Ryan Halvorson, MD
Resident Physician
Orthopaedic Surgery
School of Medicine

Education & Training

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• Residency Orthopaedic Surgery UCSF 2027
• MD Medicine UCSF 2021
• SB Engineering Sciences Harvard 2017

Grants and Projects

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• A Mobile Application for Digitally Tracking and forecasting Patient-Centric Response to Musculoskeletal Treatment, UCSF Catalyst, 2023-2025
• Phenotyping Post-Operative ACL Recovery Trajectories, OREF, 2023-2025

Publications (45)

Top publication keywords:
Device RemovalBoxingTibial FracturesShoulder FracturesFracture Fixation, InternalShoulder JointArthroplasty, Replacement, ShoulderBone NailsKnee JointOssification, HeterotopicArthritisAthletic InjuriesPatient PortalsNewspapers as TopicClinical Decision-Making

• Radiographic findings after radial head replacement.
  Journal of orthopaedic surgery and research 2026 Lalchandani GR, Cherches M, Halvorson RT, Vykunta AB, Lattanza LL, Lee NH, Kandemir U
• Pain Management Strategies in Reverse Total Shoulder Arthroplasty.
  Current reviews in musculoskeletal medicine 2026 David WB, Sang L, Halvorson RT, Feeley BT
• Climate change and the operating room: perceptions of orthopaedic surgeons on environmental sustainability.
  BMJ leader 2026 Nosrat C, Foley A, Halvorson RT, Swarup I
• Deriving the OTA/AO fracture classification from routinely collected radiology reports using a large language model.
  OTA international : the open access journal of orthopaedic trauma 2026 Hu S, Keeley T, Halvorson R, Campbell ST, Lefaivre KA, Levack A, Lundy DW, Meinberg E, Schweser K, Shymon SJ, Marmor MT
• Patient Digital Engagement With After Visit Summary in Ambulatory Care.
  JAMA network open 2026 Halvorson RT, Wang S, Wong L, Vasanthan A, Thombley R, Feeley BT, Holmgren AJ

