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Michael J. Klein, MD

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Dr. Michael J. Klein is an Attending Pathologist at Hospital for Special Surgery. He specializes in the diagnosis and treatment of bone and soft tissue tumors, non-neoplastic bone diseases, joint diseases, and laboratory medicine specific to bone and soft tissue disease.

Dr. Klein received his medical degree from Temple University in Philadelphia, PA, and then completed his internship, residency, and fellowship at New York University Medical Center. Throughout his career, he has been an active member in several professional organizations, has maintained numerous editorial appointments, and has published extensively.

In addition, Dr. Klein has been awarded a number of prestigious honors. These include New York University Medical Center's Twenty-Five Year Service Award and the International Skeletal Society's Corrine Farrell Award. He has consistently been ranked as one of the Best Doctors in America and has been recognized often for his excellence in teaching.


Special Expertise

Diagnosis and treatment of bone and soft tissue tumors
Diagnosis and treatment of non-neoplastic bone diseases
Diagnosis and treatment of joint diseases
Laboratory medicine specific to bone and soft tissue diseases


Interpretation of bone, joint, soft tissue, and general surgical pathology
All laboratory medicine (excluding blood banking)

Patient Stories


If your insurance is not listed, please call our office if you have questions regarding your insurance coverage. If you have out-of-network benefits, then your insurance may reimburse you for a portion of your office visit. We will work with you and your insurance to minimize your out-of-pocket costs. Financial assistance may be available for patients in need.



Attending Pathologist, Hospital for Special Surgery


International Skeletal Society
American Society of Clinical Pathologists
United States and Canadian Academy of Pathology
College of American Pathologists


Anatomical /Clinical Pathology, American Board of Pathology, 1978
Voluntary Recertification, American Board of Pathology, 2004


Leonard Robinson Award for Excellence in Resident Education, 2008
Best Doctors in America, 2003-2008
Founders Lecturer, International Skeletal Society, 2005
Henry L. Jaffe Lecturer, Hospital for Joint Diseases Orthopaedic Institute, 2003
Twenty-Five Year Service Award, NYU School of Medicine, 2000
Corrine Farrell Award, International Skeletal Society, 1996
Excellence in Teaching Awards, Mt. Sinai School of Medicine, 1989-1991, 1993-1995, 1998, 2003


MD, Temple University, Philadelphia, PA, 1973


New York University Medical Center, New York, 1974


New York University Medical Center, New York, 1977


New York University Medical Center, New York, 1979

State Licensure



Publications by

Selected Journal Articles

Editorial Appointments

Editorial Board, Human Pathology
Editorial Board, Skeletal Radiology
Editorial Board, Advances in Anatomical Pathology
Editorial Board, (Consultant Editor of Research) The Journal of Bone and Joint Surgery (American)


Research Interests

Pathoradiographic correlation methods
Use of informatics to improve diagnoses and clinical research methods

Industry Relationships

Industry Relationships

HSS has a long history of supporting appropriate relationships with industry because they advance HSS's mission to provide the highest quality patient care, improve patient mobility, and enhance the quality of life for all, and to advance the science of orthopedic surgery, rheumatology, and their related disciplines through research and education.

Below are the healthcare industry relationships reported by Dr. Klein as of February 09, 2024.

  • Abbott - Ownership Interest
  • Bristol Myers Squibb - Ownership Interest
  • Eli Lilly & Company - Ownership Interest
  • Johnson & Johnson, Inc. - Ownership Interest
  • Medtronic PLC COM (MDT) - Ownership Interest
  • Pfizer, Inc. - Ownership Interest
  • United Health Group - Ownership Interest

HSS and its physicians make this information available to patients and the public, thus creating a transparent environment for those who are interested in this information. Further, the HSS Conflicts of Interest and Commitment Policy prohibits physicians from collecting royalties on products they develop that are used on patients at HSS.

Patients should feel free to ask their HSS physicians questions about these relationships.