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Previous Fellows
2013-2014 Fellow

Geoffrey Cornelsen, DO
Dr. Geoffrey Cornelsen hails from Rigby, Idaho. He received a bachelors degree in Biology in 2000 from Idaho State University in Pocatello, Idaho. He attended Des Moines University, College of Osteopathic Medicine and Surgery and graduated with honors in 2008. He completed his orthopedic surgery residency at Millcreek Hospital in Erie, Pennsylvania where he concurrently completed a masters program in medical education. While there, he worked with the Erie Otters, OHL hockey team; and Erie BayHawks, NBA D-League; and Meadville High School football. His interests include hiking, rock climbing, and golf. Dr. Cornelsen and his wife April have four daughters.
Dr. Cornelsen has joined Kingman Regional Medical Center in Kingman, Arizona with a focus on sports medicine and general orthopedics.


2012-2013 Fellow

David Rust, MD

Dr. David Rust grew up in Sandpoint, Idaho. He received his undergraduate degree in chemistry in 2002 at the University of Utah in Salt Lake City and worked as a lab technician in the Department of Human Genetics. He graduated from Creighton University School of Medicine, Omaha, Nebraska in 2007 where he co-founded the Magis Clinic, a free medical clinic for the homeless and uninsured. He completed his orthopedic surgery residency at the University of New Mexico in Albuquerque, New Mexico and worked with the University of New Mexico Lobo athletics programs, Sandia Prep High School football, and the New Mexico Mustangs hockey.
Dr. Rust has joined St. Luke's Hospital in Duluth, Minnesota and is developing a general and sports orthopedic practice.


2011-2012 Fellow

Shelley Oliver, MD
Dr. Shelley Oliver graduated from Wheaton College, Wheaton, Illinois in 2001 with degrees in chemistry and political science. After completing a year of laboratory research at Argonne National Lab, she went on to attend medical school at Southern Illinois University, Carbondale, Illinois,  completing her medical degree in 2006. She completed her residency in Orthopaedic Surgery in Grand Rapids, Michigan (GRMEP/MSU) in 2011.
Dr. Oliver is actively engaged in her growing practice at Northern Colorado Orthopedic Associates in Fort Collins, Colorado.
2010-2011 Fellows

Charles Popkin, MD
Dr. Charles Popkin earned his bachelor of arts degree in economics from Colgate University in 2000 where he graduated Cum Laude. He then completed his medical degree in 2005 from Tulane University in New Orleans, Louisiana. His residency was completed at the University of Miami/Jackson Memorial Hospital where he was administrative chief resident. Dr. Popkin provided physician coverage for the University of Miami football, baseball and women's soccer teams. He also served as team physician for Chaminade Madonna High School in Ft. Lauderdale, Florida. He is published in the American Journal of Sports Medicine, Sports Health, Orthopedics, Journal of Trauma and the American Journal of Public Health.
Dr. Popkin completed a second fellowship in pediatric orthopedics with the University of Toronto, Canada (SICKkids) and now has a pediatric sports medicine practice at Columbia Hospital in New York, New York where he also serves as faculty.

Joseph McCormick, MD
Dr. Joseph McCormick grew up in Green Bay, Wisconsin. He attended the University of Wisconsin and graduated with bachelor of science degree in biology in 2001. He went on to attend medical school at the Medical College of Wisconsin in Milwaukee, graduating in 2005. After finishing medical school, he completed his orthopaedic surgery training in 2010 at Medical College of Wisconsin Affiliated Hospitals in Milwaukee.
Dr. McCormick is practicing orthopedics with the Affinity Medical Group in Appleton, Wisconsin.

2009-2010 Fellows

David Brcka, MD
David Brcka, MD, attended Iowa State University and graduated with a bachelor of science degree in biology in 1999. While there, he played football for the NCAA Division I Cyclones. He went on to attend medical school at the University of Iowa, Carver College of Medicine graduating in 2004. After finishing medical school, he completed his orthopaedic surgery residency training in 2009 at Orlando Regional Healthcare in Florida.
Dr. Brcka practices orthopedics at the Sports Medicine Institute in Clermont, Florida.