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• Validating Single-Camera Pose Estimation Against Multi-Camera Motion Capture for Accessible Biomechanical Assessment.
  IEEE access : practical innovations, open solutions 2026 Pratapneni A, Halvorson R, Silvestros P, Harris N, Bailey JF
• Large Language Model Predicts Surgeon Recommendations for Imaging and Surgery for Patients Presenting for Knee and Shoulder Complaints With 70% and 81% Accuracy Using Previsit Questionnaire Responses.
  Arthroscopy : the journal of arthroscopic & related surgery : official publication of the Arthroscopy Association of North America and the International Arthroscopy Association 2026 Halvorson RT, Keeley T, Niknam K, Zack T, Majumdar S, Feeley BT, Zhang AL, Lansdown DA
• The effect of baseline spinal magnetic resonance imaging features on restorative neurostimulation efficacy in patients with chronic low back pain.
  Journal of spine surgery (Hong Kong) 2025 Dziesinski LK, Halvorson RT, Langhorst M, Klemme WR, Berven SH, Lafage V, Schwab F, Lotz JC, Torres-Espin A, Bailey JF
• Return To Sport Following ACL Reconstruction.
  Current reviews in musculoskeletal medicine 2025 Foley A, Confino J, Halvorson R, Petrie K, Torres A, Feeley B
• Nationwide Database Analysis Shows Proximal Hamstring Repair in Adult Patients Is Associated With Lower Failure and Complication Rates Than Reconstruction.
  Arthroscopy : the journal of arthroscopic & related surgery : official publication of the Arthroscopy Association of North America and the International Arthroscopy Association 2025 Wang SJ, Halvorson RT, Chung J, Yu R, Ma CB, Wong SE, Zhang AL
• Restoration of Hip Kinematics After Arthroscopy for Femoroacetabular Impingement Syndrome: A 1-Year Evaluation of Gait and Stair Performance.
  Orthopaedic journal of sports medicine 2025 Garcia-Lopez E, Halvorson RT, Foley AJ, Zhang AL, Wong SE
• 3D motion capture data into a kinematic composite score for assessing musculoskeletal impairments.
  Journal of biomechanics 2025 Archibeck E, Halvorson R, Silvestros P, Torres-Espin A, O'Connell G, Bailey J
• Early Biomechanical Recovery Following Total Hip Arthroplasty Is Associated With Preoperative Hip Muscle Fat-Fraction.
  Journal of orthopaedic research : official publication of the Orthopaedic Research Society 2025 Halvorson RT, Archibeck E, Khattab K, Ngwe H, Ornowski J, Akkaya Z, Souza RB, O'Connell GD, Lotz J, Diaz C, Vail TP, Bailey JF
• Evaluating the Statistical Fragility of Comparative Studies on Autografts for Pediatric ACL Reconstruction.
  Orthopaedic journal of sports medicine 2025 Singh G, Alexeev SO, Haugh P, Halvorson RT, Wang D, Pandya NK, Feeley BT
• Demographic trends of boxing-associated fractures over 10 years.
  Injury 2025 Singh G, Alexeev SO, Nosrat C, Arammash M, Halvorson R
• COVID-19 Diagnosis Within 6 Weeks of Arthroscopic Knee Surgery Leads to Higher Risk for Postoperative Venous Thromboembolism.
  Arthroscopy : the journal of arthroscopic & related surgery : official publication of the Arthroscopy Association of North America and the International Arthroscopy Association 2024 Wang KC, Wang S, Serna J, Su F, Halvorson RT, Lansdown DA, Ma CB, Zhang AL
• Association Between Tibiofemoral Bone Shape Features and Retears After Anterior Cruciate Ligament Reconstruction.
  Orthopaedic journal of sports medicine 2024 Bailey KN, Gao KT, Halvorson RT, Oeding JF, Majumdar S, Pedoia V, Lansdown DA
• Low-Volume and Early-Career Surgeons Have Higher Risk for Reoperation and Complications Following Anterior Cruciate Ligament Reconstruction.
  Arthroscopy : the journal of arthroscopic & related surgery : official publication of the Arthroscopy Association of North America and the International Arthroscopy Association 2024 Foley AJ, Halvorson RT, Nosrat C, Ho BR, Nawari AN, Terada-Herzer K, Feeley BT, Lansdown DA, Ma CB, Zhang AL
• Adoption of reverse total shoulder arthroplasty for surgical treatment of proximal humerus fractures differs by patient race.
  Journal of shoulder and elbow surgery 2024 Halvorson RT, Su F, Ghanta RB, Garcia-Lopez E, Lalchandani GR, Shapiro LM
• Impact of Surgeon Variability on Outcomes after Total Shoulder Arthroplasty: an Analysis of 2,188 Surgeons
  Seminars in Arthroplasty: JSES 2024 Favian Su, MD, Cameron Nosrat, BS, Ryan T. Halvorson, MD, Brian T. Feeley, MD, C. Benjamin Ma, MD, Alan L. Zhang, MD
• Management of Proximal Hamstring Injuries: Non-operative and Operative Treatment.
  Current reviews in musculoskeletal medicine 2024 Yetter TR, Halvorson RT, Wong SE, Harris JD, Allahabadi S
• Disintegration of Multiple Parts of a Bone Transport Nail During Planned Removal: A Case Report.
  JBJS case connector 2024 Halvorson R, Kandemir U
• Predicting Recovery Following Total Hip and Knee Arthroplasty Using a Clustering Algorithm.
  Arthroplasty today 2024 Halvorson RT, Torres-Espin A, Cherches M, Callahan M, Vail TP, Bailey JF
• Increasing Use of Promotional Language in Orthopaedic Surgery Abstracts-An Analysis of 112,916 Abstracts 1985 to 2020.
  Journal of the American Academy of Orthopaedic Surgeons. Global research & reviews 2024 Halvorson RT, Wong LH, Feeley BT
