New York clinics›Extension Health

Extension Health

West Village & Midtown East · Interventional longevity medicine

Two Manhattan clinics offering longevity diagnostics (DEXA, VO2 max, RMR, biological-age and toxin panels, and 3T full-body MRI through an imaging partner) alongside on-site interventional therapies including therapeutic plasma exchange and hyperbaric oxygen.

Jonathann Kuo, MD
Who you would see Jonathann Kuo, MD 2 · Manhattan clinics
Where160 7th Ave S, New York, NY 10014 (flagship); 110 E 60th St, Lower Level, New York, NY 10022
The shape of the assessment

A comprehensive assessment, in the parts it is built from.

  • Biomarkers
  • Imaging
  • Fitness testing
  • Genetics
  • Physician review
  • Ongoing tracking

Derived from the services this clinic publishes, not from anything it told us. It describes what the assessment covers, not how well it is done, and a narrower programme is the right choice for plenty of people. Components not listed are ones we could not confirm from the clinic’s own pages.

Who operates it

The care team

Who would actually see you, and what they trained in.

🏥 Part of Hudson Health group
Jonathann Kuo, MD
Founder · Hudson Health group

Jonathann Kuo, MD

Anesthesiology and Pain Medicine taxonomy; clinic publishes double board certification
2Manhattan clinics
Published qualifications

The double-board claim is the clinic’s own, and is shown here as the clinic publishes it.

•
Identity Jonathann Kuo, MD · anesthesiology and pain medicine, as published
📜
Board certification Clinic publishes double board certification; not confirmed against ABMS
•
Physician assistant Lauren Flandrich, PA · registered at 281 Broadway, Floor 2
•
Further clinicians Kathleen Léger MD, Salim El Sabbagh MD, Mishal Reja MD and Nick Copeli MD were each identity-confirmed
•
Unmatched provider James Salway, MD · name and title only
•
Group Sister brand to Hudson Medical and Hudson Mind under a common founder
Lauren Flandrich, PA

Lauren Flandrich, PA

Physician assistant
Physician assistant

KL

Kathleen Léger, MD

Physician
Nephrology, Internal Medicine and Critical Care taxonomies

Mishal Reja, MD

Mishal Reja, MD

Physician
Internal Medicine taxonomy

Nick Copeli, MD

Nick Copeli, MD

Physician
Emergency Medicine taxonomy

James Salway, MD

James Salway, MD

Physician
Physician

Team, training and credentials as described by the clinic on its website.

Start with the outcome

What this clinic can help you evaluate or manage

Plain-language goals come first. The clinic’s named tests, treatments and programs stay below for people who want the technical detail.

Care philosophy Regenerative & interventionalPerformance & optimization (secondary)

The published service spine is interventional (plasma exchange, ozone, PRP, peptides, hyperbaric oxygen) wrapped around a diagnostics intake.

01
Whole-body baseline

Establish where you stand today, before symptoms show up.

Clinic lists Baseline and Comprehensive Diagnostics Packages with a longevity consultation.
02
Cancer risk & screening

Catch many cancers at a stage where they are still treatable.

Clinic lists a 3T full-body MRI for cancer screening and early-detection cancer testing.
03
Genetics & biological age

Learn your inherited risks and how fast you are actually aging.

Clinic lists three distinct biological-age tests plus mitochondrial and genetic testing.
04
Strength, fitness & body composition

Measure the bone, muscle and fitness that keep you independent longer.

Clinic lists VO2 max, resting metabolic rate, DEXA and grip strength.
05
Environmental exposures

Assess heavy-metal and toxin exposure concerns with clear evidence labels.

Clinic lists individually priced heavy metals, PFAS, environmental toxin and mycotoxin panels.
How care is delivered Ongoing trackingWhole-person coordination
What they do

Services explained

Plain-language groupings help make different clinic service menus easier to understand and compare.

Diagnostics

Objective measurement used at intake and repeated within the membership programs.

DEXAVO2 maxResting metabolic rateGrip strength

Panels and screening

Blood and specialty panels, including biological-age and environmental exposure testing.

