





Marc Darrow, MD., JD.
Marc Darrow, MD., JD. is the medical director and founder of the Darrow Stem Cell Institute in Los Angeles, California. With over 20 years experience in regenerative medicine techniques and the treatment of thousands of patients, Dr. Darrow is considered a leading pioneer in the non-surgical treatment of degenerative Musculoskeletal Disorders and sports related injuries. He is one of the busiest Regenerative Medicine doctors in the world.
Dr. Darrow has co-authored and continues to co-author leading edge medical research including the use of bone marrow derived stem cell therapy for shoulder, hip, knee and spinal disorders. He also comments and writes on research surrounding the treatment of chronic tendon injury, ankle and foot pain, elbow, hand and finger pain.

The Stem Cell Institute
- Dr. Darrow himself suffered from a failed shoulder surgery that lead him unto this path of healing.
- Dr. Darrow studied in medical school as a surgeon.
Research from the Stem Cell Institute
Knee pain and osteoarthritis
In June of 2018, our research team published the paper Short-Term Outcomes in Treatment of Knee Osteoarthritis With 4 Bone Marrow Concentrate Injections. This research appeared in the medical journal: Clinical medicine insights. Arthritis and musculoskeletal disorders.
In this research we were able to conclude that following treatment, short-term outcomes demonstrated that patients experienced less pain and were able to perform daily activities with less difficulty after the first Bone Marrow Concentrate (stem cell) injection and reported additional benefit with each subsequent treatment.
- We incorporated this research into our article: Stem cell therapy for knee osteoarthritis
- You can read this research in its entirety at the US National Library of Medicine online:
Other research that we will soon publish on the subject of knee osteoarthritis include: Treatment of Chronic Knee Pain with Platelet-Rich Plasma Injections
- You can learn more about this treatment at my article: Platelet-Rich Plasma Injections for knee osteoarthritis
Hip pain and osteoarthritis
In August 2018, our research team published the paper Short-Term Outcomes of Treatment of Hip Osteoarthritis With 4 Bone Marrow Concentrate Injections: A Case Series. This research appeared in the medical journal: Clinical medicine insights. Case reports.
In this study, we were able to document that the patients in this case series experienced decreased pain and improved functionality compared with baseline. On average, patients experienced successive decreases in resting and active pain after each treatment. Patients also experienced a mean increase in total overall improvement percentage and functionality score after subsequent treatments. Prior to Bone Marrow Concentrate (stem cell) treatment, 2 of the 4 patients had been advised to undergo total hip replacement. Following treatment, neither patient considered surgery.
- We incorporated this research into our article: Can Stem Cell Therapy help you avoid a hip replacement surgery?
- You can read this research in its entirety at the US National Library of Medicine online:
- Comparing Outcomes of Spun and Whole Bone Marrow Concentrate injections in Hip and Shoulder Pain Patients
- Treatment of Chronic Hip Pain with Platelet-Rich Plasma Injections.
Lower back pain
In July 2018, our research team published the paper Treatment of Lower Back Pain with Bone Marrow Concentrate. This research appeared in the medical journal: Biomedical Journal of Scientific & Technical Research.
This is the first reported study treating low back with Bone Marrow Concentrate injections to the ligaments, fascia, and muscles surrounding the lumbar spine. It is promising that at one-year follow-up, 100% of patients in this study experienced a decrease in resting and active pain in addition to performing daily activities with less difficulty.
- All four patients experienced sustained or increased improvement at annual follow-up compared to short-term follow-up.
- On average, patients reported:
- 80% decrease in resting pain,
- 78% decrease in active pain,
- and a 41% increase in functionality score.
- Additionally, patients reported a mean 80% total overall improvement following treatment.
- The two patients who considered surgery prior to BMC treatment no longer felt the need for it.
- These results provide evidence that appropriately chosen patients with LBP may find relief with BMC injections.
- You can read this research in its entirety at the Journal’s website.
- Treatment of Chronic Low Back Pain with Platelet-Rich Plasma Injections
Shoulder Pain
- Treatment of Shoulder Osteoarthritis and Rotator Cuff Tears with Spun and Whole Bone Marrow Concentrate Injections
- Comparing Outcomes of Spun and Whole Bone Marrow Concentrate injections in Hip and Shoulder Pain Patients
In these papers we have documented the positive aspects of bone marrow derived stem cell therapy for patients who have shoulder osteoarthritis.
Articles and research concerning shoulder injury on this site:
Dr. Darrow comments on the latest research impacting patients with the following shoulder disorders: