Dr Julian Sonnenfeld | Orthopedic Surgeon Queens

Dr. Sonnenfeld is a fellowship-trained, board certified orthopedic surgeon at Orlin & Cohen Orthopedic Group and Northwell Health. He specializes in shoulder surgery and sports medicine, including arthroscopic and open surgeries of the shoulder, elbow and knee.

Education

High Technology High School Lincroft, NJ

2003 – 2007

Bachelor of Arts, Biology/Science in Society
Phi Beta Kappa Wesleyan University Middletown, CT

2007 – 2011

Doctor of Medicine
Alpha Omega Alpha, Honos Civicus Tufts University School of Medicine Boston, MA

08/2011 – 05/2015
Post-doctoral Training

Internship in General Surgery
New York Presbyterian/Columbia University Medical Center New York, NY
Director: Tracy Arnell, MD

06/2015 – 06/2016

Residency in Orthopaedic Surgery
New York Presbyterian/Columbia University Medical Center New York, NY
Chairman: William N. Levine, MD Residency Director: Charles M. Jobin, MD

06/2016 – 06/2020

Certificate of Training in Basic Microsurgery
New York Presbyterian/Columbia University Medical Center New York, NY
Director: Yelena Akelina, DVM

09/2018

Fellowship in Sports Medicine & Shoulder/Elbow Surgery
OrthoCarolina Charlotte, NC
Fellowship Director: James E. Fleischli, MD

08/2020 – 08/2021
Awards & Honors

All-NESCAC Baseball Team
3 consecutive years, Wesleyan University Baseball Middletown, CT

2009, 2010, 2011

All-New England Div. III Baseball Team, NEIBA
Wesleyan University Baseball Middletown, CT

2010

National Statistical Champion (doubles per game), NCAA Div. III Wesleyan University Baseball
Middletown, CT

2010

Academic All-American, CoSIDA/ESPN the Magazine
Wesleyan University Baseball Middletown, CT

2010

Roger Maynard Award for Men’s Athletics, Wesleyan University Awarded to most accomplished senior male scholar-athlete Middletown, CT

2011

Career Record Holder for Doubles (total and seasonal) and Runs Scored (total and seasonal) Wesleyan University Baseball Middletown, CT

2011 – present

Alpha Omega Alpha
Tufts University School of Medicine Boston, MA

2015

Honos Civicus Society
Recognizes graduating medical students who have demonstrated an exceptional commitment to community service and civic engagement Tufts University School of Medicine
Boston, MA

2015

Administrative Chief Resident of Sports Medicine Department of Orthopaedic Surgery
New York Orthopaedic Hospital/Columbia University Medical Center

2019 – 2020

Administrative Chief Resident of Curriculum and Education Department of Orthopaedic Surgery
New York Orthopaedic Hospital/Columbia University Medical Center

2019 – 2020

Ira Wolfe Award for Excellence in Sports Medicine Research Department of Orthopaedic Surgery
New York Orthopaedic Hospital/Columbia University Medical Center

2020
Team & Event Coverage

Resident Team Physician
Columbia University Athletics, New York, NY

2016 – 2020

Resident Team Physician
North Bergen High School Football, North Bergen, NJ

2017 – 2020

Resident Team Physician
Fordham University, Basketball, Bronx, NY

2017 – 2020

Resident Team Physician
Fordham University, Football, Bronx, NY

2017 – 2020

Resident Team Physician
Rockland Boulders, Can-Am Baseball League, Pamona, NY

2017 – 2020

Resident Team Physician
Hawthorne High School Football, Hawthorne, NJ

2017 – 2020

Resident Team Physician
New York Streets Arena Football, Westchester, NY

2019 – 2020

Resident Team Physician
Emerson High School Football, Emerson, NJ

2019 – 2020

Resident Team Physician
Fordham Preparatory High School Football, Bronx, NY

2019 – 2020

J.P Morgan Tournament of Champions, Professional Squash Association (PSA)
Grand Central Terminal, New York, NY

2020

Fellow Team Physician
Davidson College Athletics, Davidson, NC

2020 – 2021

Fellow Team Physician
Charlotte Knights, MiLB, Charlotte, NC

2020 – 2021

Fellow Team Physician
Carolina Panthers, NFL, Charlotte, NC

2020 – 2021
Professional Societies

American Medical Association (AMA)

2015 – present

American Omega Alpha Honor Medical Society

2015 – present

American Academy of Orthopaedic Surgeons (AAOS)

