Office and Contact Information

1310 West Stewart Drive
Suite 508
Orange, CA 92868
phone: (714) 633-2111
fax: (714) 633-5615
map & directions

25982 Pala Drive
Suite 230
Mission Viejo, CA 92691
phone: (949) 600-8800
map & directions

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Physician Bio

Dr. Samuel Rosenfeld is a CHOC Children’s Orthopaedic Surgeon board-certified in Orthopaedic Surgery, specializing in Spina Bifida, Muscular Dystrophy, Scoliosis, Cerebral Palsy, Hydrocephalus, Spasticity, other pediatric neuromuscular diseases and rehabilitation. Dr. Rosenfeld is a national expert in pediatric neuromuscular diseases and is the Director of the Spina Bifida Clinic, Muscular Dystrophy Clinic and Spasticity Clinic at CHOC Children’s in Orange County, California, as well as the Director of the Spina Bifida Clinic at Rancho Los Amigos National Rehabilitation Center in Downey, California. Dr. Rosenfeld has been an active staff member at CHOC Children’s Orange County and CHOC Children’s at Mission, Mission Viejo, California for over 25 years. Dr. Rosenfeld is a Clinical Associate Professor in the Department of Orthopaedic Surgery, University of California, Irvine.

Dr. Rosenfeld received his medical degree from the Pennsylvania State University, College of Medicine. He completed an internship in general surgery at UC Irvine Medical Center in Irvine, California followed by a residency in Orthopaedic Surgery at UC Irvine Medical Center. Dr. Rosenfeld served his fellowship in Pediatric Orthopaedic Surgery and Rehabilitation at Rancho Los Amigos National Rehabilitation Center in Downey, California.

Dr. Rosenfeld has provided leadership expertise and has served as President of the Medical Staff at CHOC Children’s Orange County, as well as leadership roles in the Pediatric Orthopedic Society of North America, American Academy of Orthopaedic Surgeons, Spina Bifida Association, Muscular Dystrophy Association, and Clinical Faculty Department of Orthopedic Surgery, UC Irvine. Dr. Rosenfeld is affiliated with Adult & Pediatric Orthopaedic Specialists Medical Group, American Medical Association, Orange County Medical Association, California Medical Association, California Orthopaedic Association, American Academy of Orthopaedic Surgery, Western Orthopaedic Association, American Academy for Cerebral Palsy and Developmental Medicine, Society for Research into Hydrocephalus and Spina Bifida, American Orthopaedic Association and the Association of Children’s Prosthetic-Orthotic Clinics.

Dr. Rosenfeld has pioneered a new era with the use of the PRECISE “precise and gentle” remote control device, with minimal incision surgery, to perform limb lengthening, and was the first Orthopedic Surgeon on the west coast to perform the procedure. In addition to providing a less invasive procedure for limb lengthening, the device has been recognized for significantly reducing the potential for complications, such as infections, during the healing process. Presently, the device is used for lengthening the femur and tibia bones. Dr. Rosenfeld has been named a “Physician of Excellence” from the Orange County Medical Association multiple years running.

RESEARCH:

Rosenfeld S.R. and Nicholas G.G. Intracellular Erythrocyte Electrolytes in E. coli endotoxemia Clinical Research 23: 589A, 1975.

Rosenfeld S.R. and Anzel S.H. Use of the Hoffman Apparatus in Myocutaneous Pedicle Flap Journal of Trauma 21: 1045-1047, 1981.

Rosenfeld S.R. and Anzel S.H. Evaluation of the Pritchard, Total Elbow Arthroplasty Orthopaedics 5: 713-719, 1982.

Rosenfeld S.R. et al. congenital Syphilis Journal of Bone and Joint Surgery 65A: 115, 1983.

Brinker M.R. and Rosenfeld S.R. et al. Myelomeningocele at the sacral level: Long term outcomes in adults Journal of Bone and Joint Surgery 76-A: 1293-1300, September 1994.

