Discover the Healing Journey at Assist Vitality
Our Team
Meet Our Doctor

Dr. Guillermo Castillo, MD
Medical Doctor
Integrative & Regenerative Medicine Specialist
PHYSICIAN-LED CLINICAL CARE
Dr. Castillo has a uniquely well-rounded perspective in the business and delivery of healthcare. Passionate about encouraging the persistent evolution of our healthcare system not only from the patient experience pathway but also from the physicians’ perspective.
Hailing from UCSD Medical Center & USC Keck School of Medicine and with more than two decades of experience, Dr. Castillo has developed an expertise in functional and regenerative medicine. He is certified in the clinical application and oversight of Placenta-Derived Protein Complex (PDPC+) therapies. This advanced certification reflects his commitment to staying at the forefront of regenerative and restorative medicine.
Dr. Castillo has dedicated his career to helping patients regain mobility and improve their quality of life through regenerative medicine.

