About Peter Asnis, MD

Dr. Asnis specializes in knee and shoulder sports injuries. He sees patients of all ages, from adolescents to adults, and he helps them work toward their desired performance level.

Dr. Peter Asnis earned his undergraduate degree cum laude in biology at Harvard College and his MD from Cornell University Medical School with Honors in Research. After finishing a general surgery internship at New York Presbyterian Hospital, Dr. Asnis completed his orthopaedic residency at the Hospital for Special Surgery in New York where he was awarded the Jean C. McDaniel Resident Teaching and Leadership Award. Dr. Asnis completed a fellowship in Orthopaedic Sports Medicine at Mass General, and following his fellowship, he joined the MGH staff.

Dr. Asnis is the Head Team Orthopaedic Surgeon for the Boston Red Sox, Head Team Physician for the Boston Bruins and is a Team Physician for the New England Patriots.

Dr. Asnis is an Assistant Professor of Orthopaedic Surgery at Harvard Medical School. He is a Fellow of the American Academy of Orthopaedic Surgeons as well as a Member of the American Orthopaedic Society for Sports Medicine. He is a member of the Team Physician Societies for the NFL, NHL and MLB.

Departments, Centers, & Programs:

Clinical Interests:



Sports Medicine Service
Charles River Plaza
175 Cambridge St., 4th Floor
Boston, MA 02114
Phone: 617-726-7500

Sports Medicine at Mass General Waltham
52 Second Ave.
3rd Floor, Suite 3300
Waltham, MA 02451
Phone: 617-726-7500

Medical Education

  • MD, Cornell University Medical College
  • Residency, Hospital for Special Surgery
  • Fellowship, Massachusetts General Hospital

American Board Certifications

  • Orthopaedic Sports Medicine, American Board of Orthopaedic Surgery
  • Orthopaedic Surgery, American Board of Orthopaedic Surgery

Accepted Insurance Plans

Note: This provider may accept more insurance plans than shown; please call the practice to find out if your plan is accepted.


Dr. Asnis' research interests are focused on the knee and shoulder, particularly on how to optimize treatment for active patients who have suffered sports-related injuries.

Dr. Asnis collaborates with the Orthopaedic Bioengineering Lab at MGH in many of his research projects. Some of his most recent publications have focused on anatomic and radiographic studies of pathologies of the hip and knee.


  • Select Publications:

    • Hazzard S, Connolly S, Wiater A, et al. Establishing Normal Variances and Expectations for Quadriceps Limb Symmetry Index Benchmarks Based on Time from Surgery After Anterior Cruciate Ligament Reconstruction. IJSPT. 2024;19(4):410-417.Hazzard S, Bacevich B, Perry N, Nukala V, Asnis, P; Anterior Cruciate Ligament Reconstruction Using Allograft in Adults Older Than the Age of 40 Years Shows Similar Patient-Reported Outcomes Between Male and Female Patients, Arthroscopy, Sports Medicine, and Rehabilitation, Vol 6 Iss 2, April 2024.
    • Velasquez Hammerle M, Asnis P, Hazzard S, Babu A, Berkson E, Borgstrom H, Flora J, Ginsburg R, McInnis K, Nukala V, Tanaka M, Who and When should we screen? Assessing the need for psychological support in patients with sports injuries in the setting of an orthopedic surgery outpatient clinic, International Society of Arthroscopy, Knee Surgery and Orthopaedic Sports Medicine (ISAKOS) June 2023 conference abstract podium presentation.
    • Leite C, Farina E, Gortz S, Hazzard S, Asnis P, Lattermann C, Smith R, Merkely G, Increased Tibiofemoral rotation angle is associated with graft failure after anterior cruciate ligament reconstruction, The American Journal of Sports Medicine. 2023;51(9):2291-2299.
    • Hazzard S, Velasquez Hammerle M, Asnis P, Tanaka M, Prevalence and Severity Of Anterior Knee Symptoms after ACL Reconstruction Using BTB Autograft vs BTB Allograft, International Society of Arthroscopy, Knee Surgery and Orthopaedic Sports Medicine (ISAKOS) June 2023 conference abstract podium presentation.
    • Hazzard S, McLaughlin A, Cacace H, Nukala V, Asnis P, Tramadol provides similar pain relief and a better side effect profile than oxycodone (or hydrocodone) alone or in combination with tramadol after anterior cruciate ligament reconstruction or arthroscopic knee debridement, Arthroscopy, Sports Medicine, and Rehabilitation, Vol 5, Iss 3, E765-E771, June 2023.
    • Asnis, P, Hazzard, S, Editorial Commentary: Exercise-Based Physical Therapy Was Not Inferior to Arthroscopic Partial Meniscectomy for Knee Function Over 5 Years in Adults with Degenerative Meniscal Tears. The Journal of Bone and Joint Surgery 105(4):p 321, February 15, 2023.
    • Hazzard S, Scarborough D, Berkson E, Asnis P, Fellow efficiency during anterior cruciate ligament reconstruction improves over time, yet is less than experienced physician assistant but with no significant difference in patient-reported outcomes, Arthroscopy, Sports Medicine, and Rehabilitation. 2022 Dec 23;5(1):e185-e192.
    • Cote M, Nolan D, Hazzard S, Waugh S, Asnis P, Editorial Commentary: Blood flow restriction therapy prior to anterior cruciate ligament reconstruction: small effects require accurate measurements, Arthroscopy, Feb 2023, Vol 39, Issue 2, p382-383.
    • Hazzard S, Lonati D, Kolosky M, Asnis P. Rule 50: A reproducible technique to minimize graft-tunnel mismatch during ACL reconstruction using bone-tendon-bone (BTB) graft. Techniques in Orthopaedics. Dec 2021; Vol 3, Issue 36, p445-448.

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