Extension Health – New York City, New York GLP-1 Weight Loss Clinics, Peptide Clinics, Recovery & Growth Peptide Clinics

HealingMaps Take: Extension Health offers 6 specific peptide compounds (BPC-157, CJC-1295, Semaglutide, Tirzepatide, PT-141, and Thymosin Alpha-1), placing it in the top half of the 20+ New York peptide clinics in our directory (the median clinic menu offers 6 compounds; the deepest offers 19). The clinic is physician-led (MD or DO); about half of New York peptide clinics in our directory are.

Extension Health offers 4 specific peptide compounds (BPC-157, CJC-1295, PT-141, and Thymosin Alpha-1), placing it in the bottom half of the 20+ New York peptide clinics in our directory (the median clinic menu offers 6 compounds; the deepest offers 19). The clinic is physician-led (MD or DO); about half of New York peptide clinics in our directory are.

Why We Picked Them: 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.

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.

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

Learn more about this treatment:

• Thymosin Alpha-1: The Immune System Peptide Clinicians Are Watching
• GLP-1s Got You Here — Now What? The Next Frontier of Peptide Wellness

Looking for more BPC-157 providers? Browse our directory of BPC-157 and recovery peptide clinics — including options in New York across the United States.

What to Expect at Your First Extension Health Appointment

1. Initial consultation / intake — typically 30–60 minutes reviewing medical history, goals, current medications, and prior labs.
2. Baseline lab work — most clinics require labs before prescribing growth-hormone secretagogues (CJC-1295/Ipamorelin, Sermorelin) and GLP-1s (semaglutide, tirzepatide), since those compounds modulate endocrine and metabolic pathways. Tissue-repair peptides (BPC-157, TB-500), sexual-wellness peptides (PT-141), and topical compounds are sometimes prescribed without labs. This listing doesn’t explicitly state lab requirements, so confirm on your consult call which panels they require for your specific protocol. Even when labs aren’t strictly required, they’re a smart personal baseline. See our guide to peptide therapy lab work for what to ask about.
3. Protocol design — based on what’s published, your provider may select from: BPC-157, CJC-1295, PT-141 or Thymosin Alpha-1. Final selection depends on your goals, lab results, and any contraindications.
4. Prescription written + sent to compounding pharmacy — The clinic doesn’t publicly state its 503A or 503B sourcing, so confirm fulfillment timing on your consult call (in-state-only vs. nationwide; compounded-after-Rx vs. pre-batched).
5. Self-administration training — for injectable peptides, the clinic walks you through subcutaneous injection technique, needle handling, refrigeration, and rotation sites.
6. Follow-up — typically a 4–6 week check-in to assess response, side effects, and whether dose or compound needs adjustment.

Most Extension Health patients report the consult-to-first-injection window runs 1–3 weeks depending on lab turnaround and pharmacy fulfillment.

What to Ask on Your Extension Health Consult Call

The questions below are pulled from the gaps in this specific listing — areas the clinic doesn’t publicly answer that you should clarify before booking. Each one is designed to get you a useful answer in 30 seconds or less.

• “Which of your peptides is most commonly prescribed for my goals?” Helps you understand whether the clinic’s expertise matches what you’re trying to achieve.
• “Is your compounding pharmacy 503A or 503B, and which specific pharmacy do you use?” The class affects whether your prescription is custom-compounded (503A) or pre-batched (503B), and whether they can ship across state lines.
• “How long has the clinical lead been prescribing peptides specifically?” A long medical career doesn’t always mean long peptide-specific experience — those are different track records.
• “Which lab panels do you require for the protocol you’d recommend for me?” Clinics typically require baseline labs for hormone-modulating compounds (semaglutide, tirzepatide, growth-hormone secretagogues) and may skip them for some tissue-repair or topical compounds. Knowing your clinic’s specific lab requirements helps you compare to peers — and even when not required, baseline labs are smart personal protection.
• “What’s the total first-month cost — consult fee, labs, and initial prescription combined?” First-month all-in is usually 1.5–2× the recurring monthly cost. Ask for an itemized breakdown.
• “Is follow-up telehealth-friendly, or are in-person visits required at every milestone?” The listing doesn’t mention telehealth — important to know if you travel or move.
• “From my consult to my first injection, how long is the typical timeline?” Lab turnaround + pharmacy fulfillment usually means 1–3 weeks. Confirms expectations.

