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Michael P. Ast, MD

Hip and Knee Replacement Surgeon
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About Dr. Ast


Dr. Michael P. Ast is an Orthopedic Surgeon and Chief Medical Innovation Officer at HSS focusing on rapid-recovery, short-stay and outpatient joint replacement surgery including primary, complex and revision total joint replacement. His training includes minimally invasive hip and knee replacement, partial knee replacement, robotic surgery and computer assisted surgery.

Dr. Ast has both clinical and teaching expertise in the use of robotics and computer assistance in joint replacement surgery, and was the director of robotic and computer assisted surgery at a major university institution in New Jersey. He has extensive experience with, and has published research on, patient-specific instruments and implants. During his studies, he published numerous articles and chapters in peer-reviewed journals and internationally distributed textbooks, including several chapters on "Approaches for Hip Replacement Surgery." He has also presented clinical and basic science research both nationally and internationally.

Dr. Ast grew up in Staten Island, New York, and attended Temple University, where he graduated Magna Cum Laude in Biology and Phi Beta Kappa. He completed his Medical Degree at Temple University School of Medicine and returned to New York for his residency training in orthopedic surgery at North Shore-Long Island Jewish Medical Center and a fellowship in Adult Reconstruction and Joint Replacement surgery at HSS. Before returning to HSS, he previously developed and directed one of the largest and most successful outpatient joint replacement programs in the northeast.

Dr. Ast was a Division I gymnast at Temple University and captain of the conference champions and top ten nationally ranked team in 2003. He is married with two children, and enjoys playing tennis, golfing, fishing, skiing and traveling.

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Specialized Centers

Complex Joint Reconstruction Center

Special Expertise

Partial and total knee replacement
Rapid recovery, short stay and outpatient joint replacement
Total hip replacement


Computer-assisted partial and total knee replacement
Robotic-assisted partial and total knee replacement
Robotic-assisted total hip replacement


Patient ratings for Dr. Ast


Learn more about our patient ratings.


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.



Associate Attending Orthopedic Surgeon, Hospital for Special Surgery
Chief Medical Innovation Officer, Hospital for Special Surgery
Vice Chair, Innovation, Hospital for Special Surgery
Associate Professor of Clinical Orthopedic Surgery, Weill Cornell Medical College
Associate Attending Orthopedic Surgeon, NewYork-Presbyterian Hospital


Fellow of American Academy of Orthopaedic Surgery
Member of American Association of Hip and Knee Surgeons
Board Member of Eastern Orthopaedic Association


Board Certified - American Board of Orthopedic Surgery


Bergen Magazine's Top Doctors 2021
NJ Top Docs Top Doctors 2021


Temple University School of Medicine, 2007


North Shore - LIJ Health System, 2008


North Shore - LIJ Health System, 2012


Hospital for Special Surgery, 2013

State Licensure



For My Patients

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Directions to The Pavilion

My office is located at The Pavilion, 541 East 71st Street. The main entrance to The Pavilion is on the north side of 71st Street underneath the sky bridge that connects the main hospital to the Belaire Building.

Pavilion map

Publications by Dr. Ast

Selected Journal Articles

Selected Books/Chapters

Ast MP. High Yield Facts in the Hand. First Aid for the Surgery Clerkship- Third Edition. McGraw Hill, 2016.

Ast MP. High Yield Facts in Orthopaedics. First Aid for the Surgery Clerkship- Third Edition. McGraw Hill, 2016.

Ast MP, Bezwada HP. How to Identify and Correct Technical Errors. The Direct Anterior Approach to Hip Reconstruction.SLACK Inc, 2016.

Ast MP, Ranawat AS. Surgical Approaches for THR in Hip Replacement- Editor Lawrence D. Dorr. Future Medicine Ltd,2013.

Ast MP, Ranawat AS. Surgical Approaches for the Hip- Evidence vs. Advertising in World Clinics in Orthopaedics. JPMedical Publishers, 2013.

