Marc S. Kowalsky, MD

Dr. Marc Kowalsky
  • College: Dartmouth College, Hanover, NH
  • Medical School: Tufts University School of Medicine, Boston, MA, MD / MBA in Health Management
  • Residency: Orthopaedic Surgery, Columbia University Medical Center / New York Orthopaedic Hospital, New York, NY
  • Fellowship: Sports Medicine, Lenox Hill Hospital / Nicholas Institute of Sports Medicine & Athletic Trauma, New York, NY
    Shoulder & Elbow Surgery, Washington University School of Medicine, Saint Louis, MO
Dr. Kowalsky is a board-certified orthopedic surgeon with expertise in surgical and nonsurgical management of sports injury of the shoulder, elbow and knee, as well as complex shoulder and elbow conditions, including degenerative disease, trauma, and revision surgery. He has a particular interest in the management of shoulder and elbow arthritis, instability, ligament and tendon injuries, knee ligament injury and cartilage disorders. Dr. Kowalsky has authored original research manuscripts, review articles, and textbook chapters focusing on AC joint reconstruction, rotator cuff repair, and shoulder replacement. He currently serves as a reviewer for the Journal of the American Academy of Orthopaedic Surgeons, Journal of Shoulder and Elbow Surgery and the American Journal of Sports Medicine.

Dr. Kowalsky has cared for college and professional athletes at every level of competition. He has provided sports medicine coverage for the Tournament of Champions Squash Tournament and the United States Open Tennis Championship. As a sports medicine fellow, he was an assistant team physician for the New York Jets and the New York Islanders. He previously served as orthopedic surgery consultant for New York City Public School Athletic League Rugby and Play Rugby USA, and as the Medical Director of the New York Rugby Club Annual New York 7s Tournament. He currently serves as team physician for the White Plains Rugby Football Club, Iona College Rugby Football Club, and the Greenwich High School Rugby Team. Dr. Kowalsky is a team physician for the CT Whale of the National Women’s Hockey League, and of the USA Rugby National Team.  He currently serves as medical director for the Northeast Academy national development rugby program.



Dr. Kowalsky earned his medical degree at Tufts University School of Medicine in Boston, MA, where he also received an MBA in Health Management. He completed his residency in orthopedic surgery at Columbia University Medical Center in New York, NY. He then completed two subspecialty fellowships, the first in sports medicine at Lenox Hill Hospital / Nicholas Institute of Sports Medicine and Athletic Trauma, and the second in shoulder and elbow surgery at the Washington University School of Medicine. In addition, Dr. Kowalsky has subspecialty certification in Sports Medicine by the American Board of Orthopaedic Surgery, and has been inducted as a member of the American Shoulder and Elbow Surgeons.

Dr. Kowalsky currently sees patients at the ONS offices in Greenwich, Harrison, and Stamford.

Please click here to schedule an appointment.


Dr. Kowalsky repaired my torn ACL spring of 2019. I am so so thankful to be running, hiking, and exercising again and looking forward to trying skiing this winter! Dr Kowalsky took the time to patiently answer all of my questions before and after the surgery. He explained pros and cons for proceeding with surgical repair, the different ways to approach the repair, and reasons for choosing a specific technique for my surgery. I felt confidence in my decision to move forward with my surgery and have no regrets. (5 Star Google Review from D.G-P)
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Ski Injury Prevention

Aging and Exercise: Is Fitness the New Fountain of  Youth?

ACL Injuries in Youth: An Ounce of Prevention 

The Healthy Student Athlete

Throwing Injuries in Young Athletes

Watch Dr. Kowalsky’s presentation about opioid-free surgery

Watch Dr. Kowalsky discuss Shoulder Replacement (Arthroplasty)

Watch Dr. Kowalsky discuss Rotator Cuff Tears in Overhead Athletes



Diplomate, American Board of Orthopaedic Surgery
Fellow, American Academy of Orthopaedic Surgeons
Associate Member, American Shoulder and Elbow Surgeon
Association of Clinical Elbow and Shoulder Surgeons
Arthroscopy Association of North America
American Orthopaedic Society for Sports Medicine