2016 – present

Arthroscopy Association of North America (AANA)

2018 – present

International Society of Arthroscopy, Knee Surgery and Orthopaedic Sports Medicine (ISAKOS)

2019 – present

Society of the American Shoulder and Elbow Surgeons (ASES)

2020 – present

American Orthopaedic Society for Sports Medicine (AOSSM)

2020 – present
International Outreach

Tufts in Haiti 9-week Program
CRUDEM Foundation
Tufts University School of Medicine Milot, Haiti; Boston, MA

2012

Foundation for Orthopedic Trauma (FOT) Mission Trip to Haiti
Team Leader: Dr. Melvin Rosenwasser Haiti Adventist Hospital
Port-Au-Prince, Haiti

2020
Volunteer Involvement

Reviewer
American Journal of Sports Medicine

Reviewer
Journal of Shoulder and Elbow Surgery

2020 – present

Committee Member
Student Health Advisory Committee Wesleyan University
Middletown, CT

2008 – 2011

Vice President
American Medical Student Association Wesleyan University
Middletown, CT

2008 – 2011

Executive Medical Board The Sharewood Project
Tufts University School of Medicine Malden, MA

2011 – 2012
Collegiate Athletics

Baseball, Wesleyan University, New England Small College Athletic Conference, Captain
Middletown, CT

2007 – 2011

Baseball, New England Collegiate Baseball League, Newport Gulls and Holyoke Blue Sox
Newport, Rhode Island; Holyoke, MA

2010

Research Experience

Research Assistant, Department of Neuroscience & Behavior Medicine
Wesleyan University Middletown, CT
PI: Gloster B. Aaron, Ph.D.

2008 – 2011

Public Health Research Assistant, Tufts in Haiti Program, Department of Epidemiology and Public Health
Tufts University School of Medicine Boston, MA
PI: Marnie Rosenthal, M.D. & Janet Forrester, Ph. D.

2012

Laboratory Assistant, Department of Thoracic Surgery Harvard University, Brigham & Women’s Hospital Boston, MA
PI: Assunta De Rienzo, Ph.D. & Raphael Bueno, M.D.

