Michael J. Sileo, MD

Director of Sports Medicine
Board Certified Orthopedic Surgery & Sports Medicine
Arthroscopic Surgery of the Shoulder, Knee and Hip


  • Bio & Education

  • Specialties

  • Team

  • Locations

  • Media

  • Protocols

  • Publications

Dr. Sileo is a native of Garden City, Long Island and graduated magna cum laude from the College of William and Mary in Williamsburg, Virginia in 1998. He subsequently earned his medical degree at SUNY Stony Brook in 2002. His post-graduate training included a surgical internship and orthopedic surgery residency at SUNY Stony Brook, where he was selected by the faculty to serve as administrative chief resident his final year. He then completed a fellowship in sports medicine at the prestigious Lenox Hill Hospital in Manhattan, where he served as assistant team orthopedist to the New York Jets, New York Islanders, Hofstra University, and Hunter University. Dr. Sileo has published extensively on shoulder, knee, and ankle injuries including rotator cuff tears, shoulder instability, labral tears, complex knee ligamentous injuries, and achilles tears. He has presented his clinical research at both regional and national meetings. Dr. Sileo is board certified by the American Board of Orthopaedic Surgery for both Orthopedic Surgery and Sports Medicine, and is a Fellow of the American Academy of Orthopaedic Surgery (FAAOS).

Dr. Sileo has a particular interest in the care of both the competitive and recreational athlete. He is actively involved in the community, and can frequently be found taking care of athletes on the sideline of several local football teams. He specializes in the arthroscopic and minimally invasive treatment of shoulder, hip, knee, and elbow injuries, but has extensive experience in most areas of both operative and non-operative orthopedics. Dr. Sileo is one of the few orthopaedic surgeons in the tri-state area who routinely performs hip arthroscopy for the minimally invasive treatment of hip labral tears and femoroacetabular impingement. Dr. Sileo's practice emphasizes both rehabilitation as well as training to prevent sports related injuries. His other areas of interest include the treatment of cartilage and meniscal injuries, shoulder arthroplasty, and fracture care.

To learn more about Dr. Sileo, click here.


  • Rotator cuff repair
  • Labral repair
  • Shoulder instability
  • Bicep tendon tears
  • Shoulder impingement
  • Cartilage injuries
  • Shoulder arthritis
  • Fracture care


  • ACL tears
  • Ligament injuries
  • Meniscus tears
  • Cartilage injuries
  • Patella instability
  • Tendon injuries
  • Knee arthritis
  • Fracture care


  • Labral tears
  • Hip impingment
  • Cartilage injuries
  • Hip bursitis
  • Snapping hip
  • Gluteus tears
  • Hip arthritis
  • Fracture care


  • Bicep tears
  • Tennis elbow
  • Golfers elbow
  • Cartilage injuries
  • Ulnar collateral ligament tears

Richard Georges

Richard Georges is a board-certified Physician Assistant. He previously worked as a Physical Therapist Assistant in an outpatient physical therapy clinic that specialized in sports-medicine rehabilitation. He earned his Certificate in Physician Assistant Studies from Touro College in 2010.

In 2010, Richard joined Dr. Sileo’s practice. Richard routinely assists Dr. Sileo in the operating room, as well as in the office. He takes pride in helping patients to understand their orthopedic conditions, treatment, and rehabilitation.

Richard is a member of the American Academy of Physician Assistants and the American Organization of Physician Assistants who practice in Orthopaedic Surgery.

Ellie Antunovich

Ellie Antunovich is a native Long Islander. Ellie has been Dr. Sileo’s Team Office Manager since 2008, has worked for the practice for 13 years and has 20 years of medical experience. Ellie has 3 children and 7 young grandchildren. Outside of work, Ellie enjoys spending time with the family, walking on the beach, and traveling.

Julie O’Ferral

Julie O’Ferral is a native Long Islander.  She has worked in the medical field on LI for 25 years.  Julie has  worked as Dr. Sileo’s front desk receptionist for 7 years, and presently as his Administrative Assistant for the last year.  Julie and her husband have a large family between them both, and enjoy traveling to visit family in various states.  She also enjoys gardening, and just relaxing when she gets a chance.

East Setauket

6 Technology Drive
East Setauket, New York 11733


500 Commack Road
Suite 150B
Commack, NY 11725


74 Commerce Drive
Suite 4
Riverhead, NY 11901

Post Op Protocols

  • Post Op Instruction Sheet
  • Post Op Hip Scope
  • Post Op Knee Arthroscopy
  • Post Op Shoulder Arthroscopy RTC Repair
  • Post Op Shoulder Labral Repair

Sileo MJ, Ruotolo CR, Nelson CO, Serra-Hsu F, Panchal AP. “A Biomechanical Comparison of the Modified Mason-Allen Stitch and Massive Cuff Stitch In Vitro.” Arthroscopy 2007 Mar;23(3):235-240.e2

Nelson CO, Sileo MJ, Grossman MG, Serra-Hsu F. “Single-row modified mason-allen versus double-row arthroscopic rotator cuff repair: a biomechanical and surface area comparison.” Arthroscopy 2008 Aug;24(8):941-8

Nelson CO, Sileo MJ, Grossman MG, Serra-Hsu F. “Single-row modified mason-allen versus double-row arthroscopic rotator cuff repair: a biomechanical and surface area comparison.” Arthroscopy 2008 Aug;24(8):941-8

Penna J, Deramo D, Nelson CO, Sileo MJ, Levin SM, Tompkins B, Ianuzzi A. “Determination of anterior labral stress during passive arm motion in a cadaveric model.” Arthroscopy 2008 Aug;24(8):930-5

Sileo MJ, Hurst LC, Liang SX. “Digital Angioleiomyoma: A Case Report and Review of the Literature.” J. Orthopaedics 2008; 5(2)e2

Sileo MJ, Lee SJ, Kremenic IJ, Orishimo K, Ben-Avi S, McHugh M, Nicholas SJ. “Biomechanical comparison of knotless suture anchor to standard suture anchor in the repair of type II SLAP tears.” Arthroscopy 2009 Apr;25(4):348-354

Lee SJ, Sileo MJ, Kremenic IJ, Orishimo K, Ben-Avi S, Nicholas SJ, McHugh M. “Cyclic loading of three Achilles tendon repairs simulating early postoperative forces.” Am J Sports Med 2009 Apr;37(4):786-790

Sileo MJ, Schwartz M. “Isolated rupture of the popliteus muscle with painful ossification in a skeletally immature athlete: A case report.” Bull NYU Hosp. Jt. Dis. 2009;67(4):387-90

Testimonial Stories


Office Locations - Blue Surgery Locations: Green Outpatient Rehabilitation Locations: Red