Frequently Asked Questions

What peptides does Extension Health offer?

Based on this listing, Extension Health names 4 specific peptide compounds: BPC-157, CJC-1295, PT-141, and Thymosin Alpha-1. The clinic may offer additional compounds not published on its public listing — confirm the full menu on a consult call.

Is the clinical lead at Extension Health a verified physician?

Yes. Dr. Jonathann Kuo is registered in the federal CMS National Plan & Provider Enumeration System (NPPES) under NPI 1992966469, with a primary specialty of Anesthesiology, Pain Medicine and a primary practice address in New York, NY. The NPI has been active since 2008.

Does Extension Health offer telehealth or virtual visits?

Extension Health doesn’t mention telehealth or virtual visits on its listing. Most peptide clinics require in-person evaluation for the initial consult; some offer virtual follow-ups once a patient is stable. If geography or travel matters to you, ask on the consult call whether they can prescribe and follow up virtually — and which states they’re licensed to do so in.

How does Extension Health compare to other New York peptide clinics?

Among verified New York peptide clinics in the HealingMaps directory, Extension Health ranks in the bottom half of New York peptide clinics in the directory by compound depth. Compound depth is one signal among several — provider credentials, pharmacy sourcing transparency, and lab requirements also matter when comparing.

Where is Extension Health located?

Extension Health is located in New York, New York. The full street address, phone number, and hours are listed in the data card above.

What New York Peptide Patients Are Likely Asking

Themes drawn from HealingMaps editorial analysis of verified New York peptide clinics in our directory. Refreshed quarterly; percentages rounded to nearest 5%.

Which peptides do most New York clinics actually offer?

Across New York peptide clinics in our directory, BPC-157 appears in 65% of listings; CJC-1295 in 55%; Ipamorelin in 50%; Sermorelin in 40%. Compounds appearing in fewer than 20% of New York listings — including Semaglutide, Semax, TB-500 — are less commonly disclosed; patients seeking those should specifically ask whether the clinic prescribes them.

How transparent are New York clinics about their compounding pharmacy?

15% of New York clinics in our directory openly state whether they use a 503A or 503B compounding pharmacy. The rest leave the class unstated. The distinction matters for patients — 503A pharmacies fill prescriptions individually after your provider writes them (typically a few-day wait, in-state shipping), while 503B outsourcing facilities pre-batch under direct FDA inspection (often supporting same-visit fulfillment and direct-to-home shipping). Worth asking specifically before you book.

Who’s actually prescribing peptides in New York?

50% of verified New York clinics name an MD or DO as clinical lead (this listing’s clinical lead is Anesthesiology, Pain Medicine-trained). The remainder are NP/PA-led or don’t publicly name a specific prescribing clinician. Any state-licensed physician, NP, or PA can legitimately prescribe compounded peptides — but knowing your prescriber’s training and tenure helps you assess fit for your specific protocol.

How deep are New York peptide menus typically?

The median New York clinic in our directory publishes 6 specific peptide compounds on its listing. The deepest disclosed menu names 19; 10% of listings name no specific compounds at all. A wide menu means more options at one clinic; a narrow menu can reflect specialization (e.g. weight-loss-only programs) or limited public disclosure (the clinic prescribes more than it advertises).

Pharmacy sourcing: This clinic doesn’t state its 503A or 503B compounding pharmacy partner. The class affects how your prescription is fulfilled — custom-compounded with in-state shipping (503A) versus pre-batched with broader shipping including direct-to-home delivery (503B) — so it’s worth asking before starting any compounded protocol.

How we vetted this clinic

Extension Health’s named prescriber is verifiable in the CMS National Plan & Provider Enumeration System — the highest single trust signal we look for. The clinic names 4 specific peptide compounds — including BPC-157, CJC-1295, and PT-141. What’s not publicly stated: which pharmacy class (503A vs 503B) handles compounding. Worth asking on your consult call. See our full vetting rubric →

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