Hunter, V et al: Ineffective hip rotation with Pavlik harness, prospective study of 35 infant dislocations, ACTA Orthop Scand 65(3): 243-245, 1994.

Rosenfeld S.R and Kaplan FS Progressive osseous Heteroplasia in male patients: Two new case reports, clinical orthopaedics, 317: 243-245, 1995.

Rosenfeld, S.R. Epitomes in Orthopaedics “Ilizarov Method” The Western Journal of Medicine, Volume 163 #6, December 1995, Page 568.

Nonweiler B, et al. Percutaneous In-situ fixation of slipped capital femoral epiphysis using two-threaded Steinmann Pins. Journal of Pediatric Orthopaedics 16: 56-60, 1996.

Kim J.Y. Rosenfeld S.R. and Keyak J.H. Increased prevalence of scoliosis in Turner’s syndrome, pediatrics, 104 (3): 18, 1999.

Koman L.A. Brashear, A Rosenfeld S.R. et al. Botulinum toxin type A neuromuscular blockade in the treatment of equinus foot deformity in cerebral palsy: A Multicenter Open Label Clinical Trial Pediatrics, 108 (5): 1062, 2001.

Kim J.Y. Rosenfeld S.R. Keyak J.H. Increased prevalence of scoliosis in Turner’s syndrome, Journal of Pediatric Orthopaedics 21: 765-766, 2001.

TEXTBOOKS:

Principles of Orthopaedic Practice. Editor-in-chief Roger Dee, M.D. Copyright 1988 by McGraw-Hill, Inc. Co-author chapter 29, Orthopaedic Management of Myelomeningocele.

Principles of Orthopaedic Practice. Editor-in-chief Roger Dee, M.D. Copyright 1997 by McGraw-Hill, Inc. Author of chapter 34, Orthopaedic Management in Myelomeningocele.

Decision Making in Spinal Care. Editor-in-chief D. Greg Anderson, M.D. and Alexander R. Vaccaro, M.D. Copyright 2007 by Thieme Medical Publishers, Inc. Author of chapter 39, Infantile Scoliosis.

NATIONAL MEETINGS:

Western Orthopaedic Association, October 23, 1980, evaluation of Pritchard Total Elbow Arthroplasty.

American Orthopaedic Association Residence Conference, April 1, 1989, Evaluation of the Pritchard Total Elbow Arthroplasty.

American Orthopaedic Association Residence Conference, April 29, 1982, Capital femoral necrosis as a complication of the medial approach to open reduction of the hip in congenital dislocation of the hip.

American Academy of Orthopaedic Surgeons, 60th Annual Meeting, February 18, 1993, sacral level myelomeningocele: A study of long-term outcomes in adult patients.

American Academy of Orthopaedic Surgeons, 61st Annual Meeting February 24, 1994 poster exhibit. Decreased in the prevalence of spinal fusion in spina bifida patients treated by spinal cord decompression.

Society for research into Hydrocephalus and Spina Bifida, 38th Scientific Meeting, June 22, 1994. Decrease in the prevalence of spinal fusion in spina bifida patients treated by spinal cord decompression.

Society for research into Hydrocephalus and Spina Bifida 38th Scientific Meeting, June 22, 1994, poster exhibit. Postoperative fractures in spina bifida: The effects of Calcitrol on fracture frequency.

Society for research into hydrocephalus and spina bifida, 38th Scientific Meeting, June 22, 1994, poster exhibit. A long term follow-up of outcomes in adult patients with sacral level spina bifida.

Pediatric Orthopaedic Society of North America, 1995 Annual Meeting, May 3, 1995. Use of Botulinum toxin to prevent complications during limb lengthening.

American Academy for cerebral palsy and Developmental Medicine, 49th Annual Meeting, September 28, 1995. Botulinum toxin type A in the treatment of lower limb spasticity associated with cerebral palsy.

64th Annual Meeting, American Academy of Orthopaedic Surgeons, San Francisco, February 13 to 17, 1997. Effects of Botulinum toxin on skeletal muscle during limb lengthening.

