William Berrigan, MD
Assistant Professor
Orthopaedic Surgery
School of Medicine

Dr. Berrigan is a primary care sports medicine doctor who focuses on helping patients of all ages stay active, reduce injury risk and achieve peak performance.

Dr. Berrigan is board-certified in Sports Medicine, Physical Medicine and Rehabilitation and Musculoskeletal Sonography, and fellowship-trained in Primary Care Sports Medicine. Dr. Berrigan has a particular focus on providing ultrasound-guided injections and non-operative care for patients with acute sports injuries, chronic disorders and pain conditions.

An avid researcher, Dr. Berrigan’s clinical research interests include: non-invasive measures for diagnosis and treatment of chronic exertional compartment syndrome; ultrasound shear wave elastography as a diagnostic and prognostic tool for musculoskeletal pathology and interventions; and evidenced-based use of orthobiologics, which involve using a patient’s own cells and growth factors to treat an injury.

Dr. Berrigan earned his medical degree at St. George’s University School of Medicine, Grenada, West Indies. He completed an internship in internal medicine at the Hackensack Meridian Jersey Shore University Medical Center, and followed with a residency in Physical Medicine and Rehabilitation at Medstar Georgetown National Rehabilitation Hospital. Dr. Berrigan then completed fellowship training in Primary Care Sports Medicine at Emory University School of Medicine where he served an additional year as chief fellow focused on teaching and academic leadership.

While at Emory, Dr. Berrigan provided sports coverage for the Atlanta Falcons (NFL), the Atlanta Hawks (NBA) and the Atlanta Dream (WNBA). He served as head team physician for the professional Fan Controlled Football (FCF) league and assistant team physician for the College Park Skyhawks, the G league affiliate of the Atlanta Hawks. During his undergraduate years at Villanova University, he was a hammer thrower on the school’s Division 1 Track and Field team. Additionally, he has also been involved in competitive bodybuilding.

Dr. Berrigan grew up in San Marcos, California. He enjoys spending time with his family, traveling, hiking national parks and following Villanova basketball.

Dr. Berrigan sees patients at both the UCSF Orthopaedic Institute on the Mission Bay campus in San Francisco and at the UCSF Redwood Shores Specialty Clinic on the Peninsula.

• Non-operative Management and Outcomes of Femoroacetabular Impingement Syndrome
  Current Reviews in Musculoskeletal Medicine 2023 Pasculli, R.M., Callahan, E.A., Wu, J., Edralin N, Berrigan W
• Mesenchymal stem cells for subchondral bone marrow lesions: From bench to bedside.
  Bone reports 2022 Pasculli RM, Kenyon CD, Berrigan WA, Mautner K, Hammond K, Jayaram P
• Regulatory Considerations of Orthobiologic Procedures
  Physical Medicine and Rehabilitation Clinics of North America 2022 Kudo JangMD, William A.Berrigan MD, Ken Mautner MD
• A scoping review of methods used in musculoskeletal soft tissue and nerve shear wave elastography studies.
  Clinical neurophysiology : official journal of the International Federation of Clinical Neurophysiology 2022 Cipriano KJ, Wickstrom J, Glicksman M, Hirth L, Farrell M, Livinski AA, Esfahani SA, Maldonado RJ, Astrow J, Berrigan WA, Piergies AMH, Hobson-Webb LD, Alter KE
• Calcific Tendinopathy of the Shoulder: A Retrospective Comparison of Traditional Barbotage Versus Percutaneous Ultrasonic Barbotage.
  Clinical journal of sport medicine : official journal of the Canadian Academy of Sport Medicine 2022 Berrigan W, Olufade O, Negron G, Easley K, Sussman WI
• Botulinum Toxin A for Chronic Exertional Compartment Syndrome Evaluated With Shear Wave Elastography: A Case Report.
  Clinical journal of sport medicine : official journal of the Canadian Academy of Sport Medicine 2022 Berrigan WA, Wickstrom J, Farrell M, Alter K
• Diagnostic Imaging of A2 Pulley Injuries: A Review of the Literature.
  Journal of ultrasound in medicine : official journal of the American Institute of Ultrasound in Medicine 2021 Berrigan W, White W, Cipriano K, Wickstrom J, Smith J, Hager N
• Management of Anterocapitis and Anterocollis: A Novel Ultrasound Guided Approach Combined with Electromyography for Botulinum Toxin Injection of Longus Colli and Longus Capitis.
  Toxins 2020 Farrell M, Karp BI, Kassavetis P, Berrigan W, Yonter S, Ehrlich D, Alter KE
• Hip position influences shear wave elastography measurements of the hamstring muscles in healthy subjects.
  Journal of biomechanics 2020 Berrigan WA, Wickstrom J, Farrell M, Alter K
• Acute Spinal Epidural Hematoma as a Complication of Dry Needling: A Case Report.
  PM & R : the journal of injury, function, and rehabilitation 2019 Berrigan WA, Whitehair CL, Zorowitz RD
• Visual Diagnosis: Quadriceps Tendon Rupture.
  The Journal of emergency medicine 2018 Berrigan W, Geer R, Jelnick JS, Davis JE, Bunning R
• A Case of Anterior Spinal Artery Syndrome Caused by Streptococcus mitis Endocarditis.
  Case reports in medicine 2018 Mahtabfar A, Eshraghi H, D'Souza M, Berrigan W, Casey K
• Poster 201 Characterization of Aphasia in Acute Stroke Patients and Correlation with Functional Outcomes.
  PM & R : the journal of injury, function, and rehabilitation 2016 Yuan H, Sebro T, Lee CJ, Berrigan WA, Mann SJ, Hong SW, Patel M, Lefkowitz TR