Robert G. Marx, MD, MSc, FRCSC

Dr. Robert Marx is an Attending Orthopedic Surgeon at Hospital for Special Surgery in New York City and Professor of Orthopedic Surgery and Public Health at Weill Cornell Medical College. One of New York Magazine’s “Best Doctors in New York,” Dr. Marx specializes in arthroscopic and open procedures for knee and shoulder problems, including knee and shoulder joint replacement surgery. As director of the Foster Center for Clinical Outcome Research, Dr. Marx is also involved in research aimed at improving patient care. He has published three books and over 180 peer-reviewed publications. He has also lectured on surgical techniques nationally and internationally.

Learn more about Dr. Marx and read testimonials from past patients at his website

Dr. Robert Marx: Areas of Specialty

Having an operation is a big decision. When deciding to recommend surgery, Dr. Marx treats all patients’ cases individually and suggests surgical options only when appropriate. Dr. Marx does many complex and revision operations, so many of the patients he sees have had several opinions prior to seeing him. He also sees many patients who have been told they need a more routine operation and would like to be in the capable and caring hands of Dr. Marx. Read below for further information to help find the right procedure for you.

The ACL Solution
Prevention and Recovery for Sports' Most Devastating Knee Injury

ACL and Multi-ligament Knee Reconstruction:

Anterior cruciate ligament (ACL) injuries are one of the more common sports-related injuries. Using arthroscopic techniques, Dr. Marx specializes in reconstructing the ACL. Dr. Marx utilizes a variety of techniques and graft sources depending on the patient’s case, including patellar tendon, hamstrings, and transplant. Dr. Marx is also experienced in revision surgeries after failed ACL reconstruction.

In some cases, more than one ligament in the knee (i.e. ACL, PCL, MCL, and/or LCL/posterolateral corner) requires reconstructive and/or revision surgery for failed ACL reconstruction. Dr. Marx is also experienced in these complex surgeries, having published and lectured extensively on this topic at national and international conferences.

Shoulder Surgery for Dislocation or Trauma:

Dr. Marx has experience performing shoulder stabilization surgeries for patients following dislocations or fractures after trauma. He also offers revision surgeries for patients who have had failed dislocation repairs.

Rotator Cuff Repair:

Dr. Marx offers arthroscopic rotator cuff repair surgery for small and large tears. The arthroscopic approach involves four small incisions, each measuring less than a centimeter, and can relieve pain and improve strength in injured shoulders.

Arthroscopy and Complex Knee Surgery:

Dr. Marx performs many other complex knee surgeries. Patients with meniscus injuries may come in for a consultation for meniscus surgery or meniscus transplantation. During these surgeries, Dr. Marx repairs or removes torn sections of the meniscus arthroscopically. He also performs osteotomies to improve leg alignments, cartilage transplants, and complex knee-revision surgery.

Shoulder and Knee Replacement:

Patients with pain and limited movement that prevent normal function and impact quality of life often find relief with shoulder or knee replacements. Joint replacement surgery can allow patients who are limited by their arthritis to return to a more active and normal lifestyle.

Pediatric Knee Surgery:

Dr. Marx has special expertise in treating knee problems in pediatric and adolescent patients. He performs physeal-sparing ACL reconstruction for skeletally immature (still growing) patients to avoid injury to the growth plates. He also has extensive experience treating discoid meniscus in children as well as Osteochondritis Dissecans (OCD) and performs a variety of techniques to address these lesions.


Attending Orthopedic Surgeon, Hospital for Special Surgery
Director, Foster Center for Clinical Outcome Research, Hospital for Special Surgery
Professor of Orthopedic Surgery, Weill Cornell Medical College
Professor of Public Health, Weill Cornell Medical College



“Best Doctors in New York,” New York Magazine
Best Paper Award, awarded at the 12th International Congress for Shoulder and Elbow Surgery: Shoulder Program Oral Presentation, “Defining Indications for Rotator Cuff Repair: Predictors of Failure of Nonoperative Treatment of Chronic, Symptomatic, Full-Thickness Rotator Cuff Tears”, 2013
AOSSM Excellence in Research Award, “Development and Validation of a Pediatric Sports Activity Rating Scale”, 2013
3rd Annual HSS Patient Safety Champion Award, 2012 
O’Donoghue Sports Injury Research Award: The Effect of ACL Reconstruction on the Risk of Knee Reinjury, 2003 
ACL Study Group Research Grant (Principal Investigator), 1999 
D.R. Wilson Teaching Award, University of Toronto, 1998

Insurances Accepted

Blue Cross HMO POS
Blue Cross PPO
Blue Cross Pathway
Blue Cross Pathway Enhanced
United Healthcare

If your particular insurance plan is not listed, you may still have coverage subject to the availability of 'out-of-network' benefits. Please do not hesitate to contact our office if you have questions regarding your insurance coverage.