Children’s Hospital Orange County, Grand Round, February 5, 1997, spina bifida: A team approach.

Children’s Hospital Orange County, Grand Round, February 26, 1997, pathophysiology and treatment of spasticity of cerebral origin.

CHOC first Annual Pediatric Rehabilitation Conference, October 5, 1996. Update on spasticity management using Botulinum toxin injection.

AAOS/NAON Coordinator of Symposium. Use of outcome studies, February 4, 1999, Anaheim, California.

AAOS/NAON Coordinator of Symposium, upper extremity disorders and injuries in the adult, February 5, 1999, Anaheim, California.

AAOS/NAON Coordinator of Symposium, Spasticity Management, current concepts and treatment methods, surgical management of spasticity, February 6, 1999, Anaheim, California.

21st Annual Graduate Research Forum, Department of Orthopaedic Surgery, University of California, Irvine College of Medicine May 13, 1999. Increased prevalence of scoliosis in Turner’s syndrome.

Glaneo Pre-Posna Symposium, May 15, 1999, Orlando, Florida, roundtable on Myelomeningocele “the adult with myelomeningocele”.

American Academy of Pediatrics Annual Meeting, Washington, D.C., October 9, 1999, increased prevalence of scoliosis in Turner’s syndrome.

Pediatric Orthopaedic Society of North America. 2000 Annual Meeting, May 1 to May 4, 2000, poster exhibit, "The Anterolateral 'Z': An Extensile, Cosmetically Superior Approach for Major Hip Reconstruction"

University of California, Irvine College of Medicine, 22nd Annual Graduate Research Forum, June 9, 2000. “Non-instrumented kyphectomy in spina bifida patients”.

University of California, Irvine College of Medicine, 23rd Annual Graduate Research Forum, June 8, 2001. Preliminary results of primary total hip arthroplasty in patients with inflammatory arthritis under 21 years of age.

University of California, Irvine College of Medicine, 24th Annual Graduate Research Forum, May 31, 2002. Proximal femoral valgus rotation osteotomy for adolescent degenerative osteoarthritis.

Pediatric Orthopaedic Society, North America, 2004 Annual Meeting, May 12 to May 15, 2005, poster exhibit. Wrist arthrodesis in patients with neuromuscular disease.

American Orthopaedic Association, 117th Annual Meeting, June 23 to June 26, 2004, poster exhibit. Wrist arthrodesis in patients with neuromuscular disease.

American Orthopaedic Association, 117th Annual Meeting, June 23 to June 26, 2004, poster exhibit. Differential lengthening of the radius and ulna in patients with multiple hereditary exostoses.

American Orthopaedic Association, 119th Annual Meeting, June 21 to June 24, 2006, participation in symposium, musculoskeletal uses of Botulinum toxins.

University of California, Irvine School of Medicine: Transitional Care for Individuals with Developmental Disabilities, March 22 to March 24, 2007, "Treatment of Cerebral Palsy and Other Orthopaedic Disorders."

Orthopaedic Rehabilitation Association 18th Annual Meeting, September 28 and 29, 2007, “Neuromuscular Scoliosis.” Los Angeles, Ca.

2008 National Juvenile Arthritis Conference AJAO, Costa Mesa, Ca., July 12, 2008: “Joint Replacement in Adolescents with Juvenile Rheumatoid Arthritis”

American Academy of Orthopaedic Surgeons 2010 Annual Meeting Specialty Day Orthopaedic Rehabilitation Association “Spasticity Management” March 13, 2010.

Association of Children’s Prosthetic-Orthotic Clinics 2010 Annual Meeting, Clearwater Beach, Florida, June 4, 2010, “Symposium: Spina Bifida, the Orthopaedic Perspective.”

CHOC Children’s “Care Recommendations for Children with Duchenne Muscular Dystrophy” Orthopaedic Management March 12, 2011.

Association of Children’s Prosthetic-Orthotic Clinics 2011 Annual Meeting, Park City, Utah, April 2, 2011, “Symposium: Neuromuscular Disorders in Children: Interdisciplinary Management.”

