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Keith R. Reinhardt, MD

Keith Reinhardt, MD Specialized in adult reconstructive surgery of the hip & knee

Keith R. Reinhardt, MD FAAOS specializes in adult reconstructive surgery of the hip and knee, including primary and revision joint replacements. He is the Chief of Joint Reconstruction and founder of the Institute for Joint Replacement at South Shore University Hospital. Dr Reinhardt holds the academic title of Assistant Professor at the Donald and Barbara Zucker School of Medicine at Hofstra/Northwell. He is also an active member of the American Association of Hip and Knee Surgeons, the premier international professional society dedicated to the study and treatment of hip and knee disorders.

Dr. Reinhardt grew up on the South Shore of Long Island before attending Cornell University for his undergraduate studies, where he was a Cornell Tradition Scholar and graduated with distinction at the top of his class. He completed his medical school education at NYU Langone and was a member of the Alpha Omega Alpha medical honor society. He then trained at some of the most prestigious orthopaedic institutions in the world, including the Hospital for Special Surgery where he developed a keen interest in hip and knee replacement. This inspired him to pursue subspecialty training in a fellowship in Adult Joint Reconstruction at Harvard Brigham and Women's Hospital.

Dr. Reinhardt has achieved many awards and honors throughout his career. While at Hospital for Special Surgery he was awarded the prestigious Lewis Clark Wagner MD Award for excellence in clinical/translational research, and during his fellowship at Harvard he was chosen to receive the exclusive Current Concepts in Joint Replacement Foundation Scholarship.

Dr. Reinhardt is committed to ongoing education and research and advancing the field of joint replacement. He is actively involved in clinical research and continues to pursue the most advanced technology for his patients, including robotics. Dr. Reinhardt draws on his diverse educational and training experiences to deliver the highest quality personalized care to his patients with the goal of reducing pain and optimizing function.

Dr. Reinhardt Video

Areas of focus

Education

Cornell University
Ithaca, NY
Degree: Bachelor of Science
Majors: (1) Human Biology, (2) Nutritional Science
08/1999 - 05/2003

New York University Grossman School of Medicine
New York, NY
Degree: M.D., May 2007
08/2003 - 05/2007

Post-Graduate Training
  • Orthopaedic Surgery Residency, Hospital for Special Surgery
    New York, NY
    06/2007 - 06/2012
  • Total Joint Arthroplasty Fellowship
    Harvard Brigham and Women's Hospital
    Boston, MA
    08/2012 - 08/2013
Professional Employment
  • Attending Orthopaedic Surgeon
    Assistant Professor of Orthopaedic Surgery
    Northwell Health Physician Partners Orthopaedic Institute
    Donald & Barbara Zucker School of Medicine at Hofstra/Northwell
    South Shore University Hospital, Bayshore, NY
    09/2013 - Present
  • Chief of Joint Reconstruction
    Northwell Health Physician Partners Orthopaedic Institute
    Institute for Joint Replacement
    South Shore University Hospital, Bayshore, NY
    08/2018-Present
  • Director of Ambulatory Joint Replacement
    South Shore Surgery Center, Bayshore, NY
    5/2021 - Present
Board Certifications
  • Board Certified - American Board of Orthopaedic Surgery
    Certified: 07/23/2015 through 12/31/2025;
    Participating in MOC: Yes
Professional Society Memberships
  • 2007-2012, Resident Member, American Academy of Orthopaedic Surgeons
  • 2012-present, Candidate Member, American Academy of Orthopaedic Surgeons
  • 2012-present, Member, Hospital for Special Surgery Alumni Association
  • 2013-present, Candidate Member, American Association of Hip and Knee Surgeons
  • 2019-present, Active Fellow, American Academy of Orthopaedic Surgeons
  • 1999-2003 Cornell Tradition Scholar, Cornell University
  • 2003 Graduate with Distinction, Cornell University
  • 2006 Member, Alpha Omega Alpha (AOA), NYU School of Medicine
  • 2008 Outstanding, Bi-annual appraisal, Hospital for Special Surgery
  • 2010 Outstanding, Bi-annual appraisal, Hospital for Special Surgery
  • 2012 Lewis Clark Wagner, MD Award for Excellence in Orthopaedic
    Clinical/Translational Research, Hospital for Special Surgery
  • 2013 Current Concepts in Joint Replacement Foundation Scholarship
  • 2014 AAOS Now, Top Story - study on TKR analgesia
  • 2023, 2024 Castle Connolly Top Doctor
Local and National Service
  • 2009, 2011, 2013 Journal manuscript reviewer, Journal of The Hospital for Special Surgery
  • 2010, 2011, 2012 Journal manuscript reviewer, Clinical Orthopaedics and Related Research
  • 2021, 2022, 2023 Journal Manuscript reviewer, Journal of Knee Surgery
  • Community Outreach Lectures on Joint Replacement – October 2017, October 2018, June 2019, October 2020, October 2023
Grant Support
  • Adult Reconstruction and Joint Replacement (ARJR) Division Research Grant - July 2010
  • Surgeon-in-Chief Fund Research Grant (Hospital for Special Surgery) - March 2011
  • Eduardo A. Salvati, MD Resident Research Grant - May 2011
Research Experience