• Extensor Mechanism Reconstruction Using Achilles Tendon Allograft With Suture Tape Augmentation.
  Arthroscopy techniques 2023 Halvorson RT, Dilallo M, Garcia-Lopez E, Colyvas N, Wong SE
• Generation of 5-Strand Hamstring Autograft for Anterior Cruciate Ligament Reconstruction-A Technical Note.
  Arthroscopy techniques 2023 Garcia-Lopez E, Ghanta RB, Halvorson RT, Feeley B
• Novel Tools to Approach and Measure Outcomes in Patients with Fractures.
  Hand clinics 2023 Garcia-Lopez E, Halvorson R, Shapiro L
• Bone and Joint Journal Orthopaedic Proceedings
  EARLY RECOVERY FOLLOWING TOTAL HIP ARTHROPLASTY IS ASSOCIATED WITH THE ADJACENT MUSCLE QUALITY 2023 RT Halvorson, K Khattab, H Ngwe, J Ornowski, Z Akkaya, RP Matthew, R Souza, A Bird, J Lotz, TP Vail, JF Bailey
• Multi-domain biopsychosocial postoperative recovery trajectories associate with patient outcomes following lumbar fusion.
  European spine journal : official publication of the European Spine Society, the European Spinal Deformity Society, and the European Section of the Cervical Spine Research Society 2023 Halvorson RT, Torres-Espin A, Callahan M, Tay B, O'Neill C, Berven S, Lotz JC, Bailey JF
• #OrthoTwitter: Relationship Between Author Twitter Utilization and Academic Impact in Orthopaedic Surgery.
  Cureus 2023 Halvorson RT, Allahabadi S, Cevallos N, Foley AJ, Collins K, Torres Espin A, Feeley BT, Pandya NK, Bailey JF
• Incidence of Venous Thromboembolism After Hip Arthroscopy Is Low With or Without Prophylaxis but Risk Factors Include Oral Contraceptive Use, Obesity, and Malignancy.
  Arthroscopy : the journal of arthroscopic & related surgery : official publication of the Arthroscopy Association of North America and the International Arthroscopy Association 2022 Holler JT, Halvorson RT, Salesky M, Ma CB, Feeley BT, Leavitt AD, Lansdown DA, Zhang AL
• Management of Displaced Midshaft Clavicle Fractures in Pediatrics and Adolescents: Operative vs Nonoperative Treatment.
  Orthopedic research and reviews 2022 Markes AR, Garcia-Lopez E, Halvorson RT, Swarup I
• Perioperative Thromboprophylaxis Is Associated With Lower Risk of Venous Thromboembolism After Knee Arthroscopy.
  Arthroscopy : the journal of arthroscopic & related surgery : official publication of the Arthroscopy Association of North America and the International Arthroscopy Association 2022 Holler JT, Salesky M, Halvorson RT, Zhang AL, Ma CB, Feeley BT, Leavitt AD, Colyvas N, Lansdown DA
• Point-of-care motion capture and biomechanical assessment improve clinical utility of dynamic balance testing for lower extremity osteoarthritis.
  PLOS digital health 2022 Halvorson RT, Castillo FT, Ahamed F, Khattab K, Scheffler A, Matthew RP, Lotz J, Vail TP, Feeley BT, Bailey JF
• Association of Insurance Status With Treatment Delays for Pediatric and Adolescent Patients Undergoing Surgery for Patellar Instability.
  Orthopaedic journal of sports medicine 2022 Allahabadi S, Halvorson RT, Pandya NK
• No Correlation Between Clinical Outcomes and Changes in the Tibia-Metaphyseal Angle Following Total Knee Arthroplasty: A Retrospective Study.
  The Journal of arthroplasty 2022 Cherches M, Coss N, Nguyen K, Halvorson R, Allahabadi S, Bini S
• Anatomic Radial Head Arthroplasty: The Importance of Implant Angle.
  The Journal of hand surgery 2022 Cherches MF, Halvorson R, Lalchandani G, Kandemir U, Lattanza LL, Lee N
• Interobserver and Intraobserver Reliability of Classification Systems for Radiographic Complications After Radial Head Arthroplasty.
  The Journal of hand surgery 2022 Halvorson RT, Lalchandani GR, Cherches MF, Petit LM, Lattanza L, Lee NH, Kandemir U
• Patient outcomes and costs after isolated flexor tendon repairs of the hand.
  Journal of hand therapy : official journal of the American Society of Hand Therapists 2021 Lalchandani GR, Halvorson RT, Zhang AL, Lattanza LL, Immerman I
• Opioid Use following Open versus Endoscopic Carpal Tunnel Release: A Population Study.
  Plastic and reconstructive surgery. Global open 2021 Withers JA, Lalchandani GR, Halvorson RT, Immerman I, Rahgozar P
• Predictors of a change in patient willingness to have Total knee arthroplasty: Insights from the osteoarthritis initiative.
  The Knee 2020 Bendich I, Halvorson RT, Ward D, Nevitt M
• Wide-Awake Local Anesthesia for Minor Hand Surgery Associated With Lower Opioid Prescriptions, Morbidity, and Costs: A Nationwide Database Study.
  Journal of hand surgery global online 2019 Lalchandani GR, Halvorson RT, Rahgozar P, Immerman I
• IMU Sensor Fusion Algorithm for Monitoring Knee Kinematics in ACL Reconstructed Patients.
  Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Annual International Conference 2019 Bravo-Illanes G, Halvorson RT, Matthew RP, Lansdown D, Ma CB, Bajcsy R
• Scientific Quality of Health-Related Articles in Specialty Cannabis and General Newspapers in San Francisco.
  Journal of health communication 2018 Halvorson RT, Stewart CC, Thakur A, Glantz SA
• Automated fabrication of photopatterned gelatin hydrogels for organ-on-chips applications.
  Biofabrication 2018 Nawroth JC, Scudder LL, Halvorson RT, Tresback J, Ferrier JP, Sheehy SP, Cho A, Kannan S, Sunyovszki I, Goss JA, Campbell PH, Parker KK