Dr. Sean Hassinger and his physician assistant Lindsey, offer a variety of Regenerative Medicine treatments, including Platelet Rich Plasma Injections (PRP) and stem cell injections. With years of surgical experience, Dr. Hassinger applies his surgical knowledge with Regenerative Medicine treatments to ensure quicker healing for patients.

Platelet rich plasma (prp)

Platelet Rich Plasma (PRP) is a concentration of platelets and growth factors from a blood draw of the patients blood. After the blood sample is drawn it goes through a rapid spinning process that separates the platelets and growth factors from the blood. The platelets and growth factors are then injected into the treatment site. Patients should expect the appointment to take around 30 minutes.

Allied Orthopaedics offers two kinds of PRP injections, Leukocyte Rich and Leukocyte Poor. Leukocyte Rich PRP is used to treat muscle and tendon injuries such as tendonitis and tendonosis. Leukocyte Poor PRP injections are used to treat mild to moderate arthritis. The difference between the two are the white blood cell counts in the injections. Leukocyte Rich indicates a higher white blood cell count to initiate and anti-inflammatory response to help with faster healing times. For treatment of arthritis, Leukocyte Poor is used to prevent and inflammatory reaction.

Bone marrow Aspirate Stem Cell concentrate (BMAC)

Bone marrow contains mesenchymal stem cells and hematopoietic stem cells. Stem cells are known to have the ability to to differentiate into many different tissue cells, such as muscle, tendon, ligament, bone, or blood cells. During the procedure, bone marrow is aspirated from locations on the body used to derive stem cells for your injection. The area is numbed prior to the procedure and you will experience pressure and possibly some mild discomfort. After the bone marrow is aspirated from the joint it is spun down to leave a higher concentration of cells to be injected into the treatment site.




Dr. Sean Hassinger


Dr. Sean Hassinger specializes in shoulder and knee arthroscopic surgery including ligament reconstruction, rotator cuff repair, meniscus repair, and cartilage transplantation. Recently, Dr. Hassinger has combined his years of surgical experience with Regenerative Medicine. He now combines the arthroscopic procedures with regenerative medicine injections, such as PRP and BMAC, to promote faster recovery timelines. These stem cell and PRP injections can be performed in the office or in the operating room combined with surgical procedures.

Dr. Sean Hassinger has extensive experience in the treatment of shoulder disorders. This includes the management of rotator cuff tears and tendonitis, arthritis, dislocations, and cartilage disorders. His training includes the use of the newest techniques in management of complex traumatic injuries.

Lindsey Carmichael


Lindsey has been a physician assistant for 7 years, with experience in cardiology and general surgery in addition to her 4 years of orthopedic experience at Direct Orthopedic Care and Allied Orthopaedics. Lindsey's orthopedic experience includes clinical evaluations, fracture care, casting and splinting, and surgical assisting. Lindsey has helped transition Dr. Hassinger’s practice to a Regenerative

Lindsey is originally from Eastern Oregon, but has lived and practiced in the Boise area for the past 10 years. Lindsey enjoys mountain biking, camping, and fishing with her husband, Josh and two year old daughter. She travels whenever she has the opportunity. 




Ron - Boise, ID

“I am eager to relay my recent experience with Dr. Hassinger and Lindsey Carmichael. I have been experiencing knee pain since sustaining a bone bruise in a bike race related crash in 2017. This pain consistently limited my ability to ride my bike, I do general exercise and work normally. I am fairly active in my job as a physical therapist and have had considerable trouble with squatting or demonstrating exercises. I was excited to learn that Dr. Hassinger was changing his practice to include interventional injections such as platelet rich plasma (PRP). I was hesitant to undergo another cortisone injection as the risk cartilage damage continues to increase with more injections, so PRP was perfect for me. The injection procedure was pretty simple. They drew blood from my arm, then spun it down in a centrifuge to separate the platelets. The platelets were then injected into my knee. Dr. Hassinger numbed my knee before the injection and I felt almost no discomfort. Since the injection, my knee pain decreased significantly. It now only has a mild ache after skiing or cycling. The pre-injection pain was continuously moderate, with increases during and after activity. Thanks a ton for your work. I would highly recommend this treatment for athletes or anyone having chronic musculoskeletal issues.”