Presentations

  1. American Association of Pediatrics (AAP), National Conference and Exhibition. Comparison of intramedullary nailing to plating for both-bone forearm fractures in older children. October 2006; Atlanta, GA. podium presentation.
  2. American Association of Orthopaedic Surgeons (AAOS), Annual Meeting. Comparison of intramedullary nailing to plating for both-bone forearm fractures in older children. February 2007; San Diego, CA. podium presentation.
  3. European Society of Sports Traumatology, Knee Surgery and Arthroscopy (ESSKA), 13th Annual Congress. Clinical factors that affect surgical decision-making in partial meniscectomy. May, 2008; Porto, Portugal. podium presentation.
  4. American Association of Foot and Ankle Surgeons (AOFAS), Annual Meeting. Treatment of Lisfranc fracture dislocations with primary partial arthrodesis. July 2010; National Harbor, MD. podium presentation.
  5. Hospital for Special Surgery Holiday Total Knee Course. Radiographic analysis of a hand-held, accelerometer-based surgical navigation system for tibial resection in total knee arthroplasty. December, 2010; New York, NY. poster presentation. 
  6. International Society for Arthroscopy, Knee Surgery, and Orthopaedic Sports Medicine (ISAKOS) 2011 Congress. Revision anterior cruciate ligament reconstruction in adolescents. May 2011; Rio de Janiero, Brazil. e-poster presentation.
  7. Eastern Orthopaedic Association (EOA) 42nd Annual Meeting. Low Energy Patellar Fractures: An Osteoporotic Fracture and Sign of Decrease Bone Strength in Men? October, 2011; Williamsburg, VA. poster presentation.
  8. Hospital for Special Surgery Hip Pain and Preservation Center, Grand Rounds. Combined Hip Arthroscopy and Periacetabular Osteotomy. November, 2011; New York, NY. podium presentation.
  9. Hospital for Special Surgery Annual Chief Resident Research Presentations. Continuously-infused intra-articular ropivacaine versus epidural plus femoral nerve block for pain control following total knee arthroplasty –a prospective, randomized, double-blinded trial. March, 2012; New York, NY. podium and poster presentations.
  10. Eastern Orthopaedic Association 43rd Annual Meeting. Accelerometer-based, portable navigation versus imageless, large console computer assisted navigator in total knee arthroplasty: a comparison of radiographic results. June 2012; Bolton Landing, NY. podium presentation.
  11. Harvard Robert’s Arthroplasty Conference. Cruciate-retaining total knee replacement following patellectomy. August 2012; Boston, MA. podium presentation.
  12. Harvard Robert’s Arthroplasty Conference. Treatment of extra-articular femoral deformity in patients with ipsilateral knee arthritis. September 2012; Boston, MA. podium presentation.
  13. International Society for Technology in Arthroplasty –25th Annual Congress. The effect of a newer generation fibrin sealant on total blood volume loss during knee arthroplasty. October 2012; Sydney, Australia. podium presentation.
  14. International Society for Technology in Arthroplasty –25th Annual Congress. Accelerometer-Based, Portable Navigation versus Imageless, Large Console Computer Assisted Navigation in Total Knee Arthroplasty: A Comparison of Radiographic Results. October 2012; Sydney, Australia. poster presentation.
