Stem Cell Therapy for Knee Pain: What Patients Need to Know in 2025

Stem Cell Therapy for Knee Pain: The Current State of Evidence

Knee osteoarthritis is one of the most common reasons patients seek stem cell therapy. With over 32 million Americans affected by knee OA, and knee replacement surgery carrying significant recovery time and risks, many patients are looking for alternatives.

**Important:** Stem cell therapy for knee osteoarthritis is experimental. No stem cell treatment is FDA-approved for this condition. Results vary significantly between patients.

What the Research Shows

Several small clinical studies have shown promising results for stem cell injections in knee osteoarthritis:

• A 2019 study in the *American Journal of Sports Medicine* found that bone marrow-derived MSC injections reduced pain scores by 50% or more in 73% of patients at 12 months.
• A 2021 meta-analysis of 18 trials found statistically significant improvements in pain and function, though the authors noted the studies were small and methodologically variable.

However, larger randomized controlled trials are still needed before stem cell therapy can be considered a proven treatment.

Types of Stem Cell Treatments for Knees

| Treatment | Source | Typical Cost | Evidence Level |

|-----------|--------|-------------|----------------|

| Bone Marrow Concentrate (BMAC) | Patient's own bone marrow | $5,000–$10,000 | Moderate |

| Adipose-Derived MSCs | Patient's own fat tissue | $4,000–$8,000 | Moderate |

| Umbilical Cord MSCs | Donor cord tissue | $3,000–$7,000 | Limited |

| PRP (Platelet-Rich Plasma) | Patient's own blood | $500–$2,500 | Moderate |

Who Is a Good Candidate?

Patients most likely to benefit from stem cell therapy for knees typically have:

• Mild to moderate osteoarthritis (Grade 1-3 on Kellgren-Lawrence scale)
• Localized cartilage damage rather than bone-on-bone arthritis
• Failed conservative treatments (physical therapy, cortisone injections)
• Are not yet candidates for or wish to delay knee replacement

Patients with severe bone-on-bone arthritis (Grade 4) typically see less benefit and may be better served by knee replacement.

Questions to Ask Your Clinic

1. What is your success rate for patients with my severity of OA?
2. What type of cells do you use, and where do they come from?
3. Do you have before-and-after imaging (MRI) to show cartilage changes?
4. What is included in the price (follow-up visits, imaging)?

Use the [StemConnect directory](/directory) to find clinics specializing in knee conditions near you.

This article is for informational purposes only. Consult an orthopedic specialist before pursuing any treatment.