Spina Bifida Association 38th SBA National Conference, Anaheim, California, June 26, 2011, “Orthopaedic Needs and Mobility Issues in Spina Bifida.”

Spina Bifida Association 38th SBA National Conference, Anaheim, California, June 28, 2011, “Maximizing Ambulatory Potential in Spina Bifida.”

Spina Bifida Association 38th SBA National Conference, Anaheim, California, June 28, 2011, “Ask the Doctor: Orthopaedics.”

Becker Muscular Dystrophy Conference, Los Angeles, California, August 13, 2011, “Interactive Panel with MDA Directors and Clinicians: Real Life Q and A.”

CHOC Children’s “Orthopaedics for the School Nurse Conference,” September 16, 2011, “Ortho Special Needs: Muscular Dystrophy, Spina Bifida, Spasticity Management.”

5th International Congress on Early Onset Scoliosis and Growing Spine (ICEOS), Orlando, Florida, November 18-19, 2011, “Growing Segmental Spinal Instrumentation without Fusion in Spinal Muscular Atrophy.”

Second World Congress on Spina Bifida Research and Care, March 13, 2012, “Point-counterpoint Hip and Mobility,” Las Vegas, Nevada.

ACADEMIC AFFILIATIONS:

University of California, Irvine, Associate Clinical Professor, Department of Orthopaedic Surgery.

Director, Spina Bifida Clinic, Rancho Los Amigos, National Rehabilitation Center.

Director, Spina Bifida Clinic, CHOC Children’s Hospital Orange County.

Director, Muscular Dystrophy Association Clinic, CHOC Childrens Hospital Orange County.

Director, Spasticity Clinic, CHOC Children’s Hospital Orange County

Orthopaedic Surgery Consultant, HealthBridge Children’s Hospital

HOSPITAL STAFF MEMBERSHIPS:

CHOC Children's Hospital, Orange, California

St. Joseph Hospital Orange, California

CHOC Children's Hospital at Mission, Mission Viejo, California

University of California, Irvine Medical Center, Orange, California

Rancho Los Amigos National Rehabilitation Center, Downey California

HealthBridge Children’s Hospital, Orange,California

LEADERSHIP ACHIEVEMENTS:

Chairman, Department of Orthopaedic Surgery, St. Joseph Hospital, Orange, California, January 1, 1992 to December 31, 1993.

Member American Academy of Orthopaedic Surgeons Committee on Nursing and Allied Health Professions, 1996-2002, Chairman of the Committee 2000-2002.

Member of the Board of Directors, California Orthopaedic Association 1996-2002.

Vice President, Western Orthopaedic Association, Orange County, chapter 1996.

President, Elect Western Orthopaedic Association, Orange County, chapter 1997.

President, Western Orthopaedic Association, Orange County, chapter 1998.

Member, American Academy of Orthopaedic Surgeons, Annual Meeting committee 2001, 2002 and 2003.

Muscular Dystrophy Association, Orange County, Chapter Executive Committee 2001 to present.

Secretary Treasurer of the Medical Staff, CHOC Children’s Hospital Orange County 2001 and 2002.

President Elect Medical Staff, CHOC Children’s Hospital Orange County, 2003 and 2004.

President of the Medical Staff, CHOC Children’s Hospital Orange County, 2005 and 2006.

Board of Counselors, American Academy of Orthopaedic Surgery, 2002 to 2008.

Chairman, Medical Staff Performance Committee, CHOC Childrens Hospital, 2006 to 2010.

Member, Practice Management Committee, Pediatric Orthopaedic Society of North America 2010, 2011

Orthopaedic Research and Education Foundation, State Campaign Chair, 2008 to present.

Professional Advisory Committee, Spina Bifida Association, 2011 to present.

ACADEMIC INSTITUTIONAL HONORS:

Department of Orthopaedic Surgery, University of California at Irvine College of Medicine, Affiliate Faculty Teaching Awards 1998, 2001 and 2002.

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