Western Orthopaedics - Our Physician Assistants

Skip To Content

Office Appointments: 303-321-1333 - Physical Therapy: 303-253-7373

Allied Health Professionals

At Western Orthopaedics, some of our surgeons utilize Physician Assistants or PA’s, as part of their team.  Our PA’s are well trained and work closely with our surgeons to ensure that you are provided with the highest level of care and compassion.  Their role is to extend the reach and service of our surgeons.  They are utilized to improve access to our care so that we can more efficiently help you receive the treatment that you need for your problem.  To learn more about our PA’s please read below.

  • Greg S. Turner, PA-C

    Curriculum Vitae (pdf)
    Greg was born and raised in Denver, Colorado.  He received a B.S. from Colorado State University in biological sciences with an emphasis in human anatomy.  He attended a surgical physician assistant school in Cleveland, Ohio. Greg began his physician assistant career in 1994 at Western Orthopaedics.  He has worked with our surgeons to assist them with over7,000 operative procedures and sees patients in the clinic for evaluation and treatment.  Greg has served as a preceptor for the physician assistant programs at both the University of Colorado Denver and Red Rocks Community College.  He is a member of the American Academy of Physician Assistants and the Colorado Academy of Physician Assistants.


  • Andrew T. Cleveland, PA-C, MSPAS, MPH

    Andrew was born and raised in Denver, Colorado. He practiced medicine through high school as a junior ski patroller at Winter Park Ski Resort. After graduating with a BA from Northwestern University, he returned to Colorado, where he spent one year as a professional ski patroller at Winter Park, then three years as an EMT at an Urgent Care center in Aurora. He graduated from Touro University, California, with a master’s of science in physician assistant studies and a master’s in public health, in 2007. Andrew worked with Dr. Traina at his former office and was excited to join Dr. Traina in 2009 at Western Orthopaedics. Andrew has served as a preceptor to several PA students from different programs including Red Rocks Community College and CU Health Sciences. He is a member of the American Academy of Physician Assistants and Physician Assistants in Orthopaedic Surgery. 

  • Shawn B. Karns, MPA, PA-C

    Curriculum Vitae (pdf)
    Shawn is a California native, born and raised in the San Francisco Bay Area.  He made his way out to Colorado for College at CU Boulder, and graduated with a B.A. degree. After college, Shawn developed and guided cycling trips throughout the U.S. and Italy and also worked as a ski patroller in Vail, Colorado during the winter months.  It was during his time, as a ski patroller and EMT, Shawn decided to commit himself to a career in medicine.  He completed his Masters Physician Assistant degree at Samuel Merritt University in Oakland, California in 2008.  Prior to joining the team at Western Orthopaedics, Shawn worked for 3 ½ years in a large orthopaedic surgery practice in Northern California.  He is excited to be back in Colorado and to be a part of the Western Orthopaedic group and Dr. White’s team.  In his spare time, Shawn enjoys the outdoors and is an avid skier and cyclist.  He also enjoys spending time with family, traveling, attempting new languages, and photography.  Shawn is a member of the American Academy of Physician Assistants and the Colorado Academy of Physician Assistants.

  • Rose G. Christensen, MSPAS, PA-C

    Curriculum Vitae (pdf)
    Rose is originally from Michigan but moved to California where she lived for several years obtaining her undergraduate, graduate, and postgraduate degrees. She received high honors from Pepperdine University with a B.S. in Sports-Medicine/Pre-Med. While at Pepperdine and shortly after, she participated in various research projects under her professors and worked in local Orthopaedic practices, such as Santa Monica Orthopedics and Sports Medicine group and Orthopaedic Specialists of North County San Diego, gaining invaluable experience. She then went on to obtain a masters degree in Physician Assistant Studies from Western University of Health Sciences in Pomona California ranking in the top ten of her class. Directly following, she participated in a Physician Assistant Orthopaedic residency program through Arrowhead Orthopaedics in Redlands, California. Rose came to Denver and joined the Western Orthopaedics team under Dr. Armodios Hatzidakis in the fall of 2012.  She is an active member of the American Academy of Physician Assistants and Colorado Academy of Physician Assistants.


  • Renee Charest PA-C, MSPAS

    Curriculum Vitae (pdf)
    Originally from New England, Renee was born and raised in southern New Hampshire. She subsequently attended The University of New Hampshire where she graduated Cum Laude with her Bachelor’s Degree in Nutritional Sciences in 2013. She immediately moved to New York City where she attended Touro College Manhattan’s Physician Assistant Program, graduating with a Bachelor of Health Sciences and Masters of Physician Assistant Studies in 2016. Renee then moved to Denver and worked in facial plastic surgery for a short while. She joined Western Orthopaedics in Spring of 2017, as part of Dr. Hatzidakis’ team working in both the clinical and research settings. A previous competitive swimmer, Renee enjoys skiing, cycling, and hiking with her dog in her spare time. She is an active member of the Colorado Academy of Physician Assistants and the American Academy of Physician Assistants.


  • Paul C. Birge, PA-C, MS

    Curriculum Vitae (pdf)
    Paul proudly joins the Western Orthopaedics team under Dr. Armodios Hatzidakis in the spring of 2018.  A native of the Rocky Mountain west, Paul left Colorado for 19 years, returning in 2011, to work in the Emergency Department at Penrose Hospital in Colorado Springs.  Prior to that, he worked in Taos, New Mexico, including with Taos Orthopaedic Institute.  After earning his undergraduate degree in Exercise and Sport Science at Colorado State University, he began his career in health care as an EMT at the University of California Los Angeles, in 1992.  After that, he completed his physician assistant training at the Yale University School of Medicine Physician Associate Program in 1997.  He then attended the University of Texas at Tyler, earning a Master of Science in Kinesiology in 1999.  His research interests included bone health and the physiology of altitude.  He enjoys coaching baseball, fly fishing, skiing, and traveling with his family.


Related Links

What is a PA-C?

The initials "PA-C" stand for Physician Assistant-Certified. To be certified, they must complete 100 hours of Continuing Education (CEU) courses every two years and take a re-certification exam every six years.

Our Team

consists of Certified Physician Assistants, and X-ray Technologists.  All of our professionals participate in annual continuing medical education related to current concepts of orthopedics and rehabilitation.  Our top priority is taking care of you! We are a team you can trust.