  15. Harvard Advances in Arthroplasty, 42nd Annual Course. Does surgical approach matter –Direct Anterior Approach for Total Hip Replacement. October 2012; Boston, MA. podium presentation.
  16. Harvard Advances in Arthroplasty, 42nd Annual Course. Direct Anterior Approach total hip replacement –Live surgery demonstration via telecast. October 2012; Boston, MA.
  17. Hospital for Special Surgery, Alumni Association 94th Annual Meeting. Continuously-infused intra-articular ropivacaine versus epidural plus femoral nerve block for pain control following total knee arthroplasty –a prospective, randomized, double-blinded trial. November 2012; New York, NY. poster presentation.
  18. Current Concepts in Joint Replacement. The effect of a newer generation fibrin sealant on total blood volume loss during total knee arthroplasty. December 2012; Orlando, FL. podium presentation.
  19. Association of Bone and Joint Surgeons, Annual Meeting. Continuously-infused intra-articular ropivacaine versus epidural plus femoral nerve block for pain control following total knee arthroplasty –a prospective, randomized, double-blinded trial. April 2013; Istanbul, Turkey. podium presentation.
  20. Harvard Morbidity & Mortality Conference. Peroneal nerve palsy and periprosthetic femur fracture following THR. April 2013; Boston, MA. podium presentation.
  21. 2013 Members Meeting of the Knee Society. Long-term survivorship of cruciate-retaining total knee replacement in patellectomy patients. September 2013; Toronto, ON, Canada. podium presentation.
  22. Orthopaedic Grand Rounds –Southside Hospital. The direct anterior approach for THR –fact or fiction? January 2014; Bayshore, NY. podium presentation.
  23. All Things Joints Conference, Northwell Health Physician Partners Orthopaedic Institute, 2018. Debate – Direct anterior approach THR – What’s not to like? March 2018; Woodbury, NY. podium presentation
  24. All Things Ortho Conference, Northwell Health Physician Partners Orthopaedic Institute, 2019. Complex case presentations. March 2019; Woodbury, NY. case presenter /panel moderator.
  25. Northwell Health Community Seminar: Tips for Active Seniors. Treatment of hip arthritis – benefits and advancements in hip replacement. June 2019; Greenlawn, NY, podium presentation.
  26. Northwell Health Community Seminar. What’s new in joint replacement surgery? June 2019; Bayport, NY. podium presentation.
  27. JPAR Joint education series. Pre- and Post-operative Examination of the Knee. November 2020, Long Island, NY, webinar.
  28. Naylor B, Caid M, Itturiaga C, Reinhardt KR. Heterotopic ossification following direct anterior total hip arthroplasty with and without post-operative non-steroidal anti-inflammatories. Poster presentation. AAOS August 2021
  29. Lennox Hill Adult Reconstruction fellowship lecture. Robotics and navigation in total knee arthroplasty. November 2022 & 2023, Long Island NY, webinar.
  30. Lennox Hill Adult Reconstruction fellowship lecture. Outpatient total joint arthroplasty. July 2023, Long Island NY, webinar.
  31. JPAR Joint education series. Monitoring patients after surgery: Interactive technology. April 2022, Long Island, NY, webinar.
  32. JPAR Joint education series. Outpatient total joint arthoplasty. June 2023, Long Island, NY, webinar.
  33. Northwell Health Community Seminar. Advances in total hip arthroplasty. October 2023, Long Island, NY. podium presentation

