Dr. Christopher M. Happ

Dr. Khazzam is a board-certified orthopedic surgeon who joined Baylor Scott & White Health following 14 years in practice at University of Texas Southwestern Medical Center, where he served as the chief of shoulder surgery.Dr. Khazzam specializes in evaluating and treating atraumatic and traumatic shoulder injuries. He specializes in reparative and complex shoulder reconstruction surgery. Dr. Khazzam uses his advanced orthopedics training to provide highly individualized care for patients of all ages and activity levels, from amateur athletes to seasoned pros and beyond. His expertise includes the latest surgical and nonsurgical advancements to alleviate pain and restore function, offering innovative arthroscopic surgery as well as open surgical management procedures, depending on the demands of the disorder. He is uniquely adept at performing revision shoulder surgery, total shoulder replacements, and reverse total shoulder replacements—which are complex surgeries needed for only the severest injuries. Dr. Khazzam is very active in clinical and basic science research, with a primary interest in outcomes-based research and evidence-based medicine. He has published numerous peer-reviewed journal articles and textbook chapters. Dr. Khazzam has been named a Texas Super Doctor for 2021, 2022, 2023, 2024 and 2025 by Texas Monthly. Dr. Khazzam is an active member of American Shoulder and Elbow Surgeons. There he holds the distinction of a Neer Circle Fellow which is an honor given to members who have demonstrated significant contributions to the field of shoulder and elbow surgery. Dr. Khazzam is very active in research and has published numerous peer-reviewed journal articles and textbook chapters Arthroscopic Rotator Cuff (“ARC) study : randomized clinical trial comparing operative and non-operative treatment for rotator cuff tears that develop over time. This study aims to find out which treatment works better and for whom, in order to help patients in the future select the best treatment for them. Degenerative rotator-cuff disorders Current concepts review: revision rotator cuff repair Risk factors associated with degenerative glenohumeral osteoarthritis Obesity is associated with muscle atrophy in rotator cuff tear Risk factor prediction and categorization for glenohumeral osteoarthritis: A classification and regression tree analysis Low success rate of closed reductions when treating dislocations after reverse shoulder arthroplasty Magnetic resonance imaging identification of rotator cuff retears after repair: interobserver and intraobserver agreement Management of glenohumeral joint osteoarthritis evidence-based clinical practice guideline Click here to read more of Dr. Khazzam’s research publications. Dr. Khazzam is highly rated in 10 conditions, according to our data. His clinical expertise encompasses Tendinitis, Osteoarthritis, Frozen Shoulder, Osteonecrosis, and Endoscopy. Dr. Khazzam is board certified in Orthopaedic Surgery- American Board Of Orthopaedic Surgery. Dr. Khazzam is currently accepting new patients.

Lawson Copley is an Orthopedics provider practicing medicine in Dallas, Texas. Dr. Copley is highly rated in 4 conditions, according to our data. His clinical expertise encompasses Infectious Arthritis, Pyomyositis, Septic Arthritis, and Toxic Synovitis. Dr. Copley is board certified in Orthopaedic Surgery- American Board Of Orthopaedic Surgery. Dr. Copley is currently accepting new patients.

Nathan Lesley is an Orthopedics provider practicing medicine in Comanche, Texas. Dr. Lesley is highly rated in 15 conditions, according to our data. His clinical expertise encompasses Trigger Thumb, Rhizarthrosis, Carpal Tunnel Syndrome, and Ganglion Cyst. Dr. Lesley is board certified in Surgery Of The Hand- American Board Of Orthopaedic Surgery/Surgery Of The Hand, Surgery Of The Hand- American Board Of Orthopaedic Surgery, and Orthopaedic Surgery- American Board Of Orthopaedic Surgery. Dr. Lesley is currently accepting new patients.