Team Physician, Iona College Rugby Football Club: 2015-Present
Physician, White Plains Rugby Football Club: 2010-Present
Team Physician, USA Rugby National Team: 2013-Present
Medical Director, Northeast Academy: 2018-Present
Team Physician, Connecticut Whale: 2019-Present


American Board of Orthopaedic Surgery
American Board of Orthopaedic Surgery – Subspecialty Certificate in Sports Medicine


New York Super Doctors, 2015-2020
New York Super Doctors Rising Stars SM, 2013 – 2014 Patient Choice Award, 2012 – 2013
Best Fellow Research Presentation Award, Lenox Hill Hospital Department of Orthopaedic Surgery
Alexander Garcia, MD Senior Resident Award, New York Orthopaedic Hospital
Rosamond Kane, MD Pediatric Resident Award, New York Orthopaedic Hospital


Kowalsky, MS. “SLAP Tears and Lesions of the Biceps Tendon.” In AAOS Comprehensive Orthopaedic Review, 3rd Ed. Martin I. Boyer, MD, ed. Chicago: American Academy of Orthopaedic Surgeons, Rosemont, IL. 2019.

Brameier DT, Hirscht A, Kowalsky MS, Sethi PM.  “Rehabilitation Strategies After Shoulder Arthroplasty in Young and Active Patients”.  Clin Sports Med. 37(4): 569-583. 2018 Oct.

Davis DE, Maltenfort M, Abboud JA, Getz C, Rothman Institute Shoulder Consortium Group, Association of Clinical Elbow and Shoulder Surgeons.Classifying glenohumeral synovitis: a novel intraoperative scoring system”.  JSES. 26(11): 2047-2053, 2017 Nov.

Conroy C, Sethi P, Macken C, Wei D, Kowalsky MS, Mirzayan R, Pauzenberger L, Dyrna F, Obopilwe E, Mazzocca AD.  “Augmentation of a Distal Biceps Repair with an Acellular Dermal Graft Restores Native Biomechanical Properties in a Tendon Deficient Model”.  AJSM. 45(9): 2028-2033, 2017 Jul.

Porter DA, Birns M, Hobart SJ, Kowalsky MS, Galano GJ.  “Arthroscopic Treatment of Osseous Instability of the Shoulder”.  HSS Journal.   13: 292-301, 2017 May.

Kowalsky, MS.  “Minimally Invasive Treatment of Elbow Articular Cartilage Injury”.  In Minimally Invasive Surgery in Orthopedics, 2nd Ed.  Scuderi GR, Tria AJ, ed.  Springer, New York. 2016.

Minimally Invasive Surgery in Orthopedics, 2nd Ed.  Scuderi GR, Tria AJ, editors.  Kowalsky, MS, Elbow Section editor.  Springer, New York. 2016

Ponzio DY, VanBeek C, Wong JC, Padegimas EM, Anakwenze OA, Getz CL, Abboud JA, ACESS Group. “Profile of Current Opinion on Arthroscopic Acromioplasty: A Video Survey Study”. Arthroscopy. 32(7): 1253-62, 2016 Jul.

Kowalsky MS, Zuckerman JD. “Chronic Glenohumeral Dislocation: Anterior and Posterior”.  In Clinical Decision Support: Shoulder and Elbow.  Zuckerman JD, Oh L, Strauss E, ed. Decision Support in Medicine, LLC, Wilmington, DE.  2015.

Kowalsky, MS. “Minimally Invasive Treatment of Elbow Articular Cartilage Injury“. In: Minimally Invasive Surgery in Orthopedics, 2nd Ed. Scuderi GR, Tria AJ, editors. New York: Springer, New York; 2016: 1-16.

Kowalsky, MS.  “SLAP Tears and Lesions of the Biceps Tendon”.  In AAOS Comprehensive Orthopaedic Review,  2nd  Ed. Boyer, MI, ed.  American Academy of Orthopaedic Surgeons, Rosemont, IL.  2014

Kowalsky MS, Galatz LM, Shia DS, Steger-May K, Keener JD.  “The relationship between scapular notching and reverse shoulder arthroplasty prosthesis design”.  JSES.  21(10): 1430-41, 2012 Oct.

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