BSc, Université de Montréal, Montréal, Québec, Canada
MD, McGill University, Montréal, Québec, Canada
MSc, Clinical Epidemiology, University of Toronto, Toronto, Ontario, Canada


University of Toronto, Toronto, Ontario, Canada


Sports Medicine/Shoulder and Knee Surgery, Hospital for Special Surgery, New York


American Board of Orthopedic Surgery
Royal College Surgeons of Canada

State Licensure

New York, Ontario

Robert G. Marx, MD, MSc, FRCSC has contributed to the following educational materials:

For Professionals - on

Selected Publications

The ACL Solution (seen above), Prevention and Recovery for Sports' Most Devastating Knee Injury, Robert G, Marx, MD, Grethe Myklebust, PT, PhD, Brian W. Boyle

Authored a textbook on revision ACL reconstruction, another textbook on bone tumors as well as many book chapters on shoulder and knee surgery
Authored over 150 peer-reviewed scientific articles
Over 100 national and international presentations

For more publications, please see the PubMed listing.

Research Description

Dr. Robert G. Marx is a clinician scientist at Hospital for Special Surgery. Dr. Marx has conducted extensive clinical orthopedic research, in an effort to improve patient outcomes, and has received numerous awards for his research and teaching.

Dr. Marx has published a textbook on revision anterior cruciate ligament (ACL) reconstruction surgery, another on bone tumors and a book on ACL injury prevention and recovery strategies for young athletes (The ACL Solution). He has also written book chapters on knee surgery and shoulder replacement surgery. He has published more than 150 peer-reviewed articles in leading orthopedic and research journals. Dr. Marx received the 2013 Excellence in Research Award presented by the American Orthopedic Society for Sports Medicine (AOSSM) for his development and validation of a pediatric sports activity rating scale. He also received the 2003 O'Donoghue Sports Injury Research Award presented by AOSSM for a study of determinants of knee reinjury following ACL tear.

Research Grants

Dr. Marx has received many peer-reviewed research grants. He was awarded research funding from the ACL Study Group (an international nonprofit organization dedicated to the study of the anterior cruciate ligament) and the MacArthur Foundation to study Cartilage Regeneration and Repair. Additionally, Dr. Marx served a five year term reviewing grants from other surgeons for the Orthopedic Research and Education Foundation (OREF), the nation's largest non-profit orthopedic research granting agency. He receives funding from the NIH for clinical studies on knee arthroscopy for meniscal tears as well as for ACL surgery. Dr. Marx was awarded a four million dollar - five year grant as a lead investigator for a study of outcomes after joint replacement surgery, funded by the United States government (Agency for Healthcare Research and Quality).

Appointed Member

In addition to his position as attending surgeon at the Hospital for Special Surgery, Dr. Marx is Professor of Orthopedic Surgery and Public Health at Weill Medical College of Cornell University. He is also Director of the Foster Center for Clinical Outcome Research at the Hospital for Special Surgery.
Dr. Marx currently serves on the board of directors of the International Society of Arthroscopy, Knee Surgery and Orthopedic Sports Medicine (ISAKOS). Comprised of surgeons from 92 countries worldwide, ISAKOS develops, supports and promotes charitable, scientific and literary works regarding arthroscopy, knee surgery and orthopedic sports medicine.

Invited Lecturer

Dr. Marx has been invited to lecture in Austria, Brazil, Canada, Greece, Israel, Italy, Portugal, Japan, Norway, Switzerland and New Zealand, where he has shared his knowledge on advanced orthopedic topics with hundreds of physicians and health care professionals. He has been invited to lecture as visiting professor of orthopedic surgery at many academic institutions, including Harvard University, The Mayo Clinic and his alma mater, The University of Toronto.

Clinical Trials

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Dr. Robert Marx, Orthopedic Surgeon

Contact Information

Office Locations

River Terrace
Suite 206
519 East 72nd Street
New York, NY 10021

Tel: 212.606.1645
Fax: 212.774.7822

Stamford, CT Office:
1 Blachley Road
Stamford, CT 06902

Mailing Address

Hospital for Special Surgery
535 East 70th Street
New York, New York 10021

Back in the Game Patient Stories:

Dr. Marx in the News: