Meet RBI's Team
RBI's team is composed of experienced physicians, scientists and professionals that are dedicated to helping patients look and feel their best!
Jason Griffeth, M.S.
Co-Founder & Regenerative Medicine Specialist
Mr. Griffeth is an expert in the field of Regenerative Medicine having spent over 20 years in the space. He has been part of the treatment of thousands of patients and has directed the science & development of a number of pioneering regenerative therapies. He has worked with clinicians to develop some of the most advanced regenerative medicine treatment protocols available. He has traveled the world to train physicians on regenerative techniques.
Mr. Griffeth has also managed some of the largest pre-clinical & clinical trials in the field including using regenerative cells, platelet rich plasma (PRP) and growth factors to treat orthopedic and cardiovascular patients. These clinical trials took place at most of the leading research hospitals in the United States including Cleveland Clinic, Mayo Clinic, Scripps Research Hospital, Duke University, Mount Sinai Hospital and more. He also played a leading role in developing a gene-modified cellular treatment that led to the first ever IND approval by the FDA for a stem cell, gene therapy combination therapy. He has a B.S. in Microbiology & Cell Science and an M.S. Degree both from the University of Florida.
Click Here to Read More About Mr. Griffeth in this News Story
Regenerative Medicine Scientist
Ashley Grall, APRN
Men & Women's Health Specialist
Ashley is an experienced Nurse Practitioner who earned her master’s degree from Florida Atlantic University and her national certification through American Association of Nurse Practitioners in 2021. Her background as a registered nurse began in 2005 which has given her an exceptional and broad foundation in medicine. She brings a wealth of knowledge, compassion, and clinical expertise to our practice. Since becoming a nurse practitioner, she has spent several years serving in both emergency and hospital medicine at the renowned Cleveland Clinic.
Ashley is a vibrant and health-conscious native of Vero Beach, Florida. As a proud wife and mother of two, she regularly balances her family life with her passion for fitness and wellness. She is deeply passionate about personalized patient care and helping individuals take control of their health and vitality. Her background in both acute care and leadership roles has made her a confident, thoughtful provider who’s known for her quick thinking, collaborative approach, and commitment to improving lives. Whether you’re seeking support for primary care, chronic conditions, or optimizing long-term functional health and wellness, Ashley is here to guide you with experience and heart.
In addition to her vast nursing experience, Ashley has undergone training with the American Academy of Anti-Aging Medicine (A4M). The A4M is rooted in a forward-focused mission to redefine modern medicine. The A4M is the established global leader for continuing medical education in longevity medicine, metabolic resilience, and whole-person care. In consistently pushing beyond traditional standards of healthcare and disseminating the latest and most innovative clinical strategies in modern medicine, the A4M has spent nearly three decades equipping clinicians from across the globe to combat the growing burden of age-related disease and improve the human health span.
Jay Johnston, PA-C
Orthopedic Specialist & Men's Health Specialist
Jay Johnston, PA-C brings over 20 years of orthopedic and joint injection expertise to RBI, with a strong clinical background in musculoskeletal medicine. In addition to his extensive experience in orthopedic care, Jay is also trained in Functional Medicine, including testosterone optimization, to help men improve energy, performance, and overall well-being.
Jay has a well-developed ability to perform comprehensive medical histories, physical examinations, joint injections, and other in-office procedures. His approach to care is both precise and patient-focused, with an emphasis on optimizing health outcomes.
He is board certified by the National Commission on Certification of Physician Assistants and licensed by the Florida State Board of Medical Examiners. He is also a member of the American Academy of Physician Assistants.
Jay earned a Bachelor of Science in Molecular and Microbiology from the University of Central Florida in 2003. He went on to receive both a Master of Medical Science and a Bachelor of Science in Physician Assistant Studies from Nova Southeastern University in 2006.
Angela Bischoff, Clinical Aesthetician
Angela is licensed Skin-Care Specialist that is well versed in noninvasive facial treatments, spa services, skincare products, cosmetic trends, and overall skin health. She also provides specialty facials such as RF microneedling, PRP Facials, microdermabrasion, oxygen, chemical peels, and micropigmentation.
Angela offers superb customer service by assisting patients with treatment selections best suited for their skin type and lifestyle, thoroughly explaining pre and post care instructions, and recommending home regimens.
Angela has established a loyal clientele by creating friendly, yet professional relationships.
Medical Assistants
Taylor Davis
Taylor is a dedicated Graduated Practical Nurse with strong organizational skills. She brings over eight years of experience in the health care setting. Taylor is dedicated to delivering consistent and focused attention to client safety & comfort and ensuring patients have the best experience possible at RBI. She utilizes her acquired nursing expertise to achieve the highest level of patient care.
Taylor Watford
Taylor Watford joined the RBI team as a Medical Assistant in 2022 and has been a great addition to our team. Taylor brings a positive attitude to our practice every day and is always willing to help patients have a pleasant experience.
Medical Advisory Board
Richard Steinfeld, M.D.
Dr. Steinfeld is a Board-Certified Orthopaedic Surgeon. His orthopaedic specialties includes sports injuries, hip, knee, and shoulder reconstruction, general orthopaedics (including foot/ankle and hand surgery), as well as fracture care.
- Diplomate, American Board of Orthopaedic Surgery
- Fellow, American Academy of Orthopaedic Surgeon
- Adult Hip, Knee and Shoulder Reconstruction/Sports Medicine
Dr. Steinfeld's education and training have been unique and extensive. He completed his undergraduate studies at the University of Wisconsin-Madison receiving a degree in Psychology. He was awarded his Medical Degree from the The New Jersey Medical School in 1992.
Dr. Steinfeld completed his internship in General Surgery at the Mayo Clinic in Rochester, Minnesota. After US Naval Flight Training at the Naval Aerospace Medical Institute, he spent three years as Flight Surgeon and Head of Aviation Medicine at Naval Air Station Key West. Dr. Steinfeld returned to the Mayo Clinic and completed his residency in Orthopaedic Surgery. He was then chosen to undertake a Clinical Fellowship in Knee Surgery with John Bartlett, MD, in Melbourne, Australia finishing in June 2001.
Miguel Rivera, M.D.
Miguel A. Rivera, M.D. founded the Florida Institute for Physical Rehabilitation. He has been practicing Physical Medicine & Rehabilitation and Interventional Pain Management for over 10 years.
- Board Certified, American Board of Physical Medicine and Rehabilitation
- Board Certified, American Board of Pain Medicine
Dr. Rivera has devoted much time to his profession. His goal is to help those in obtaining relief and regaining a fulfilling lifestyle. He is Board Certified by the American Board of Physical Medicine & Rehabilitation and the American Board of Pain Medicine. Dr. Rivera’s special area of interest is to establish a comprehensive approach in the treatment of patients suffering from neuro-musculoskeletal pain and spine conditions. This treatment may involve the use of many modalities including physical therapy, neuro-musculoskeletal, intra-articular injections, regenerative medicine and X-ray guided spinal injections.
