this is a must. The DEXA scan plus VO2 test took the guesswork out and helped me reassess my next training block. The team is so kind and knowledgeable.

Logan C. · Google
★★★★★

Far exceeded my expectations. Clean, no wait, a great scan experience and an incredible walk-through. Got a nice take-home packet and access to my data in their app.

Josh M. · Google
★★★★★

Ten out of ten experience, super knowledgeable staff. I did the DEXA scan, RMR and VO2 max, then they sat me down and went through all of it, making sure I understood what my numbers meant and what to do next.

Allen Y. · Google
★★★★★

Bryan and the team have been consistently awesome to me and my friends. You get your raw scores, it is explained in person and on a handy app, and you leave with real recommendations on how to improve.

Andrew H. · Google
★★★★★

Matt was an incredible consultant. The optimization package finally gave me something concrete and efficient to work with. It has done a full 360 for my plans going forward.

Khao · Google
★★★★★

I am a personal trainer always looking for accuracy. The service was phenomenal, efficient yet detailed, a budget-friendly way to take control of your health empirically.

Franco · Google
★★★★★

Training for a race, I came in for the optimization package. Between the DEXA scan, RMR and VO2 testing, I have full clarity on where my health is and what I need to improve.

Elias Z. · Google
★★★★★

I am a big numbers girl, so seeing the detailed data from my DEXA scan and VO2 max was so helpful for my running goals. They guided and supported me the whole way.

Amy D. · Google
★★★★★

Super comprehensive results, all the detail on the app and a clear explanation in person. We loved it so much we bought a 6-pack to track our health journey.

Pallavi P. · Google
★★★★★

Wow, as a runner this is a must. The DEXA scan plus VO2 test took the guesswork out and helped me reassess my next training block. The team is so kind and knowledgeable.

Logan C. · Google
★★★★★

Far exceeded my expectations. Clean, no wait, a great scan experience and an incredible walk-through. Got a nice take-home packet and access to my data in their app.

Josh M. · Google
★ 4.8 average across 55 verified Google reviews · Read them all
What we believe

Our principles

Measure first

No plan without data. We start with real, medical-grade measurement, every time.

Human care

A real team reads your data with you and helps you act on it. Not an app.

Evidence, never hype

We recommend therapy only when your data supports it, and we prove progress with retesting.

Come see what we are about.

Book your baseline and meet the team in person.

Book your baseline Call (516) 496-1717
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