Core Longevity BloodworkThree biological-age testsHeavy metals, PFAS, mycotoxinsEarly-detection cancer testing

Imaging

Imaging delivered through a named external imaging partner rather than in-clinic.

3T full-body MRI via Central Park Advanced ImagingAvailable through the Midtown location

Interventional therapies

The interventional therapies that form the practice’s published spine; read the clinic’s own evidence disclaimers alongside them.

Therapeutic plasma exchange (West Village)Hyperbaric oxygen (West Village)EBOO ozone, PRP, peptidesClinical detox program
Testing & biomarkers

What the blood work actually covers.

Panel size
Not published as a count, per the clinic
Areas covered
Core Longevity Bloodwork · Three biological-age tests · Heavy metals, PFAS and mycotoxins · Early-detection cancer testing
Sample collection
Not published
Who reviews the results
Not published
Turnaround
Not published
Repeat testing
Not published
Included or add-on
Part of the membership programs rather than sold on its own.
Price
Not published
Pricing and payment model

What the clinic publishes

The Reboot$15,000 · see caveatThe memberships index states “$15K/DAY” while the Reboot’s own page describes two days in clinic and publishes no price. The total two-day cost is not published and we do not compute one.
The Catalyst$50,000 · annualClinic-published annual membership price.
The Superhuman$250,000 · annualClinic-published annual membership price, described as reserved for 25 members worldwide.
Therapeutic plasma exchange$10,000 · per sessionTwo to four hours at West Village; requires a $400 clearance consultation.
Hyperbaric oxygenFrom $300 · per session90-minute supervised sessions in the clinic’s own two-person chamber.
New patient consultationFrom $400 · per serviceClinic-published starting price.
Peptide consultation$250 · per serviceClinic-published price.
CORE Longevity Panel$300 · per serviceClinic states the panel covers “20+ aging biomarkers.”
Named laboratory panels$450–$900 · per serviceEight named panels including heavy metals $600, PFAS $600, environmental toxins $650 and mycotoxins $800.

Every figure above carries the billing basis the clinic published with it. Prices reflect clinic-published information and may change. Confirm inclusions and current fees directly with the clinic.

Recognition & affiliations

Published signals beyond the physician

Clinic-level memberships, institutional relationships and published positions. Physician training and board-certification claims are shown in the care team above.

Group relationship · Sister brand within the Hudson Health group under a common founder, alongside Hudson Medical and Hudson Mind. The clinic publishes no legal-entity detail.Origin · A rebrand of an existing site at 160 Seventh Ave S rather than a new clinic; the brand launched July 2024 but the practice predates itInsurance position · “Consultations are not covered by insurance at this time… Lab tests at Extension Health is self-pay only and not covered by insurance.”Hours · Mon–Fri 9AM–5PM at both locations, closed weekends, with accommodations outside these hours by request
Before you go

Practical information

Important planning details gathered from clinic-published information. Confirm anything that may affect your visit directly with the clinic.

InsuranceSelf-pay only; not coveredConfirm coverage and reimbursement requirements before booking.
TelehealthNot publishedAvailability can depend on the service and patient location.
Accepting patientsMemberships gated · waitlist applicationContact the clinic to confirm current scheduling.
ParkingNot publishedConfirm access details before your first visit.
Location160 7th Ave S, New York, NY 10014 (flagship); 110 E 60th St, Lower Level, New York, NY 10022Clinic-published address.
Phone929-556-6647Use for scheduling and practical questions.
Published pricingFrom $15,000 · The RebootSee the pricing section for inclusions and caveats.
AccessibilityNot publishedAsk the clinic about building and examination-room access.
Office hoursMon–Fri 9AM–5PM, closed weekendsBoth locations; accommodations outside these hours by request.
CancellationNot publishedNo cancellation, no-show, refund or deposit policy appears anywhere on the clinic’s site.
Bring this list

Questions worth asking this clinic

Drawn from what the clinic’s own materials leave open. Useful for a first call or consult.

What is the total cost of the two-day Reboot?
What is your cancellation, refund and deposit policy?
What evidence do you rely on for plasma exchange and hyperbaric oxygen, given your own “still emerging” disclaimer?