Peer-reviewed Journal Articles

  1. Reinhardt KR, Feldman DS,Green DW, Sala DA, Widmann RF, Scher DM. Comparison of intramedullary nailing to plating for both-bone forearm fractures in older children. J Pediatr Orthop. 2008 Jun; 28(4):403-9.
  2. Reinhardt KR, Hetsroni I, Marx RG. Graft selection for anterior cruciate ligament reconstruction: A Level I systematic review comparing failure rates and functional outcomes. Orthop Clin North Am. 2010 April; 41 (2):249-262.
  3. Reinhardt KR, Kim HJ; Lorich DG. Anomalus external jugular vein: clinical concerns in treating clavicle fractures. Arch Orthop Trauma Surg. 2010 May; 130(7).
  4. Hammoud S, Reinhardt KR, Marx RG. Outcomes of PCL treatment –A review of the evidence. Sports Med Arthrosc. 2010 Dec; 18(4):280-291.
  5. Cross MB, Osbahr DC, Nam D, Reinhardt KR, Bostrom MP, Dines JS. An analysis of the hip and knee reconstruction section of the Orthopaedic In-Training Examination (OITE). Orthopedics 2011 Sept. 34(9):550-555.
  6. Kim HJ, Fragomen AT, Reinhardt KR, Hutson JJ Jr, Rozbruch SR. Lengthening of the femur over an existing intramedullary nail. J Orthop Trauma 2011 Nov; 25(11):681-4.
  7. Nam D, Jerabek S, Haughom B, Cross M, Reinhardt KR, Mayman D. Radiographic analysis of a hand-held, accelerometer-based surgical navigation system for tibial resection in total knee arthroplasty. J Arthroplasty 2011 Dec; 26(8):1527-33.
  8. Reinhardt KR, Oh L, Schottel P, Roberts M, Levine DS. Treatment of Lisfranc fracture dislocations with primary partial arthrodesis. Foot and Ankle International 2012 Jan 33(1):50-56.
  9. Nemani V, Frank R, Reinhardt KR, Yanke A, Pasqual-Garrido C, Drakos M, Warren RF. Popliteal venotomy during posterior cruciate ligament reconstruction in the setting of a popliteal artery bypass graft: a case report. Arthroscopy 2012 Feb; 28(2):294-9.
  10. Reinhardt KR, Hammoud S, Bowers AL, Umunna BP, Cordasco FA. Revision ACL reconstruction in skeletally mature athletes younger than 18 years. Clin Orthop Relat Res 2012 March; 470(3)835-42.
  11. Lyman S, Oh LS, Reinhardt KR, Mandl LA, Katz JN, Levy BA, Marx RG. Surgical Decision-Making for Arthroscopic Partial Meniscectomy in Patients Over 40 Years. Arthroscopy 2012 April; 28(4):492-501.
  12. Nam D, Umunna BP, Cross MB, Reinhardt KR, Duggal S, Cornell C. Clinical results and failure mechanisms of a non-modular constrained knee without stem extensions. HSS Journal July 2012;8(2):96-102.
  13. Reinhardt KR, Lazaro LE, Umunna BP, Cross MB, Helfet DL, Lane JM, Lorich DG. Plasma 25-hydroxyvitamin D levels in operative patella fractures. HSS Journal Feb 2013; 9(1):17-20.
  14. Nam D, Weeks D, Reinhardt KR, Nawabi D, Cross MB, Mayman D. Accelerometer-Based, Portable Navigation versus Imageless, Large Console Computer Assisted Navigation in Total Knee Arthroplasty: A Comparison of Radiographic Results. Journal of Arthroplasty 2013 Feb;28(2):255-61.
  15. Reinhardt KR, Osoria H, Nam D, Figgie MP, Alexiades M, Su E. Reducing blood loss in total knee replacement –a fibrin solution. Bone Joint J. 2013 Nov 1;95-B(11 Suppl A):135-9.
  16. Nam D, Abdel MP, Cross MB, Lamont LE, Reinhardt KR, Mcarthur BA, Mayman D, Hanssen AD, Sculco TP. The Management of extensor mechanism complications in total knee arthroplasty. AAOS exhibit selection. J Bone Joint Surg Am. 2014 Mar 19;96(6):e47
  17. Reinhardt KR, Duggal S, Umunna BP, Reinhardt GA, Nam D, Alexiades M, Liu S, Cornell C. Intra-articular analgesia versus epidural plus femoral nerve block after TKA –a randomized, double-blind trial. Clin Orthop Relat Res 2014 May;472(5):1400-8.
  18. Reinhardt KR, Hufaker S, Thornhill TS, Scott R. Cruciate-retaining TKR is an option in patients with prior patellectomy. Clin Orthop Relat Res 2015 Jan;473(1):111-4.
  19. Khamaisy S, Gladnick BP, Nam D, Reinhardt KR, Heyse TJ, Pearle AD. Lower limb alignment control –is it more challenging in lateral compared to medial unicondylar knee arthroplasty? Knee. 2015 Sep;22(4):347-350.
  20. Naylor B, Caid M, Itturiaga C, Reinhardt KR. Heterotopic ossification following direct anterior total hip arthroplasty with and without post-operative non-steroidal anti-inflammatories. J Arthroplasty. 2021 Oct;36(10):3471-77.
  21. Ganz MP, Danoff J, Gerber B, Reinhardt KR, Ciminiello M, Scuderi G. Patient-specific venous thromboembolic event prophylaxis in total joint arthroplasty – literature-supported guidelines. Surg Technol Int 2023 42:1-8.
  22. Mannino A, Reinhardt KR. Virtual range of motion is a safe and acceptable alternative to intra-operative manual range of motion testing in direct anterior robotic total hip arthroplasty. Journal of Orthopaedics 2024 Aug;54:57-66.

