Product Description

Known For: Full longevity destination with advanced diagnostics (MRI, full-body imaging), two MDs on staff, and walk-in availability Monday through Friday

HealingMaps Take: Extension Health is not just a peptide clinic. It is a full longevity destination with advanced imaging, diagnostics, IV therapy, and regenerative medicine all under one roof. Two MDs with complementary backgrounds (internal and emergency medicine) provide strong clinical oversight. Walk-in availability five days a week removes scheduling barriers.

Patient Review

“Extension Health feels like the future of medicine. The imaging, diagnostics, and peptide program are all integrated into one seamless experience. — Yelp Review”

About Extension Health

Extension Health is a longevity and concierge medicine clinic in Manhattan’s West Village. Dr. Jonathann Kuo (15+ years, 50,000+ patients) and Dr. James Salway (board certified emergency medicine) lead the clinical team. The clinic offers peptide therapy alongside advanced imaging (MRI, full-body scans), IV therapy, and regenerative treatments. A recently opened Midtown imaging center extends the diagnostic capabilities. Walk-ins are accepted Monday through Friday, 9am to 5pm.

For more on how peptide therapy works, see our guide to peptide therapy.

What People Like

Patients appreciate the all-in-one longevity approach. Two physicians provide a higher standard of oversight. Walk-in availability is rare for a practice at this level.

What People Don’t Like

The phone number is not publicly listed. The peptide menu is smaller than dedicated peptide specialists. Pricing is not transparent online.

Getting Started at Extension Health

Walk in Monday through Friday or book through the website. The team conducts diagnostic assessments before recommending peptide protocols alongside other longevity treatments.