2012 – 2013
Research Support/grants
1. Sonnenfeld J, Trofa DP, Lynch TS, Ahmad CS. The Baseball Hitter’s Swing: An Analysis of Hip Motion and Kinematics. OSRF Grant. $7,410. (2017).
2. Sonnenfeld J, Geller J. Development of a virtual PCL model using cadaver Stryker Orthopaedics Resident and Fellow Research Program. (2017).
3. Trofa DP, Sonnenfeld J, Popa G, Ahmad CS. Magnetic Resonance Imaging after Ulnar Collateral Ligament Repair. OSRF Grant. $5,000. (2017).
Peer-reviewed Publications
1. Walker J, Storch G, Quach-Wong B, Sonnenfeld J, Aaron G. (2012). Propagation of Epileptiform Events across the Corpus Callosum in a Cingulate Cortical Slice Preparation. PLoS ONE 7(2): e31415. doi:10.1371/journal.pone.0031415.
2. Rosenthal M, Mediavilla J, Chen L, Sonnenfeld J, Pierce L, Shannon A, Boucher H, Pearlmutter M, Kreiswirth B, Kuo Y, Previl H, Rojtman A. (2014). Molecular Epidemiology of Staphylococcus aureus in post-earthquake Northern Haiti. International Journal of Infectious Diseases; 29: 146-151.
3. Pierce L, Shannon A, Sonnenfeld J, Pearlmutter M, Previl H, Forrester J. (2014). Hypertension Prevalence and Knowledge Assessment in Rural Haiti. Ethnicity & Disease; 24(2): 213-9.
4. Greisberg J, Sonnenfeld J. The Posterior Approaches to the Posterior Pilon Fracture. (2018).
  Techniques in Foot & Ankle Surgery. January 19, 2018 - Volume Publish Ahead of Print - Issue
  – p. doi: 10.1097/BTF.0000000000000183.
5. Trofa DP, Sonnenfeld J, Song DJ, Lynch TS. Distal Medial Collateral Ligament Repair with Suture Augmentation. (2018). Article in Press; published online August 13, 2018. Arthroscopy Techniques. DOI: https://doi.org/10.1016/j.eats.2018.05.001.
6. Sonnenfeld J, Trofa DP, Mehta M, Steinl G, Lynch TS. Hip Arthroscopy in Femoroacetabular Impingement. (2018). JBJS Essential Surgical Techniques – Subspecialty Procedures; Volume 8(3): e23. doi: 2106/JBJS.ST.18.00043.
7. Sonnenfeld J, Trofa DP, Westermann R, Hagen M, Rosneck J, Lynch TS. Outcomes measures in Hip Arthroscopy. Journal of Hip Surgery. 2018; 02(04): 167-175.
8. Lee D, Trofa DP, Grosso MJ, Sonnenfeld J, Cooper HJ, Shah RP, Geller JA. Incidence of Femoral Malrotation Using Posterior Condylar Referencing in Total Knee Arthroplasty. (2019). Journal of Knee Surgery. DOI: 1055/s-0039-1688931.
9. Lightsey H, Trofa DP, Sonnenfeld J, Swindell HW, Makhni EC, Ahmad CS. Rehabilitation Variability After Elbow Ulnar Collateral Ligament Reconstruction. Orthopaedic Journal of Sports Medicine. 2019 Mar; 7(3):
10. Alrabaa RG, Sonnenfeld J, Trofa DP, Ahmad CS. Elbow Common Flexor Tendon Repair Technique. Arthroscopy Techniques. 2019, Volume 8, Issue 11, Pages e1367–e1371.
11. Bixby E, Sonnenfeld J, Alrabaa RG, Trofa DP, Jobin CM. Partial Humeral Head Resurfacing for Avascular Necrosis. (2019). Arthroscopy Techniques.
12. Swindell H, Boddapati V, Sonnenfeld J, Trofa DP, Fleischli J, Ahmad CS, Popkin C. Increased Surgical Duration Associated with Prolonged Hospital Stay Following Isolated Posterior Cruciate Ligament Reconstruction. Therapeutics and Clinical Risk Management. 2019; 15: 1417–1425.
13. Sarpong N, Sonnenfeld J, LiArno S, Rajaravivarma R, Donde S, Sneddon E, Kaverina T, Cooper HJ, Geller J, Shah R. Virtual Reconstruction of the Posterior Cruciate Ligament for Mechanical Testing of Total Knee Arthroplasty Implants. The Knee. 2020; 27(1):151-156. doi: 10.1016/j.knee.2019.10.023.
14. Swindell H, Sonnenfeld J, Trofa D, Confino J, Alexander F, Ahmad C. Performance in Collegiate Level Baseball Players After Elbow Ulnar Collateral Ligament Orthopaedic Journal of Sports Medicine. 2020; 8(4):2325967120913013. doi: 10.1177/2325967120913013.
15. Swindell H, Sonnenfeld J, Trofa D, Salztman B, Alexander F, Ahmad CS. Nonoperative Management of Ulnar Collateral Ligament Injuries. JAAOS Global Research & Reviews.
Book Chapters
1. Sonnenfeld J, Shiu B, Levine WN: Two-Incision Distal Biceps Repair. IN: Illustrated Tips and Tricks in Sports Medicine Surgery. (Henley M, Azar F – Editors). Wolters Kluwer. Chapter 28, pp 217-223, 2018.
2. Levine WN, Sonnenfeld J, Shiu B. Shoulder Instability: Common Problems & Solutions. IN: Clinics in Sports Medicine: Common Procedures—Common Problems. (Miller M – Editor). Elsevier, pp 161-177,
Posters/Exhibits/Abstracts
1. Sonnenfeld J, Pierce L, Shannon A. (2012, November) Hypertension prevalence and knowledge assessment in rural Haiti. Poster presented at the Charlton Poster Competition, Sackler School of Graduate Biomedical Sciences, Tufts University, Boston,
2. Sonnenfeld J, Pierce L, Shannon A. (2013, March). Hypertension prevalence and knowledge assessment in rural Haiti. Poster presented at the annual Consortium of Universities for Global Health Conference, Washington, C.
3. Sonnenfeld J, Pierce L, Shannon A. (2013, April). Hypertension prevalence and knowledge assessment in rural Haiti. Poster presented at the annual Unite For Sight's Global Health & Innovation Conference, Yale University, New Haven,
4. Cooper HJ, Shah RP, Grosso MJ, Jang E, Hickernell T, Sonnenfeld J, Lakra A, Murtaugh T, Geller JA. Evidence-Based Techniques to Decrease Risk of Surgical Site Infection and Optimize Surgical Outcomes through Surgical Incision Management. Scientific Exhibit. American Academy of Orthopaedic Surgeons (AAOS) Annual Meeting. New Orleans, LA,
5. Lynch TS, Sonnenfeld J, Irvin J, O’Connor M, Ahmad CS. The Baseball Athlete From the Hips to the Fingertips: Injury Evaluation, Treatment and Prevention. Scientific Exhibit. American Academy of Orthopaedic Surgeons (AAOS) Annual Meeting. Las Vegas, NV, 2019.
6. Vance D, Wright M, Dennis E, Sonnenfeld J, Redler L, Popkin C, Ahmad CS, Belkin N. Treatment Options for Focal Articular Cartilage Lesions of the Knee. Scientific Exhibit. American Academy of Orthopaedic Surgeons (AAOS) Annual Meeting. Las Vegas, NV,
7. Sonnenfeld J, Sarpong N, LiArno S, Rajaravivarma R, Donde S, Sneddon E, Kaverina T, Geller J, Shah R. Virtual Reconstruction of the Posterior Cruciate Ligament for Mechanical Testing of the Knee. (2018). Orthopaedic Research Society, Austin, TX,
8. Sneddon E, Sonnenfeld J, Sarpong N, LiArno S, Rajaravivarma R, Donde S, Kaverina T, Geller J, Shah R. The Impact of Posterior Cruciate Ligament Tibial Insertion on Knee Kinematics. (2018). Orthopaedic Research Society, Austin, TX,
9. Sonnenfeld J, Sarpong N, LiArno S, Rajaravivarma R, Donde S, Sneddon E, Kaverina T, Geller J, Shah R. Virtual Reconstruction of the Posterior Cruciate Ligament for Mechanical Testing of the Knee. (2018). International Society of Arthroscopy, Knee Surgery & Orthopaedic Sports Medicine 12^th Biennial Congress, Cancun, Mexico,
10. Swindell H, Boddapati V, Sonnenfeld J, Trofa DP, Fleischli J, Ahmad CS, Popkin C. Prolonged Hospital Stay Following Isolated Posterior Cruciate Ligament Reconstruction. (2018). Eastern Orthopedic Association 50^th Annual Meeting, Palm Beach, FL,
11. LiArno S, Sonnenfeld J, Sarpong N, Rajaravivarma R, Donde S, Sneddon E, Kaverina T, Geller J, Shah R. Virtual Reconstruction of the Posterior Cruciate Ligament for Mechanical Testing of the Knee. (2018). European Knee Society Arthroplasty Conference, Valencia, Spain,
12. Sonnenfeld J, Sarpong N, LiArno S, Rajaravivarma R, Donde S, Sneddon E, Kaverina T, Geller J, Shah R. Virtual Reconstruction of the Posterior Cruciate Ligament for Mechanical Testing of the Knee. 20th EFORT Congress, Lisbon, Portugal,
13. Sneddon E, Sonnenfeld J, Sarpong N, LiArno S, Rajaravivarma R, Donde S, Kaverina T, Geller J, Shah R. The Impact of Posterior Cruciate Ligament Tibial Insertion on Knee Kinematics. 20th EFORT Congress, Lisbon, Portugal, 2019.
14. Sarpong NO, Sonnenfeld J, LiArno S, Rajaravivarma R, Donde S, Sneddon E, Kaverina T, Coury J, Cooper HJ, Shah RP, Geller JA. Virtual reconstruction of the posterior cruciate ligament for mechanical testing of total knee arthroplasty implants. International Society for Technology in Arthroplasty Annual Meeting. Toronto, Canada, October
15. Sonnenfeld J, Crutchfield C, Swindell H, Schwarz W, Trofa DP, Ahmad CS, Lynch TS. An Analysis of In Vivo Hip Kinematics of the Elite High School and Collegiate Baseball Batter Utilizing a Novel Markerless Capture System. AOSSM Annual Meeting 2021. (Submitted for review, 2020).
16. Sonnenfeld J, Crutchfield C, Swindell H, Schwarz W, Trofa DP, Ahmad CS, Lynch TS. An Analysis of In Vivo Hip Kinematics of the Elite High School and Collegiate Baseball Batter Utilizing a Novel Markerless Capture System. AAOS Annual Meeting 2021. (Submitted for review, 2020).
17. Sonnenfeld J, Crutchfield C, Swindell H, Schwarz W, Trofa DP, Ahmad CS, Lynch TS. An Analysis of In Vivo Hip Kinematics of the Elite High School and Collegiate Baseball Batter Utilizing a Novel Markerless Capture System. American Journal of Sports Medicine. (Submitted for review, 2020).
18. Sonnenfeld J, Crutchfield CR, Swindell HW, Schwarz WJ, Trofa DP, Ahmad CS, Lynch
19. An analysis of in vivo hip kinematics in elite baseball batters utilizing a markerless motion- capture system. Annual Injury Prevention Symposium. Vail, CO, United States of America. April 2021.
Multimedia/Other
1. Sonnenfeld J, Song DJ, Grogan BF, Ahmad CS. Interstitial Rotator Cuff Repair. (2018). https://www.vumedi.com/video/interstitial-rotator-cuff-repair/
2. Sonnenfeld J, Song DJ, Popa G, Ahmad CS. Glenoid Osteochondral Defect Drilling for Marrow Stimulation. VuMedi. (2018). https://vumedi.com/video/glenoid-ocd-drilling-for-marrow- stimulation/
3. Trofa DP, Sonnenfeld J, Song DJ, Lynch TS. Distal Medial Collateral Ligament Repair with Suture Augmentation. VuMedi. (2018). https://vumedi.com/video/distal-medial-collateral- ligament-repair-with-suture-augmentation/
4. Sonnenfeld J, Trofa DP, Popa G, Ahmad CS. Elbow Flexor Pronator Tendon Repair. (2018). https://www.vumedi.com/video/elbow-flexor-pronator-tendon-repair/
5. Sonnenfeld J, Trofa DP, Song DJ, Popa G, Ahmad CS. Repair of Medial Collateral Ligament with Internal Bracing. VuMedi. (2018). https://vumedi.com/video/repair-of-medial- collateral-ligament-with-internal-bracing/
6. Sonnenfeld J, Trofa DP, Song DJ, Popa G, Ahmad CS. Medial Meniscus Repair with Concomitant ACL Reconstruction. VuMedi. (2018). https://vumedi.com/video/medial- meniscus-repair-with-concomitant-acl-reconstruction/
7. Sonnenfeld J, Lombardi JM, Trofa DP, Popa G, Ahmad CS. ACL Revision Reconstruction with Quadriceps Tendon Autograft, and ALL reconstruction. VuMedi. (2018). https://vumedi.com/video/acl-revision-reconstruction-with-quad-tendon-autograft-all- reconstruction/
8. Sonnenfeld J, Trofa DP, Anderson MJ, Popa G, Constant M, Ahmad CS. Open Repair of the Flexor Pronator Tendon for Recalcitrant Medial Epicondylitis. AAOS – Orthopedic Video Theater. [2018, provisionally accepted]. Las Vegas, NV. March
9. Sonnenfeld J, Trofa DP, Swindell H, Popa G, Ahmad CS. Repair of the Medial Collateral Ligament of the Knee with Internal Bracing. AAOS – Orthopedic Video Theater. [2018, provisionally accepted]. Las Vegas, NV. March
10. Sonnenfeld J, Trofa DP, Anderson F, Popa G, Ahmad CS. Repair of Medial Meniscus with Concomitant Anterior Cruciate Ligament Reconstruction. AAOS – Orthopedic Video [2018, provisionally accepted]. Las Vegas, NV. March 2019.
11. Sonnenfeld J, Lombardi JM, Trofa DP, Anderson F, Popa G, Ahmad CS. ACL Revision Anterior Cruciate Ligament Reconstruction with Quadriceps Tendon Autograft & Anterolateral Ligament Reconstruction in a Pediatric Patient. POSNA Video Abstract Theatre. [2018, provisionally accepted]. Charlotte, NC. May
12. Sonnenfeld J, Alrabaa R, Jobin C. Humeral Head Resurfacing for Corticosteroid Induced Avascular Necrosis. VuMedi. (2019). https://vumedi.com/video/humeral-head-resurfacing- for-corticosteroid-induced-avascular-necrosis/
