Regenerative medicine occupies an unusual space in American healthcare. Some of it is delivered by board-certified specialists who will tell you honestly that the evidence is mixed. Some of it is sold out of strip malls by staff with no relevant training, at prices that run into five figures, for conditions no credible study has ever addressed.

Both can look identical from the parking lot. Both can have a polished website. The difference shows up in what happens when you ask questions.

This guide is information, not medical advice. It won't tell you whether a given treatment will work for you — no article can. It will help you screen out the operations that shouldn't be treating anyone.

Start with the FDA problem, because everything else follows from it

Most regenerative treatments marketed in the US are not FDA-approved for the uses they're being sold for.

That statement surprises patients, so it's worth being precise. Platelet-rich plasma is your own blood, spun in a centrifuge and reinjected. The FDA regulates the devices used to prepare it — several centrifuge systems have clearance — but clearance of a device is not approval of a treatment. Clearing a centrifuge for producing PRP says nothing about whether injecting that PRP into a knee, a scalp, or a spine works.

For cell-based products the situation is starker. The FDA has repeatedly stated that most stem cell products offered in US clinics are unapproved drugs, and it has issued a standing warning to consumers about clinics marketing them (FDA consumer update on stem cell therapies). The agency's approved cell and gene therapy list is short and mostly consists of blood-cancer treatments and a few specific tissue products — not injections for arthritis, autism, MS, or aging (FDA list of approved cellular and gene therapy products).

What "not FDA-approved" does mean: no regulator has reviewed evidence that this product is safe and effective for your condition, and it is legal for a clinic to charge you for it anyway. Insurance almost never covers it, which is why you'll be quoted a cash price.

What it does not mean: that the treatment is worthless or illegal. Physicians use unapproved and off-label approaches routinely, and some regenerative applications have real, if modest, supporting data.

A legitimate clinic will say all of this to your face. A storefront will imply the opposite — "FDA-registered facility," "FDA-cleared stem cells," "FDA-compliant lab." Registration is a mailing-list function. It is not a seal of approval, and the FDA says so directly.

What a real credential looks like

Board certification is the single most useful signal, and it is easy to verify yourself.

A legitimate specialist is certified by a member board of the American Board of Medical Specialties or the equivalent osteopathic body. For musculoskeletal injections that usually means orthopedic surgery, physical medicine and rehabilitation, sports medicine, or interventional pain. For hair and skin it means dermatology or plastic surgery. For anything gynecologic, obstetrics and gynecology or urology.

There is no ABMS board in "regenerative medicine." None. Any certificate using that phrase comes from a private organization that set its own standards, and some of those standards amount to a weekend course and a fee. The same applies to "anti-aging medicine," "cellular medicine," and most things described as a fellowship without a named sponsoring university or ACGME accreditation.

Two checks take ten minutes:

  • Look the physician up on Certification Matters (linked above) or the specific board's own site. Confirm the specialty matches the body part being treated.
  • Search your state medical board's license lookup for the license status and any disciplinary actions. Every state has one and they are free.

Also ask, plainly: who performs the injection? In some clinics a physician is the marketing face and a nurse, medical assistant, or chiropractor does the procedure. That may be legal depending on the state and the procedure, and it may be fine — but you should know before you're on the table, not after.

What an NPI number is, and what it is not

You'll see clinics cite an NPI as evidence of legitimacy. It isn't.

An NPI — National Provider Identifier — is a ten-digit number CMS assigns to healthcare providers so claims and records can be routed correctly. It is administrative plumbing. Applying is free, and CMS does not evaluate your competence, your credentials, or the quality of your care before issuing one (CMS NPPES / NPI overview).

An NPI tells you a provider exists in the federal registry and what taxonomy code they selected for themselves. It does not tell you they are board-certified, licensed in good standing, or qualified to inject anything.

Where the NPI registry is useful is as a cross-check. If a clinic's website calls someone a "regenerative orthopedic specialist" and the registry taxonomy says chiropractic or naturopathy, you've learned something the brochure didn't tell you.

The red flags

These are the patterns that consistently separate medicine from sales.

Guaranteed results. No honest clinician guarantees an outcome from a biologic injection, because the data don't support guarantees. Most state medical boards treat outcome guarantees as deceptive advertising. A money-back promise is not confidence; it's a pricing strategy built on the knowledge that few patients will pursue a refund.

Stem cells "for everything." A clinic that treats knee arthritis, hair loss, neuropathy, erectile dysfunction, long COVID, autism, and MS with the same injection is not practicing a specialty. It's selling a product. The FDA and the FTC have both taken enforcement action against clinics marketing cell products for unrelated serious diseases, and the harms have included blindness and serious infections. A 2017 report in the New England Journal of Medicine documented severe vision loss in three patients after intravitreal injection of adipose-derived cells at a commercial clinic (Kuriyan et al., NEJM 2017).

Pressure to prepay a package. Six sessions, discounted, payable today. Packages front-load the clinic's revenue and eliminate the natural checkpoint where you and your physician assess whether anything is working. A reasonable structure is one treatment, a defined follow-up interval, and a decision. Financing offered at the point of sale, before you've had time to think, is a sales tactic borrowed from car dealerships.

A diagnosis that arrived before the workup. If you were told PRP is the answer before anyone examined you, reviewed imaging, or discussed cheaper first-line options — physical therapy, topical or oral medication, load management, a corticosteroid injection — the recommendation is about inventory, not about you.

No named alternatives, no named risks. Real informed consent includes what else you could do, what happens if you do nothing, and what can go wrong. Injections carry infection risk, bleeding risk, post-injection flares, and the risk of no benefit at all.

Testimonials instead of data. Ask for the evidence and a good clinic will name trials and describe their limits. A storefront will hand you before-and-after photos and a five-star review page.

Umbilical, amniotic, or "young donor" cells sold as living stem cells. Commercially available amniotic and umbilical products marketed this way have, on analysis, generally contained few or no viable stem cells. Products sold this way have also been the source of serious bacterial infection outbreaks investigated by the CDC. Be skeptical of any injection described as containing another person's live cells.

Questions worth asking out loud

  • What is your board certification, and in what specialty?
  • Are you performing the injection yourself?
  • Is this FDA-approved for my condition? (Listen for a straight "no.")
  • What published evidence supports this for what I have, and what are its weaknesses?
  • What's the full cost, including imaging, follow-ups, and any repeat session?
  • What's your complication rate, and what happens if I get an infection?
  • What are the non-injection options, and why aren't we trying those first?
  • How will we decide whether this worked, and at what point do we stop?

The answers matter less than the reaction. A clinician who welcomes these questions is someone you can make a decision with. A clinician who deflects, flatters, or pivots to the discount has told you what you needed to know.

A reasonable price expectation

Cash-pay PRP for a single joint or a scalp session commonly runs from a few hundred dollars to around fifteen hundred, varying widely by region and by how much preparation and imaging guidance is involved. Bone-marrow or fat-derived cell procedures are typically quoted in the low-to-mid thousands per treatment, and clinics selling multi-region or IV cell protocols sometimes reach five figures.

Price is not a quality signal in either direction. An unusually cheap PRP session may reflect a low-concentration preparation; a five-figure quote buys no additional evidence. What it does tell you is how much you're risking on a treatment that no regulator has vouched for — which is the whole reason to screen the clinic first.