> Skip repeated content

Gregory S. DiFelice, MD

Orthopedic Surgery, Sports Medicine, Trauma

Gregory S. DiFelice, MD

525 East 68th Street, Starr 2
New York, NY 10021

Tel: 212.746.4993
Fax: 212.746.8744

Paramus Office
140 East Ridgewood Avenue
Suite 175 S.
Paramus, NJ 07652
525 East 68th Street, Starr 2
New York, NY 10021

Tel: 212.746.4993
Fax: 212.746.8744

Paramus Office
140 East Ridgewood Avenue
Suite 175 S.
Paramus, NJ 07652

Dr. Gregory S. DiFelice is a fellowship-trained orthopedic surgeon specializing in sports traumatology and joint reconstruction surgery at Hospital for Special Surgery (HSS) and NewYork-Presbyterian Hospital. He also holds an appointment at Weill Cornell Medical College as an associate professor. Regional interests include the knee, shoulder and hip. He has particular interests in ligament reconstruction of the knee with extensive experience in multi-ligament reconstructions, cartilage and meniscal repair of the knee, arthroscopic shoulder surgery including labral and rotator cuff repairs, and arthroplasty of the knee, shoulder and hip. He frequently lectures on these interests both domestically and internationally.

Dr. DiFelice was born and raised in northern New Jersey. He completed his undergraduate degree at Princeton University while simultaneously earning 3 Varsity letters playing football. He then continued on to New Jersey Medical School where he graduated as a member of the Alpha Omega Alpha Medical Honor Society. He did his residency in orthopedic surgery at HSS. He then completed a fellowship in sports medicine at Washington University in St. Louis in 2000. While there, he worked as an assistant to the team physicians for the St. Louis Rams, the St. Louis Blues and the St. Louis Cardinals.

Since finishing his training, Dr. DiFelice has been the creator and Director for the Division of Sports Medicine and Joint Reconstruction Surgery for the North Bronx Healthcare Network, as well as an assistant professor of orthopedic surgery at the Albert Einstein College of Medicine. Prior to his recent return to HSS, he worked in conjunction with the Ranawat Orthopaedic Center at Lenox Hill Hospital.

Among his many accolades, Dr. DiFelice is also a member of numerous state and national medical societies. His athletic accomplishments are also numerous and range from Division I collegiate football to the US Rugby Super League and international rugby competitions. As such, patients of his can take comfort in knowing that they are not only being treated by an esteemed physician, but a fellow athlete as well.

Back in the Game Patient Stories


Associate Attending Orthopedic Surgeon, Hospital for Special Surgery
Associate Professor, Clinical Orthopedic Surgery, Weill Cornell Medical College
Associate Attending Orthopedic Surgeon, NewYork-Presbyterian Hospital


Special Expertise

Ligament reconstruction of the knee
Multi-ligament reconstructions
Cartilage and meniscal repair of the knee
Arthroscopic shoulder surgery
Labral and rotator cuff repairs
Arthroplasty of the knee, shoulder and hip

Watch Dr. DiFelice present his novel approach to ACL preservation


Knee Arthroscopy, Shoulder Arthroscopy, Knee Ligament Reconstruction & Repair, Meniscal & Cartilage Surgery, Rotator Cuff Repair, Joint Replacement Surgery of the Knee, Hip & Shoulder, Fracture Surgery, Tendon Repairs


Patient Choice Award - Vitals.com, 2008 & 2009
America's Top Orthopedists - Consumer Research Council of America, 2008 & 2009
Teacher of the Year Award - Montefiore Orthopaedic Residency Program 2002 & 2005


American Academy of Orthopaedic Surgeons
American Orthopaedic Society for Sports Medicine
American Association of Hip and Knee Surgeons
New York State Society of Orthopaedic Surgeons
Medical Society of the State of New York
Alpha Omega Alpha Medical Honor Society- NJ Beta Chapter



Insurance Information

Blue Cross Blue Shield PPO HMO POS
Oxford Medicare
United Healthcare

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


MD, UMDNJ- New Jersey Medical School, Newark, NJ/USA, 1994


General surgery, Santa Barbara Cottage Hospital, Santa Barbara, CA/USA, 1995


Orthopaedic Surgery, The Hospital for Special Surgery, New York, NY/USA, 1999


Sports Medicine, Washington University-Barnes Jewish Hospital, St. Louis, MO/USA, 2000


Board Certified, ABOS, July 2003

State Licensure

New York, New Jersey

Selected Books/Chapters

Paletta GA, DiFelice GS, Meunier MM. “Elbow Injury in the Adolescent Athlete.” in The Athlete’s Elbow, eds., Altchek, DW, Andrews, JR; Lippincott, Williams & Wilkins. 2001.

Selected Publications

Koenig JH, Ranawat AS, Umans HR, DiFelice GS. Meniscal Root Tears: Diagnosis and Treatment. Arthroscopy 2009; 25(9): 1025-32.

