Dr. Gregorius is a board certified member of the American Board of Orthopaedic Surgery, and a Fellowship-trained Sports Medicine Specialist Orthopaedic Surgeon. He is also a Fellow member of the American Academy of Orthopaedic Surgeons and is an active member of California Orthopaedic Association.

Dr. Gregorius earned his undergraduate degree in History and Philosophy from Pacific Union College Suma Cum Laude while simultaneously completing his premedical curriculum. As an undergraduate student he was recognized with membership in the prestigious Phi Alpha Theta Honor Society. He also served as a student senator, senator pro tempore, and president of his graduating class. Following graduation, Dr. Gregorius attended Loma Linda University School of Medicine where he earned his medical degree.

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After graduating from medical school Dr. Gregorius completed a year of surgical training at Loma Linda University Medical Center. Then he went on to complete his Orthopaedic Surgical Residency at the University of Florida Orthopaedic Surgery and Sports Medicine Institute at the University of Florida in Gainesville Florida. Dr. Gregorius received orthopaedic sports medicine experience while providing assistant team coverage to University of Florida Athletics Department and team coverage to local high school athletics throughout Alachua County.

Dr. Gregorius then matriculated to Stanford University/SOAR combined Sports Medicine Fellowship in Palo Alto California. Under the direction of Dr. Michael Dilligham and Dr. Gary Fanton he received sports-specific training in Arthroscopic Surgery in the management of injuries to the Shoulder, Elbow, Hip, and Knee. In addition to participation in an active surgical fellowship training program, Dr. Gregorius provided assistant team coverage to the San Francisco 49ers, Stanford Football, and SAP Open Tennis. During this time he received tutelage on sideline team-specific injuries.

Following completion of his fellowship Dr. Gregorius went on to become a faculty member at Loma Linda University Medical Center and Director of the Orthopaedic Medical Student Program.

Dr. Gregorius currently provides team coverage to the University of California Riverside Athletic Department and the Dodgers single-A affiliate Rancho Cucamonga Quakes.