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HOI Names 2022-2023 Fellows

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Hoag Orthopedic Institute, one of the largest providers of orthopedic care in the nation, has announced five new fellows for the 2022-2023 academic year. The fellows will be completing the fellowship program in either arthroplasty, sports medicine or health policy and management.

“Hoag Orthopedic Institute is excited about this year’s class of fellows,” said Steven L. Barnett, M.D., chief medical officer of Hoag Orthopedic Institute. “With Hoag Orthopedic Institute’s guidance, we have the utmost confidence that our fellows will be some of the greatest surgeons and health care leaders of their generation.”

The 2022-2023 Hoag Orthopedic Institute fellows are:


  • Mark Cubberly, M.D.– Dr. Cubberly is a Southern California native, born at Hoag Hospital in Newport Beach and raised in Fountain Valley, California. He completed his undergraduate degree at UCLA in Integrative Biology and Physiology followed by obtaining his Masters degree at UCLA in Integrative Biology and Physiology. Dr. Cubberly then left Southern California to obtain his medical degree at the Medical College of Virginia. He couldn’t stay away from SoCal for long and returned to complete his residency training in Orthopaedic Surgery at the University of California, Irvine. Outside of work, Dr. Cubberly loves traveling with his wife Ashley, going to Disneyland, hanging out with friends and family, and staying active.
  • Andrew Hagar, M.D. – Dr. Hagar was born and raised in Denver, Colorado. He then completed his undergraduate studies at the University of Rochester in upstate New York on an academic scholarship. After college, Dr. Hagar returned home to Denver, where he attended the University of Colorado Medical School. He then moved to Boston, Massachusetts and completed his Orthopaedic Surgery residency at Tufts Medical Center. Outside of the hospital, Dr. Hagar enjoys building furniture, fly fishing and spending time with his wife, Catherine.

Sports Medicine:

  • Bailey Johnson, M.D. – Dr. Johnson grew up in Fort Collins, Colorado and completed her undergraduate studies at Colorado State University. After teaching English abroad in Spain, she attended medical school at the University of Colorado. From there she moved to Chicago, IL and completed her Orthopaedic Residency at Loyola University. She loves working with athletes and grew up playing competitive rugby for both the USA National Under-19s and for Colorado State University. In her free time, she loves traveling, movies, and hiking and exploring the outdoors with her new husband Andrew and their wonder dog Zoe.
  • Cory Smith, M.D. – Dr. Smith grew up in Dothan, Alabama in the Wiregrass region of the Southeast United States. He attended Samford University where he played football, and he then went on to attend medical school at the University of Alabama Birmingham. Dr. Smith then moved onto Greenville, South Carolina where he completed his Orthopaedic Residency at Prisma Health/USC Greenville. His training then moved him to Auckland, New Zealand where he has spent the past year training at UniSports Orthopaedics and Starship National Children's Hospital in Sports Medicine/Paediatric Sports Medicine and Paediatric Orthopaedics. During his time here he served as one of the team physicians for multiple professional and international rugby teams including the New Zealand All Blacks. During his free time, he enjoys golf, cooking barbecue, playing guitar, and spending time with his wife Maddie and his daughter Amelia.

Health Policy and Management:

  • Christopher Haddad, MBA – Chris Haddad grew up in Connecticut and received his undergraduate degree in biology from the University of Arizona. He holds two graduate degrees: an M.S. in Negotiation & Conflict Resolution from Columbia University and an Executive MBA in Healthcare Administration from the University of Colorado Denver. He and his wife Lauren are thrilled to return to Southern California after having spent the last eight years living in Denver with their two rescue dogs, Apple & Enza. Outside of work, you can find Chris on his road bike or in his rock climbing harness.

To learn more about Hoag Orthopedic Institute’s fellowship programs, visit