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Frequently Asked Questions

The types of injuries most commonly treated by Regenexx procedures include fractures that have failed to heal, joint cartilage problems, chronic bursitis, avascular necrosis of the bone, lumbar disc bulges, and partial tears of tendons, muscles, or ligaments.

No. All Regenexx procedures use your own stem cells (autologous) drawn from bone marrow in your illiac crest (hip). Research has shown that your own stem cells derived from bone marrow (mesenchymal) are the most effective in healing orthopedic injuries.

Regenexx procedures are much less risky than typical surgical procedures because Regenexx proceduare are minimally invasive and do not require general anesthesia. Surgical procedures carry serious risk of complications or even death.

The Regenexx procedures are unique. They use many proprietary, innovative techniques to maximize stem-cell count and to ensure delivery and growth of those cells. See the Regenexx Difference for more information.

All of the Regenexx stem-cell and blood-platelet procedures performed in the United States today are FDA-compliant. These same-day procedures comply with CFR 21 Part 1271, falling under the same surgery exemption discussed in 1271.15 (b).
There is some common confusion about FDA approval of Regenexx as a result of reports about our case against the FDA the last few years. That case relates only to the Regenexx C procedure, which is different from any Regenexx procedures now being performed in the United States.

Dr. Paras Shah will look at your medical records and imagery and will speak with you about whether Regenexx procedures may help your problem.

We prefer CDs rather than hard copies of actual films, but we can work with either. Most imaging centers can easily and inexpensively burn a CD with the digital copies of your films. You can request these records from your previous providers, or you can authorize us to request your records on your behalf. Records should be sent to Regenexx Kansas City 1300 E. 104th St., Suite 150, Kansas City, MO 64131. When you complete a candidate form, you will receive complete instructions regarding the review process.

The growth factors that we use to grow your stem cells in the injection site are contained in your blood platelets. We need to draw blood in order to isolate and concentrate platelets for re-injection into the site of the stem-cell transplant.

A total of 50-200 cc may be drawn (a few teaspoons less than half a pint). A smaller amount of blood may be drawn if you weigh less than 110 pounds.

Patients often confuse a bone-marrow aspirate with a more involved and more painful bone-marrow biopsy. We only perform the less complicated and much more comfortable bone-marrow aspirate. Because we extensively numb the area, about eight in 10 patients say that the marrow draw is very comfortable and would do it again. More information about this topic is available here.

The procedure uses ultrasound-guided injection and so is about as painful as a typical shot at a doctor’s office.

The results should become apparent over one to three months, but your body continues to heal for as long as six to nine months following the injection.

Some patients will benefit from a second or even a third procedure. Our usual protocol involves one to three injection cycles. Most patients receive a single procedure.

Because our procedures supplement natural healing, early activity is strongly encouraged. Wait times are dependent on the type of procedure performed.

Joint Procedure
If there is minimal cartilage loss and in the case of a partial tendon / ligament / muscle tear, low-impact activities are encouraged immediately after the procedure. Full high-impact activities are expected within four to six weeks of the procedure.
In the case of a partial tendon / ligament / muscle tear, low-impact activities would be encouraged immediately after the procedure. Full high-impact activities would be expected at four to six weeks.

Bone-healing Procedures (for fracture non-union or avascular necrosis)
In these cases, patients are required to refrain from using the injured body part until the pain from the procedure subsides. They then can then begin slowly increasing activities over the next few weeks. This healing process typically takes one to three weeks, with normal activity resuming at about six weeks. The only exception is when there is an existing rod or plate stabilizing the fracture site—in that case normal activity may be resumed more quickly.

Regenexx Kansas City focuses our healing efforts beyond a single injured body part to help prevent return of the injury. As a result, it’s likely we will recommend other types of conservative care to restore normal biomechanics, including physical therapy, different types of myofascial release, or specific home exercises.

Success rate depends on the severity of the injury. Click here to view the latest Regenexx procedure outcome data.


cartilage repair



building new blood vessels