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Nader Nassif, MD

Procedures & Conditions Treated:


  • Advanced Joint Reconstruction
  • Anterior Total Hip Replacement
  • Arthritis Management
  • Corticosteroids / Cortisone Shots
  • Dorsal Approach Total Hip Replacement
  • Hip Implants
  • Hip Revision Surgery
  • Joint Replacement Surgery
  • Minimally Invasive Hip Surgery
  • Partial Hip Replacement
  • Partial Knee Replacement
  • Total Hip Replacement
  • Total Knee Replacement
  • Total Knee Revision
  • Viscosupplementation for Osteoarthritis


  • Bone Cyst
  • Bone Tumor
  • Degenerative Joint Disease
  • Hip Arthritis
  • Hip Pain
  • Joint Pain
  • Knee Arthritis
  • Knee Pain
  • Osteoarthritis
  • Osteonecrosis / Avascular Necrosis
  • Total Knee Replacement
  • Total Knee Revision
  • Viscosupplementation for Osteoarthritis


Dr. Nassif grew up in Southern California and attended the University of California, Irvine where he received his Bachelor’s degrees in biology and physics. He earned his Medical Degree from Harvard Medical School where he graduated with Honors. Dr. Nassif then went on to complete his residency training at Washington University in Saint Louis, Missouri.

Following residency, he continued his training at the Hospital for Special Surgery in New York City, where he focused on hip and knee replacement surgery and adult joint reconstruction. Finally, Dr. Nassif went on to Memorial Sloan Kettering Cancer Center where he received additional training in advanced joint reconstructive surgery, limb salvage surgery and the care of benign and malignant tumors of the soft tissue and bone.

Dr. Nassif has been active in research and the advancement of joint replacement and reconstruction surgery. He has authored multiple book chapters, numerous research articles in peer-reviewed publications. He has also presented in many regional, national and international orthopedic meetings focused on the advancement of Hip and Knee Replacement Surgery. Dr. Nassif was named the Division Chief of Joint Replacement for Hoag Orthopedic Institute at Hoag Orthopedic Institute in 2021.

Dr. Nassif lives in Irvine with his family. In his leisure time, he enjoys spending time with his family, playing tennis, water sports and long-distance running. He has completed 3 marathons, multiple half marathons and has recently acquired an interest in cycling.

Dr. Nassif is assisted by Marcella Northern, NP

  • Medical School
  • Harvard Medical School (Medical Doctor)
  • Internship
  • Washington University School of Medicine, Barnes-Jewish Hospital (Orthopedic Surgery)
  • Residency
  • Washington University School of Medicine, Barnes-Jewish Hospital (Orthopedic Surgery)
  • Fellowship
  • Hospital for Special Surgery (Adult Joint Reconstruction)
  • Memorial Sloan Kettering Cancer Center (Musculoskeletal Oncology)
Board Certification
  • American Board of Orthopedic Surgeons (ABOS)
  • American Academy of Orthopaedic Surgeons
  • American Association of Hip and Knee Surgeons
  • Arthritis Foundation Medical Honoree, Orange County Chapter (2018)
  • AAOS/ORS/OREF Clinician Scientist Development Program (2012)
  • Adult Reconstruction and Joint Replacement Clinical Service Award (2012)
  • Current Concepts for Joint Replacement traveling scholarship (2010)
  • Medical Doctorate, Cum Laude, Harvard Medical School (2006)
  • B.S. in Physics with Biomedical Physics concentration, Magna Cum Laude, UCI (2002)
  • B.S. in Biological Sciences, Magna Cum Laude, UCI (2002)
  • Phi Beta Kappa National Honor Society
  • Sigma Phi Sigma, Physics Honor Society
  • Sigma Xi, Research Honor Society
Affiliated Locations
  • Hoag Hospital - Irvine
  • Hoag Memorial Hospital Presbyterian - Newport Beach
  • Hoag Orthopedic Institute
  • Hoag Orthopedic Institute Surgery Center - Newport Beach
  • Children's Hospital Orange County - Orange
  • Newport Orthopedic Institute - Irvine Orthopedics
  • Newport Orthopedic Institute - Newport Beach Orthopedics