Extension

Extension Health is a private healthcare company operating a physician-led longevity and regenerative medicine clinic in New York City. The company provides commercial diagnostics, imaging, biomarker testing, and personalized health optimization programs aimed at improving healthspan, performance, recovery, and chronic risk reduction. Its services span peptide therapy, regenerative medicine, therapeutic plasma exchange, hyperbaric oxygen, weight and metabolic health programs, and concierge-style memberships. Extension Health appears to be a clinical services business rather than a traditional drug-development biotech, with its offerings centered on integrated patient care rather than an internal therapeutic pipeline. The company was founded and is led by Dr. Jonathann Kuo and has expanded beyond its original West Village site to a Midtown location.