Goldstein MJ, Ast MP, Silber JS, Anderson DG, Albert TJ. Chapter 82- Cervical Kyphosis. The Cervical Spine: 5th Edition. Lippincott, Williams and Wilkins, 2010.

Ast MP. High Yield Facts in the Hand. First Aid for the Surgery Clerkship- Second Edition. McGraw Hill, 2009.

Selected Presentations

Ast MP, Kiser C, Su E. Early Experience with Handheld Navigation for Direct Anterior THA. Australia Orthopaedic Association Annual Meeting; Adelaide, AUS, October 2017.

Ast MP, Mayman DJ, Della Valle AM, Bostrom MP, Haas SB. Near Miss Medical Errors in Total Joint Arthroplasty. HSS 2014 Holiday Knee Course: New York, NY, December 2014.

Ast MP, Abdel MP, Ruel AV, Lee Y, Lyman S, Westrich GH. Weight Change after Total Hip and Total Knee Replacement: Incidence, Predictors, and Affects on Clinical Outcomes. AAOS 2014: New Orleans, LA.

Ast MP, John TK, Gonzalez Della Valle AM. Fracture of Highly Crosslinked Acetabular Liners: An analysis of cases reported to the United States Food and Drug Administration. AAOS 2014: New Orleans, LA.

Ast MP, Mayman D, Su E, Gonzalez Della Valle A, Bostrom M, Parks M, Haas S. The reduction of implant related errors and waste in total knee arthroplasty using a novel, computer based, e.Label and compatibility system. Eastern Orthopaedic Association; Miami, FL, October 2013.

Banka TR, Ast MP, Fields K, Lyman S, Westrich GH. Pre-operative predictors of postoperative pain after total knee replacement. Eastern Orthopaedic Association; Miami, FL, October 2013.

Lyman S, Ast MP, Abdel MP, Gorab AH, Ruel A, Westrich GH. Weight loss following hip and knee arthroplasty. International Society of Orthopaedic Registries; Stratford-Upon-Avon, England, March 2013.

Ast MP, Mayman D, Su E, Gonzalez Della Valle A, Bostrom M, Parks M, Haas S. The reduction of implant related errors and waste in total knee arthroplasty using a novel, computer based, e. Label and compatibility system. HSS Holiday Total Knee Meeting; New York, December 2012.

Ast MP, Lementowski P. The use of matte finish stems to prevent stem displacement in cemented hemiarthroplasty. NS-LIJDept of Orthopaedic Surgery Alumni Research Day; New York, June 2012.

Ast MP, Roofeh J. Cost Effectiveness and Clinical Outcomes of Patient Specific Instrumentation for Total Knee Replacement. NS-LIJ Dept of Orthopaedic Surgery Alumni Research Day; New York, June 2011.


Current clinical research focuses on pain control after joint replacement surgery as well as the clinical safety and efficacy of hip and knee replacement implants. As Chief Medical Innovation Officer, Dr. Ast works with the HSS Innovation Institute team on new technologies that can improve clinical outcomes, enhance patient experience, and/or lower the cost of care. 

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. Ast as of February 09, 2024.

  • 3M - Honoraria
  • American Academy of Orthopaedic Surgeons (AAOS) - Board or Committee Member 
  • American Association of Hip and Knee Surgeons (AAHKS) - Board or Committee Member 
  • Convey MD - Advisory Board; Ownership Interest
  • Foundation for Physician Advancement - Committee Member; Honoraria
  • HS2, LLC - Ownership Interest
  • HSS ASC Development Network- Ownership Interest
  • Joint Effort Administrative Services Organization - Ownership Interest
  • OrthAlign, Inc. - Consultant; Ownership Interest; Royalties
  • Ospitek- Chief Medical Officer; Ownership Interest
  • Osso VR - Ownership Interest
  • Parvizi Surgical Innovation - Ownership Interest
  • Smith & Nephew - Consultant; Research Support; Speakers' Bureau
  • Stryker - Consultant; Research Support

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.

Dr. Ast in the News