Book Chapters

  1. Reinhardt KR, Ranawat AS. Collateral ligament injuries of the knee. In: F. Margheritini and R. Rossi (Eds), Orthopaedic Sports Medicine: Principles and Practice. Milan: Springer, 2010.
  2. Reinhardt KR, Drakos M, Warren RF. Posterolateral and posteromedial corners of the knee. In: A Ranawat and BT Kelly (Eds), Musculoskeletal examination of the hip and knee: making the complex simple. New Jersey: SLACK Inc., 2010;pp.399-424.
  3. Reinhardt KR, McCarthy M, Lorich DG. Forefoot Trauma. In: Foot and Ankle Sports Medicine, 1st ed.
  4. Schottel P, Reinhardt KR, Difelice G, Ranawat AS. Surgical treatment of traumatic quadriceps and patella tendon injuries of the knee. In: Atlas of Essential Orthopaedic Procedures, 2013.

Abstracts

  1. Oh LS, Reinhardt KR, Lyman S, Mandl LA, Katz J, Levy BA, Marx RG. Clinical factors that affect surgical decision-making in partial meniscectomy. Knee Surg Sports Traumatol Arthrosc. 2008 May;16(suppl 1):S48.
  2. Reinhardt KR, Duggal S, Umunna BP, Reinhardt GA, Nam D, Liu S, Alexiades M, Cornell C. Continuously-infused intra-articular ropivacaine versus Epidural plus femoral nerve block for pain control following total knee arthroplasty – a prospective, randomized, double-blinded trial. (Hospital for Special Surgery 2012 Resident and Fellow Research Presentations Award-winning Abstracts) HSS Journal October 2012;8(3):320-4.

Other Brief Communications/Scientific Exhibits

  1. Hammoud S, Reinhardt KR, Marx RG. Current Trends in PCL Reconstruction and a Systematic Review of Surgical Outcomes. American Association of Orthopedic Surgeons (AAOS), Annual Meeting, Feb 2011; scientific exhibit.
  2. Cross MB, Maak T, Nam D, Dy C, Delos D, Reinhardt KR, Ranawat A, Pearle A. The Meniscal Tear in the Varus Knee: A Multidisciplinary Approach. American Association of Orthopedic Surgeons (AAOS), Annual Meeting, Feb 2011; scientific exhibit.
  3. Cross MB, Nam D, Reinhardt KR, McArthur B, Bostrom M. A Clinician’s Guide to Pharmacologic Agents in Orthopaedic Surgery. American Association of Orthopedic Surgeons (AAOS), Annual Meeting, Feb 2012; scientific exhibit.
  4. Nam D, Cross MB, Reinhardt KR, Sculco TP, Mayman D. Management of extensor mechanism injuries following total knee replacement. American Association of Orthopedic Surgeons (AAOS), Annual Meeting, March 2013; scientific exhibit.
Research In Progress
  1. Bonnani S, Jen A, Itturiaga C, Reinhardt KR. Is intra-operative robotic range of motion predictive of ultimate range of motion after robotic total knee replacement? data analysis in progress
  2. Bonnani S, Reinhardt KR. Robotically-planned tibial component rotation does not coincide with articulated tibial component rotation during total knee arthroplasty. IRB in progress
  3. Mansour E, Reinhardt KR. Ambulatory joint replacement does not always go as planned when done in a hospital setting.  IRB in progress
Clinical Interests / Expertise
  • Primary hip and knee arthroplasty
  • Complex and Revision hip and knee arthroplasty
  • Cruciate retaining and posterior-stabilized total knee arthroplasty
  • Unicompartmental knee replacement
  • Robotic joint replacement
  • Direct anterior approach and posterior approach total hip arthroplasty
  • Surgical technologies for arthroplasty - mixed reality
Locations & Directions We provide the highest quality orthopaedic healthcare in Babylon & Smithtown, NY.
  • Northwell Health Physician Partners Orthopaedic Institute at Babylon
    200 West Main Street
    Suite 1 Building B
    Babylon, NY 11702
    Request An Appointment
  • Northwell Health Physician Partners Orthopaedic Institute at Smithtown
    222 Middle Country Road
    Smithtown, NY 11787
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