Stem Cell Injections ArizonaAbout R3 Stem Cell Centers

R3 Stem Cell’s Centers of Excellence in greater Los Angeles provide treatment options that offer patients hope and pain relief. Hope that potentially risky surgery can be avoided, and arthritis and soft tissue injury can be repaired  with the individual then being able do things like swim, hike, play with your kids again, ride a bike and be… Free of Pain!

Existing pain therapies have been great at decreasing pain by masking discomfort in a “band aid” fashion with medications such as narcotics, cortisone, or NSAIDS.

These treatments have been excellent for relief, but they DON’T repair the underlying problem!

Fixing Tissue Injury

So how is the problem truly repaired at our stem cell treatment centers in Los Angeles metro, whether it’s neck or back pain, joint arthritis, achilles tendonitis, golfers/tennis elbow, sports injuries, rotator cuff tendonitis, ligament injury?

Regenerative Medicine at R3 Stem Cell centers has the possibility for restoring normal anatomy by using treatment with stem cells, platelet rich plasma therapy and growth factors to promote a healing response in your own body. Therapies are performed under a proprietary IRB approved protocol, which very few Centers have in place.

Stem Cells are a veritable “blank slate” and can morph into several types of cells helpful for tissue regeneration depending on the environment in which they are placed.

R3 Stem Cell Treatments

R3 stem cell injection treatments including:Platelet Rich Plasma Therapy Research

These are all minimal risk, outpatient therapies. All of the injections are performed either into joints or soft tissues by the highly skilled providers at the Centers.

Initial studies are showing these regenerative therapies to have significant promise in healing injury while decreasing pain. For example, several professional sports leagues have approved of PRP therapy along with the WADA.

Pro athletes who have undergone regenerative medicine therapies performed include the likes of Kobe Bryant, Rafael Nadal, Dwight Howard, Tiger Woods and many more. A Sports Illustrated article from last year stated that hundreds of NFL players have undergone regenerative treatments in order to prolong their careers.

All of the treatments at R3 Stem Cell centers are administered by licensed, expert providers who care deeply about improving their patient’s quality of lives!

Mission Statement

R3 Stem Cell centers offer cutting edge regenerative medicine therapies with the possibility of repair, regeneration and restoring damaged tissue. This may offer individuals reduced pain and increases functional ability with outpatient treatments that are low risk and nonoperative. R3 Stem Cell desires to make a difference in patient’s lives by helping them avoid surgery and remain as active as desired.


Larry Halem, MD

Dr. Larry Halem, M.D., grew up in sunny Thousand Oaks, California. He attended University of California, Riverside, and earned a Bachelors degree in Biomedical Sciences. He then attended University of California, Los Angeles, and achieved his medical degree in 2003. Dr. Halem trained at Harbor-UCLA in Emergency Medicine.

After graduating, Dr. Halem began working at Santa Monica UCLA Medical Center in the Emergency Room and is currently the Assistant Medical Director of the Emergency Department. He has been a board certified Emergency Medicine physician since 2006. 

Personally, his interests include scuba diving, snowboarding, and beach volleyball.

Pejman Shirazy, MD

Dr. Shirazy is a Board Certified medical doctor who has completed his medical training at UCLA’s School of Medicine. Dr. Shirazy has completed specialty training in the field of physical medicine, rehabilitation, and interventional pain management. Dr. Shirazy was appointed as chief resident, elected unanimously by the physicians at UCLA, Cedars Sinai, and the nationally renowned, Rancho Los Amigo Rehabilitation Center.

At UCLA, Dr. Shirazy completed numerous spinal procedures ranging from epidural injections, facet injections, nerve blocks, discogram, and radiofrequency procedures. He completed his training at the Orthopedic & Spine Center at UCLA where he gained vast experience in diagnosis, management, and treatment of neuromuscular skeletal disorders.

In addition, Dr. Shirazy is board certified in performing electro-diagnostic studies including electromyography and nerve conductions studies. His interpersonal skills and clinical skills have proved to be effective in the management of chronic pain patients. Dr. Shirazy has been practicing medicine since 2003. His practice has focused on orthopedic conditions and interventional pain management addressing the treatment of these conditions. Dr. Shirazy bas performed State-Of-The-Art Treatment in platelet rich plasma procedures and stem cell regenerative therapy to address injuries in the musculoskeletal system prior to surgical interventions. 

Jay Jazayeri, MD

Dr. Jazayeri is Board Certified in orthopaedic surgery and an expert in regenerative medicine procedures with stem cell therapy. He  He sees patients at the R3 Stem Cell Center of Excellence practice in Long Beach, CA.

He graduated from the University of Tehran School of Medicine and completed his surgical residency at Mount Sinai Hospital of Cleveland and his orthopaedic residency Albert Einstein College of Medicine.

He states, “I firmly believe in the philosophy that you should treat people the way you want to be treated. Therefore, when I see a patient, I try to put myself in his/her place and act accordingly.”


Languages Spoken

Board Certifications

Professional Memberships

Zhenghong Yuan, MD

Dr. Yuan is a Board Certified physician serving patients in San Gabriel and surrounding communities with Regenerative Medicine procedures including stem cell therapy.

He is Board-Certified on the American Board of Family Medicine. He consistently provides an excellent patient experience for those visiting his office. Dr. Yuan and his staff speak both English and Mandarin. Patient satisfaction is of highest priority to Dr. Yuan.


  • Second Military Medical University
    Medical School | Graduated 1983
  • Xavier University School of Medicine, Aruba
    Medical School | Graduated 2007
  • Trover Foundation
    Internship Hospital | Completed 2007
  • Trover Foundation
    Residency Hospital | Completed 2010

Garrett Glapa, ACNP-BC, Nurse Practitioner

As a Nurse Practitioner, Garrett’s focus is in the area of acute care. He obtained his Bachelor’s degree in nursing from the Univ. of Wisconsin, Milwaukee, and his Master’s degree from UCLA.

Garrett comes to Prohealth Physical Medicine with experience ranging from working in the fast pace of emergency departments to his experience at a comprehensive orthopedic spine center. Garrett’s attention to detail and compassion make him a valuable member of the Prohealth Physical Medicine team.


If you would like to receive stem cell treatment in Los Angeles, CONTACT US or call (310) 507-9464 today!