Casey Johnston, MD
Casey Johnston attended the University of Nebraska, Lincoln and graduated from the University of Nebraska Medical center with a B.S. in Radiation Science Technology with high distinction in 1999. He went on to attend medical school at the University of Nebraska Medical Center graduating in 2004. After finishing medical school, he completed his orthopaedic surgery residency training in 2009 at Creighton University/University of Nebraska Medical Center.
Dr. Johnston practices orthopedics at Glacial Lakes Orthopedics in Watertown, South Dakota.

2008-2009 Fellows

Ronald Tabaddor, MD
Orthopaedic surgeon Ronald Tabaddor, earned his medical degree in 2001 from Boston University School of Medicine, Boston, Massa chusetts., and a bachelor of arts in English, Cum Laude, from Boston University in 1996. He completed his orthopedic residency at the Harvard Combined Orthopaedic Residency Program where he was chief administrative resident. Dr. Tabaddor also completed a neurological surgery residency at Brigham & Women's Hospital/Children's Hospital/Harvard Medical School and a general surgery internship at Brigham & Women's Hospital/Harvard Medical School. He has provided physician coverage for the Boston Ballet , USA Indoor Track and Field National Championships and Bay State Games in Boston and has run the Boston Marathon several years as well as participated in triathlons.
Dr. Tabaddor sustains a busy sports orthopedic practice at South County Orthopedics in Wakefield, Rhode Island.

Corey Wulf, MD
Orthopaedic surgeon Corey Wulf completed his medical degree at the University of South Dakota in Vermillion, South Dakota, graduating Summa Cum Laude in 2003. He graduated from South Dakota State University in Brookings with high honors in 1998 earning a bachelor of science degree with a major in biology and a minor in microbiology. Dr. Wulf completed his residency at the Mayo Graduate School of Medicine, Department of Orthopaedic Surgery in Rochester, Minnesota. He has presented at the American Society of Surgery on Hand and the American Society of Bone and Mineral Research.
Dr. Wulf has returned to the Twin Cities and is a partner with his former fellowship faculty at Twin Cities Orthopedics.

2007-2008 Fellows

Christie Heikes, MD
Orthopaedic surgeon Christie Heikes earned her medical degree at the University of Minnesota in 2002. She completed her residency at the same in the Department of Orthopaedic Surgery and an internship the year prior in the Department of General Surgery. Prior to completing her medical degree, Dr. Heikes earned a bachelor of Individualized Studies in Medical Ethics also at the University of Minnesota. Dr. Heikes is a former member of USA Track and Field and varsity letter winner and captain of the University of Minnesota Cross Country and Track and Field teams.
Dr. Heikes practices orthopedics at Twin Cities Orthopedics.

Mehul Taylor, MD
Orthopaedic surgeon Mehul Taylor completed his medical degree at the Chicago Medical School, North Chicago, Illinois, in 2002, and his residency at the Baylor College of Medicine, Department of Orthopaedic Surgery in Houston, Texas. He completed a Master of Science in Applied Physiology and a bachelor of science degree in Physiological Sciences at the University of California, Los Angeles, where he was a member of the Golden Key Honor Society, Dean's List, and Undergraduate Honors Program.
Dr. Taylor practices orthopedics at Valley Orthopedic Institute in Lancaster, California

2006-2007 Fellows

Mark Dietrich, MD, JD
Orthopaedic surgeon Mark Dietrich earned his medical degree at the University of Nebraska College of Medicine, Omaha, in 2001, and completed his residency at the University of Nebraska Medical Center/Creighton University Orthopaedic Surgery Residency Program, also in Omaha. Prior to completing his medical degree, Dr. Dietrich earned his juris doctorate at the University of Nebraska College of Law, Lincoln, and his bachelor of arts in Quantitative Economics at Stanford University, Standford, California. At Stanford, he was a competitive swimmer. His work experience includes serving as an attorney and investment banker.
Dr. Dietrich returned to his alma mater at the University of Nebraska Medical Center/Creighton University Orthopaedic Surgery Residency Program and currently serves as an assistant professor.

