CERTIFICATION AND LICENSURE: Board Certified, American Board of Orthopaedic Surgery, 2004 California license A75341

AFFILIATIONS: Fellow of the American Academy of Orthopaedic Surgeons Member of the American Association of Hip and Knee Surgeons Western Orthopaedic Association California Orthopaedic Association

EDUCATION: Fellowship in Total Joint Reconstruction, 2001-2002 Anderson Orthopaedic Research Institute Alexandria, Virginia Residency in Orthopaedic Surgery, 1997-2001 St. Luke’s/Roosevelt Hospital Center Columbia University College of Physicians and Surgeons New York, New York Internship in General Surgery, 1996-1997 St. Luke’s/Roosevelt Hospital Center Columbia University College of Physicians and Surgeons New York, New York M.D., Washington University School of Medicine, 1992-1996 St. Louis, Missouri B.S.E., Johns Hopkins University, 1989-1992 Baltimore, Maryland Biomedical Engineering/Mechanical Engineering Tau Beta Pi National Engineering Honor Society General and Departmental Honors University of Maryland, 1988-1989 College Park, Maryland

EMPLOYMENT: Adelberg Associates Medical Group 2024 – present Consultant, 2012-present Comanagement of Orthopaedic Service Line at Alta Bates-Summit Medical Center Chair of the Hip and Knee Workgroup Orthopaedic Lead of Performance Improvement Team Committee Member of the Executive Committee East Bay Orthopaedic Management Associates, LLC Oakland, California Private Practice, 2004-present Orthopaedic Surgeon Pacific Bone and Joint Clinic, Berkeley, California Private Practice, 2002-2004 Orthopaedic Surgeon Berkeley Orthopaedic Medical Group Berkeley, California

RESEARCH: Second-Generation porous-coated cementless total hip arthroplasties have high survival. Chen CJ, Xenos JS, McAuley JP, Young A, Engh CA Sr Published in Clin Orthop Relat Res. 2006 Oct;451:121-7 Second-Generation Uncemented Total Hip Arthroplasty: Minimum Five-Year Results with a Fully Porous-Coated Stem and a Hemispheric Porous-Coated Cup Chen CJ, Xenos J, McAuley J, Young A, Engh CA Sr Anderson Orthopaedic Research Institute Accepted for poster presentation at AAHKS Annual Meeting, Dallas, TX, 2002 Treatment of low back pain in professional dancers with spondylolysis or spondylolisthesis Chen CJ, Frazier D, Department of Orthopaedic Surgery St. Luke’s/Roosevelt Hospital Center, 2000 Imaging Rounds: A 73-Year Old Woman With a Right Leg Mass Metastatic malignant melanoma masquerading as hematoma Chen CJ, Merkel K, Hsieh P, Reinus W, Gilula L Department of Orthopaedic Surgery Washington University School of Medicine Published in American Journal of Orthopedics, March 1996 Biomechanical properties of bone cement Chen CJ, Merkel K, Department of Orthopaedic Surgery Washington University School of Medicine, 1995 Effects of muscle action on knee joint moments during cane-assisted walking Chen CJ, Vargo M, Dept of Rehabilitation Medicine and Biomechanics Laboratory Clinical Center, National Institutes of Health, 1993 Determination of three dimensional structure of proteins using X-ray crystallography Craig Hyde, Ph.D., Laboratory of Structural Biology NIAMS, National Institutes of Health, 1992 Determination of molecular mechanisms controlling oocyte-specific gene expression Jurrien Dean, M.D., Ph.D., Laboratory of Cellular and Developmental Biology NIDDK, National Institutes of Health, 1990 and 1991

ACTIVITIES: Surgical Peer Review Committee, Alta Bates Hospital, 2009-2018 Journal of Bone and Joint Surgery, Consultant Reviewer 2004-2007 St. Luke’s/Roosevelt Hospital Medical Records Committee, 2000-2001 St. Luke’s/Roosevelt Hospital Housestaff Committee, 1999-2001