13. Sonnenfeld J, Alrabaa R, Popa G, Ahmad CS. Arthroscopic SLAP Repair, Labral Repair, and Biceps Tenodesis in a Competitive Baseball Player. VuMedi. (2019).
14. Sonnenfeld J, Alrabaa R, Popa G, Ahmad CS. Medial Patellofemoral Ligament Reconstruction with Treatment of Patellar Chondral Defect. VuMedi. (2019). https://vumedi.com/video/mpfl-medial-patellofemoral-ligament-reconstruction- arthroscopic-lateral-retinacular-release-and-trea/
15. Sonnenfeld J, Song DJ, Popa G, Ahmad CS. Glenoid Osteochondral Defect Drilling for Marrow Stimulation. AAOS – Orthopedic Video Theater. (2019).
16. Sonnenfeld J, Anderson MA, Trofa DP, Swindell H, Popa G, Ahmad CS. Arthroscopic Interstitial Rotator Cuff Repair with Positive Bubble Sign. AAOS – Orthopedic Video Theater (2019).
17. Swindell H, Sonnenfeld J, Lopez C, Jobin CM. Arthroscopic Augmentation of a Posterior Glenoid Defect with Iliac Crest Autograft. AAOS – Orthopedic Video Theater (2020).
18. Swindell H, Sonnenfeld J, Knudsen M, Trofa DP, Popa G, Ahmad CS. Revision Ulnar Collateral Ligament Reconstruction with Hamstring Autograft. AAOS – Orthopedic Video Theater (2020).
19. Swindell H, Sonnenfeld J, Lopez C, Jobin CM, Ahmad CS. Arthroscopic Treatment of a Bennett Lesion in a Baseball Pitcher. AAOS – Orthopedic Video Theater (2020).
20. Konigsberg M, Sonnenfeld J, Kadiyala RK. Thumb Ulnar Collateral Ligament Repair with Suture Anchor Fixation. VuMedi. (2020). https://vumedi.com/video/thumb-ulnar- collateral-ligament-repair-with-suture-anchor-fixation-2/
Presentations
1. Pearlmutter M, Sonnenfeld J, Greenwald S, Westfal M, Brant-Zawadzki G. (2012, November). Experiences in Haiti: Disasters, emergencies, public health and beyond. Address to the Tufts International Emergency Medicine and Global Health Symposium, Boston,
2. Rosenthal M, Sonnenfeld J, Pierce L, Shannon A, Mediavilla J, Pearlmutter M, Kreiswirth B, Rojtman A. (2013, June). Molecular epidemiology of staphylococcus aureus in post-earthquake Haiti. Meridian Health Research Day, Jersey Shore University Medical Center, Neptune,
3. Sonnenfeld J. (2015, March). Hypertension prevalence and knowledge assessment in rural Address to the Global Health Faculty Council, Global Health Seminar Series, Tufts University School of Medicine, Boston, MA.
Lectures/Grand Rounds
1. “Shoulder Arthroplasty Options for the Walch B2 Glenoid”. Fellows Conference. Department of Sports Medicine, Shoulder & Elbow Surgery. OrthoCarolina – March 5,
2. “Superior Capsular Reconstruction Indications and Controversy.” Fellows Conference. Department of Sports Medicine, Shoulder & Elbow Surgery. OrthoCarolina – October 16,
3. “Treatment of Irreparable Rotator Cuff Tears.” Shoulder and Elbow Service Grand Rounds. New York Presbyterian Hospital/Columbia University Medical Center – December 13,
4. “Scapula Fractures.” Fracture Service Grand Rounds. New York Presbyterian Hospital/Columbia University Medical Center – December 6,
5. “Medial Unicondylar Knee Arthroplasty in the ACL Deficient Knee”. Lower Extremity Arthroplasty Service Conference, Columbia University Medical Center, Department of Orthopaedic Surgery, November 21,
6. “Reverse Shoulder Arthroplasty Using Wedged Baseplate,” Techniques Conference, Shoulder and Sports Service, Columbia University Medical Center, Department of Orthopaedic Surgery, August 10,
7. “Collateral Ligament Injuries of the Thumb.” Hand and Upper Extremity Service Grand New York Presbyterian Hospital/Columbia University Medical Center – March 22, 2018.
8. “Interstitial Rotator Cuff Repair,” Techniques Conference, Shoulder and Sports Service, Columbia University Medical Center, Department of Orthopaedic Surgery, February 9,
9. “Total Hip Arthroplasty Instability.” Joints Service Grand Rounds. New York Presbyterian Hospital/Columbia University Medical Center – September 29,
10. “Patellar Fractures.” Fracture Service Grand Rounds. New York Presbyterian Hospital/Columbia University Medical Center – September 1,

Julian J. Sonnenfeld, M.D.