The short answer
Stem cell therapy for knee osteoarthritis is an experimental, cash-pay treatment. In the US a single knee injection typically runs $5,000-$8,000 per joint; in Mexico orthopedic protocols commonly run $3,750-$8,000. It is not FDA-approved for any orthopedic condition, and insurers treat it as investigational.
The evidence is mixed: some trials show pain and function improvement, while a large 480-patient trial found it no more effective than a steroid shot at 12 months. It is not a cure and outcomes are not guaranteed. Discuss it with your physician first.
Important Regulatory Notice
As of 2026, the FDA has not approved any stem cell therapy for orthopedic conditions, including knee osteoarthritis, cartilage defects, or joint pain. These treatments are considered experimental. Clinics abroad operate under different regulators (in Mexico, COFEPRIS).
This guide is educational and does not recommend or endorse stem cell therapy for your knees. It does not claim the treatment cures, reverses, or repairs osteoarthritis. Talk to a licensed physician before considering any therapy.
Why knees are the #1 reason people look abroad
Knee osteoarthritis is common, painful, and progressive, and the conventional pathway — physical therapy, anti-inflammatories, cortisone injections, then eventually a knee replacement — leaves a gap. People who aren't ready for (or want to delay) surgery often go looking for something in between. That is the gap regenerative clinics market into, which is why orthopedic cases dominate stem cell tourism to Mexico.
That demand is real, but it's important to separate the marketing from the evidence. The rest of this guide does that.
What the treatment actually involves
For knees, the most common approaches are an injection directly into the joint (intra-articular), sometimes combined with an IV infusion. Cell types vary by where you go:
- US clinics most often use your own cells — bone marrow aspirate concentrate (BMAC), adipose (fat-derived) preparations, or platelet-rich plasma (PRP).
- Mexico clinics more often use donor mesenchymal stem cells (MSCs) from umbilical-cord tissue, sometimes culture-expanded to larger numbers.
The procedure itself is usually outpatient with minimal downtime. The variation in cell source, cell count, and processing is exactly why prices and protocols differ so much between clinics.
What it costs
Knee stem cell cost (estimates)
| Where / what | Typical cost |
|---|---|
| US — single knee injection (MSC/BMAC) | $5,000-$8,000 per joint |
| US — both knees (bilateral) | often $10,000-$15,000+ |
| Mexico — orthopedic protocol | $3,750-$8,000 |
| Exosome therapy (cell-free, where offered) | $3,000-$10,000 |
US figures from aggregated regenerative-clinic pricing (2026); Mexico figures from our Mexico stem cell guide. Estimates only — confirm directly with the clinic. See the full breakdown in our stem cell therapy cost guide.
Remember the quoted number rarely includes the trip. Budget for flights ($200-$600 round-trip to Mexico), lodging ($80-$200/night for 3-5 nights), meals, and any follow-up imaging or labs not bundled into the price.
What the evidence actually shows
This is the part the marketing usually skips. The honest summary is: mixed and still developing.
What the research suggests
- • Some randomized controlled trials and a pooled meta-analysis report moderate improvement in pain and function (WOMAC) scores at 12 months after intra-articular MSC injection, with lower doses (≤25 million cells) appearing effective.
- • Across studies, properly processed MSC injections have shown a generally favorable short-term safety profile, with no serious adverse reactions reported in major trials.
- • Multiple Phase 3 trials for MSC knee osteoarthritis are currently underway, which is itself a signal the question is not settled.
The important counterweight
- • A large 480-patient multicenter trial found MSC knee injections were no more effective than corticosteroid (steroid) injections at 12 months.
- • Optimal cell type, dose, and which patients benefit are not established.
- • No orthopedic stem cell therapy is FDA-approved. Higher cost does not buy a better-proven result.
- • Long-term durability of any benefit is not well studied.
The takeaway: this is a reasonable thing to ask your orthopedist about, not a proven alternative to established care. Anyone promising it will "regrow cartilage," "reverse arthritis," or let you "avoid surgery for sure" is overselling what the evidence supports.
Why people choose Mexico specifically
For knee cases, the draw is straightforward:
- Cost — orthopedic protocols often run $3,750-$8,000 vs $5,000-$8,000+ per joint in the US.
- Proximity — Tijuana is roughly 20 minutes from San Diego; no long flight.
- Availability — COFEPRIS permits MSC treatments that aren't offered in the US clinical market.
For the full destination picture — clinics, logistics, and what a treatment trip looks like day by day — see our Mexico stem cell guide and the head-to-head US vs Mexico stem cell comparison.
How to vet a clinic for a knee case
If you and your physician decide it's worth exploring, due diligence is everything. Ask:
- What cells, from where, and how many? Fresh autologous, donor umbilical-cord, or culture-expanded?
- What is your COFEPRIS / regulatory standing and where is your lab certified?
- How many knee/orthopedic cases have you treated, and what realistic results do patients see?
- Exactly what's in the price — imaging, the injection, IV, follow-up?
- What happens if I have a complication after I fly home?
Walk away if a clinic…
- ✗ Promises a "cure," "cartilage regrowth," or guaranteed results
- ✗ Won't disclose cell source, type, or count
- ✗ Has no verifiable physician credentials or lab certification
- ✗ Pressures you to book immediately
- ✗ Tells you to skip your orthopedist's advice
Who should be cautious
- Anyone with active cancer — stem cells may theoretically promote tumor growth.
- Anyone with an active infection — you need to be healthy for an injection.
- Anyone expecting a cure — the realistic goal, if any, is symptom improvement, not reversal.
- Anyone who hasn't tried proven options — PT, weight management, and conventional care first.
Frequently asked questions
How much does stem cell therapy for knees cost?
US: $5,000-$8,000 per joint (both knees often $10,000-$15,000+). Mexico: $3,750-$8,000 for an orthopedic protocol. Estimates only — confirm with the clinic.
Is it FDA-approved?
No. As of 2026 there is no FDA-approved stem cell therapy for any orthopedic condition. Insurers classify it as investigational and don't reimburse it.
Does it actually work?
The evidence is mixed. Some trials show improvement in pain/function at 12 months; a large 480-patient trial found it no better than a steroid shot at 12 months. It appeared safe but is not a guaranteed or curative treatment.
Why Mexico?
Lower cost, proximity to the US, and a regulatory framework (COFEPRIS) that permits MSC treatments. Lower price doesn't imply better outcomes — vet the clinic carefully.
Medical & Regulatory Disclaimer
This guide is for educational purposes only and is not medical advice. Stem cell therapy for knee osteoarthritis is not FDA-approved and is considered experimental. Every price shown is an estimate to confirm directly with the provider.
We make no claim that this treatment cures, reverses, or repairs osteoarthritis, and we do not endorse or guarantee any clinic or outcome. Always consult a licensed physician before pursuing any therapy.