Stem cell therapy for knees cost runs about $3,000 to $8,000 per knee in the US in 2026, and you pay it yourself. Both knees in one session usually land between $6,000 and $14,000. The knee is the most common orthopedic target for these injections, so it has the clearest pricing. This guide covers one knee versus both, the add-ons that inflate a quote, and how the number stacks up against cortisone and physical therapy.
The figures below are typical 2026 self-pay ranges reported by US clinics. They are not set rates. Get an itemized quote in writing before you agree to anything.
One knee vs both knees
Treating both knees costs more than one, but rarely double in a clean way. The office visit, imaging setup, and any cell harvest are shared across both knees in a single session. The cells injected into each knee are not shared, so material cost still scales.
| Scenario | Typical US self-pay range | Notes |
|---|---|---|
| One knee, single injection | $3,000 – $8,000 | The baseline quote |
| Both knees, same session | $6,000 – $14,000 | Shared setup, doubled cell volume |
| One knee, two injections (course) | $6,000 – $14,000 | Second shot at 3–6 months |
| Both knees, two injections each | $12,000 – $24,000 | The high-end scenario |
Expect a both-knee quote around 1.7 to 2 times the single-knee price. If a clinic offers the second knee at a deep discount, ask what changed. A cut-rate second knee can mean fewer cells, which changes what you are buying.
What add-ons do to the knee price
The knee quote often excludes services you will still be billed for. Four extras commonly move the number.
Image guidance. Ultrasound helps place the needle in the joint. Some clinics include it, others add $150 to $600.
PRP. Platelet-rich plasma from your own blood is frequently sold alongside the injection, adding $500 to $2,000 per knee. Ask for it as a separate line.
Imaging workup. An X-ray or MRI to grade the arthritis may be billed on its own.
Follow-up. A recheck visit is sometimes free and sometimes $100 to $300.
A $5,000 single-knee quote with $1,000 of add-ons is really a $6,000 knee. Read every quote as a bundle.
Stem cell vs cortisone vs PT: the cost gap
Standard knee treatments cost a fraction of stem cell therapy and are usually covered. This is the comparison most clinics leave out of the sales conversation.
| Treatment for knee arthritis | Typical cost | Insurance |
|---|---|---|
| Cortisone (steroid) injection | $100 – $300 per shot | Usually covered |
| Hyaluronic acid (“gel”) injection | $300 – $1,500 per course | Often covered |
| Physical therapy course | $500 – $2,000 | Usually covered with copay |
| Stem cell injection | $3,000 – $8,000 per knee | Not covered |
The gap is 10 to 30 times. That does not make stem cell therapy wrong for you. It means the burden of proof is higher. Cortisone and physical therapy have decades of use and insurance backing. Stem cell knee injections are not FDA-approved for arthritis, and the evidence is still limited. Price the cheaper, covered options first, then decide if the premium is worth it to you.
Doing the knee cost math
Run the full-course number before you commit to stem cell therapy for your knees. The single-visit price hides the likely repeat.
Take a common example. A clinic quotes $6,000 for one knee. It recommends a second injection at five months, plus $300 in imaging. Your real first-year cost is:
- First injection: $6,000
- Second injection: $6,000
- Imaging: $300
- First-year total: $12,300
Now compare. A year of cortisone shots and physical therapy for the same knee might total $1,500 with insurance. Stem cell therapy may still be your call. The point is to make it against the true $12,300, not the brochure $6,000.
Questions to ask before you book a knee injection
Ask four questions on any knee quote. Each one guards against a hidden cost.
- What does the full recommended course total, one knee or both?
- Is image guidance and any PRP included, or billed separately?
- What is the cell source, and how many cells will be injected?
- What is the refund policy if the knee does not improve?
A clinic that answers in writing is easier to trust than one that quotes a round number. Avoid any clinic that promises to “get insurance to pay” for a knee injection. Insurers class it as experimental, so that is a sales line. Our insurance coverage guide explains the reasoning, and our overview of stem cell therapy for knees covers what the procedure involves.
The bottom line on knee stem cell cost
Stem cell therapy for knees cost of $3,000 to $8,000 per knee is the baseline, but the real budget depends on one knee or two, the add-ons, and any second injection. Both knees on a full course can reach $20,000 or more. Cortisone and physical therapy cost a fraction and are covered, so price them first. Get an itemized quote, run the full-year math, and use the cost estimator for a range tuned to your situation.
Frequently asked questions
How much does stem cell therapy for knees cost?
Stem cell therapy for one knee usually costs $3,000 to $8,000 in the US. Both knees in the same session often run $6,000 to $14,000. Insurance does not cover it for knee arthritis, so you pay out of pocket.
Does it cost less to do both knees at once?
Sometimes, but less than you might expect. Some clinics discount the second knee because the visit and setup are shared, but the cells for each knee still cost money. Expect roughly 1.7 to 2 times the single-knee price, not a half-price second knee.
How does the cost compare to a cortisone shot?
A cortisone knee injection costs far less, often $100 to $300 and usually covered by insurance. Physical therapy runs a few hundred dollars with a copay. Stem cell therapy for knees costs 10 to 30 times more and is not covered.
Will I need more than one injection?
Often yes. Many clinics recommend a second knee injection at 3 to 6 months, which can double your first-year cost. Ask what the full recommended course totals before you judge the price of a single visit.
Is stem cell therapy for knees FDA approved?
No. The FDA has not approved stem cell injections for knee osteoarthritis, and it treats most clinic offerings as unproven. That is the main reason insurers deny coverage and you pay the full price yourself.
Medical disclaimer. Medical Frontier is an independent educational resource. This page is for general information only and is not medical advice, diagnosis, or treatment, and does not create a doctor–patient relationship. Most regenerative therapies discussed here are not FDA-approved for the uses described and may be offered under limited exemptions or in clinical trials only. Always consult a licensed physician before making any treatment decision.