Christopher Ellingson, MD
Orthopaedic surgeon Christopher Ellingson completed his medical degree at the Washington School of Medicine in St. Louis, Missouri in 1998, and his residency at the Bone and Joint Sports Medicine Institute, Naval Medical Center Portmouth, in Portsmouth, Virginia. He completed his bachelor of arts degree in Biology with a minor in Chemistry at Augustana College, Sioux Falls, South Dakota. He is a Lieutenant Commander in the Navy and his work experience includes serving in Marine Attack Training Squadron 203, Second Marine Aircraft Wing, as a Naval Flight Surgeon.
Dr. Ellingson practices orthopedics at the Bone & Joint/Sports Medicine Institute, Naval Medical Center Portsmouth in Virginia.

2005-2006 Fellows

Greg Folsom, MD
Orthopaedic surgeon Greg Folsom, MD, earned a bachelors of science degree in chemical engineering with honors from Georgia Tech. He completed his medical degree at the University of Alabama School of Medicine in Birmingham and his orthopedic surgery residency the University of Alabama at Birmingham, where he also provided medical coverage for high school and collegiate athletes. His special medical interests in sports medicine include arthroscopic shoulder and knee reconstruction and prevention and treatment of skiing injuries.
Dr. Folsom practices at Ortho KC in Kansas City, Kansas.

Michael Marger, MD, MPH
Orthopaedic surgeon Michael Marger, MD, MPH, earned his bachelors of science at the University of California, San Diego in animal physiology and neuroscience, and a masters in public health in epidemiology at the UCLA School of Public Health in Los Angeles, Calif. He completed his medical degree at the Sackler School of Medicine, New York State American Program in 2000 and his orthopedic surgery residency at the SUNY Buffalo School of Medicine and Biomedical Sciences in 2004. He has additional experience in clinical outcomes research from the West Los Angeles VA Medical Center affiliated with the UCLA School of Medicine. His special medical interests in sports medicine include advanced techniques in shoulder and knee reconstruction, with an emphasis in outcomes research of the shoulder and prevention of injuries in the throwing athlete.
Dr. Marger currently practices at the Garey Orthopedic Medical Group in Pomona, California.

2004-2005 Fellows

Jody Jachna, MD

Dr. Jachna earned his medical degree at Northwestern University Medical School in 1999 and completed a general surgery internship in 2000 at the University of Kansas Medical Center, where he earned the Top Doc Award in 2000 and 2001. He completed an orthopaedic surgery residency at the University of Kansas Medical Center in 2004. Dr. Jachna’s wide-ranging work experience includes serving as Rehabilitation Director for First American Health Care and as a certified athletic trainer at the University of Illinois in Chicago. His special medical interests include endurance athletes and shoulder injuries.
Dr. Jachna practices orthopedics at Northland Mid-America Orthopedics in the St. Louis, MO area.

Jennifer Swaringen, MD
Dr. Swaringen completed her medical degree at Emory University in Atlanta, Georgia, in 1999 and a general surgery internship at the University of Michigan Medical Center in Ann Arbor, Mich., in 2000. She completed her orthopedic surgery residency at University of Michigan Medical Center in 2004.
Dr. Swaringen’s work experience includes serving as a research assistant at the Emory Sports Medicine Clinic in Atlanta and sports medicine research at the University of Michigan. She also has provided medical coverage for high school and collegiate sporting events. Her special medical interests include sports-related injuries and knee and shoulder arthroscopy.
Dr. Swaringen practices at Orthopaedic Associates of West Florida in Trinity, FL.