Ferrari L, Haynes P, Mack J, DiFelice GS. Intramuscular lipoma of the supraspinatus causing impingement syndrome: case report and review of literature. Orthopedics 2009; 32:601, Epub 2009 Aug 5.

DiFelice GS, Umans H, Englesohn E. All-inside, suture anchor repair for meniscal root tears. Knee Surg Sports Traumatol Arthosc. 2009 17(4):428-9. Epub 2009 Mar 7.

Ranawat AS, DiFelice GS, Suk M, Lorich DG, Helfet DL. Iatrogenic propagation of anterior fracture-dislocation of the proximal humerus: case series and literature review with suggested guidelines for treatment and prevention. Am J Orth Surgery. 2007 Sep;36(9):E133-7.

Schlossberg S, Umans H, Flusser G, DiFelice GS, Lerer DB. Bucket handle tears of the medial meniscus: meniscal intrusion rather than meniscal extrusion. Skeletal Radiol 2007; 36(1): 29-34. Epub 2006 Oct 19.

Engelsohn E, Umans H, DiFelice GS. Marginal Fractures of the Medial Tibial Plateau: Possible Association with Medial Meniscal Root Tear. Skeletal Radiol 2007; 36(1): 73-6. Epub 2006 Mar 29.

Paletta GA, Klepps SJ, DiFelice GS, Allen T, Brodt MD, Burns ME, Silva MJ, Wright RW. Biomechanical Evaluation of 2 Techniques for Ulnar Collateral Ligament Reconstruction of the Elbow. Am J Sports Med. 2006; 34(10):1599-1603.

Kuri JA, DiFelice GS. Acute Compartment Syndrome of the Thigh Following Rupture of the Quadriceps Tendon. A Case Report. J Bone Joint Surg Am. 2006; 88:418-420.

Wright RW, DiFelice GS, Phillips B, Paletta GA. Effort Thrombosis in the Elite Throwing Athlete. Am J Sports Med. 2002; 30(5):708-12.

DiFelice GS, Williams RJ, Warren RF, Cohen MS. The Accessory Posterior Portal for Shoulder Arthroscopy. Description of Technique and Cadaveric Study. Arthroscopy 2001; 17(8): 888-891.

DiFelice GS, O’Malley MJ. First Metatarsophalangeal Joint Replacement Arthroplasty. Seminars in Arthroplasty 1999, 10(2): 107-117.

Bartlett CS, DiFelice GS, Buly RL, Quinn TJ, Green DST, Helfet DL. Cardiac Arrest as a Result of Intraabdominal Extravasation of Fluid During Arthroscopic Removal Loose Body from the Hip Joint of a Patient with an Acetabular Fracture. Journal of Orthopedic Trauma 1998, 12(4): 294-9.

Cornell CN, DiFelice GS. Fracture Healing in Osteoporotic Bone. Current Opinions in Orthopaedics. 1996, 7;V: 12-15.

Selected Presentations

Suture Anchor Versus Drill Tunnel Primary ACL Repair: An In Vitro Comparison of Gap Formation, ISAKOS Congress, June 7-11, 2015.

ACL Preservation: Early Results of A Novel Arthroscopic Technique of Suture Anchor Primary ACL Repair, AANA Annual Meeting, April 23-25, 2015.

Knee Injuries in Athletes: Getting Patients Back in the Game. Rosemont, IL. April 8-10, 2010. Invited Instructor.

The Surgical Treatment of Knee Dislocations. Hospitale Mauriziano, Universita di Turino, Department of Orthopaedics and Traumotologie Grand Rounds. Director: Paolo Rossi. June 25, 2009.

Arthroscopy Association of North America Knee Ligament Course. Orthopaedic Learning Center, Rosemont, IL. Mar. 20-22, 2009. Associate Master Instructor.

Knee Injuries in Athletes: Getting Patients Back in the Game. Rosemont, IL. April 3-5, 2008. Invited Instructor.

Advances in Joint Replacement Surgery. Jaipur, India. Jan. 2005. Invited Instructor.

Research Interests

Ligament repair, all-inside reconstruction techniques, multi-ligamentous repair/reconstructions.
Graphic: Hide text


ACL injuries have become commonplace, along with its traditional treatment of reconstruction. According to Dr. Gregory DiFelice, orthopedic sports trauma surgeon at HSS, one size does not fit all for ACL tears. He has developed an innovative approach to repair the native ACL in tears where the ligament is largely intact, but has been torn from its bony attachment. His technique saves the patient's native anatomy which results in better outcomes. Watch exclusive footage of his patients who have undergone this technique, all of which are included in the new results that Dr. DiFelice just published. To view the study, please visit: http://www.sciencedirect.com/science/article/pii/S0749806315006647.

Watch Dr. DiFelice present his novel approach to ACL preservation