Ryan Callahan, DPM, MS
FELLOW
Surgery
School of Medicine
Dr. Ryan Thomas Callahan joins the UCSF Department of Vascular Surgery as the Limb Preservation Clinical Fellow for the 2024-2025 academic year. Dr. Callahan is board certified by the American Board of Podiatric Medicine and completed his residency training in Podiatric Medicine and Surgery at the San Francisco VA Medical Center, where he served as Chief Resident during his final year.
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Before moving to the Bay Area, Dr. Callahan earned his Podiatric Medical Degree at Temple University in Philadelphia, PA, and prior, his Master’s Degree in Biomechanics with an additional Graduate Certificate in Developmental Disabilities at the University of Kentucky in Lexington, KY. While in Kentucky, Dr. Callahan completed his graduate thesis work at Shriner’s Children’s Hospital working to develop novel techniques for identifying children and adolescents diagnosed with cerebral palsy at high risk for falls. Additionally, Dr. Callahan worked with the Kentucky Department of Health to design health and wellness programs for individuals diagnosed with developmental disabilities and facing income disparities. Prior to graduate school, Dr. Callahan completed his Bachelor’s Degree in Kinesiology at the University of Massachusetts in Amherst, MA and worked four years as a Clinical Research Coordinator in the Department of Emergency Medicine at Massachusetts General Hospital. In his personal time, Dr. Callahan enjoys spending time with his fiancee', hiking and going to the beach with his dog, cheering for his favorite Boston and Kentucky sports teams, exercising and reading.
Education & Training
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- DPM Podiatric Medicine Temple University 05/2021
- MS Biomechanics University of Kentucky 07/2017
- BS Kinesiology University of Massachusetts 05/2010
Interests
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- Lower Extremity Biomechanics
- Complex Wound Care
- Limb Preservation
Publications (5)
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Institutional Toe & Flow Programs: How and Why the Teams Work
Seminars in Vascular Surgery 2025 AA Naiem, RT Callahan, AM Reyzelman & MS Conte -
Center of Pressure Excursion during a single leg standing test in ambulatory children with cerebral palsy
Center of Pressure Excursion during a single leg standing test in ambulatory children with cerebral palsy 2017 RT Callahan -
Dose‐associated pulmonary complication rates after fresh frozen plasma administration for warfarin reversal
Journal of Thrombosis and Haemostasis 2016 AL Marshall , M Levine, ML Howell, Y Chang, E Riklin, BA Parry, RT Callahan, I Okechukwu, AM Ayres, BV Nahed, JN Goldstein -
Serial procalcitonin as a predictor of bacteremia and need for intensive care unit care in adults with pneumonia, including those with highest severity: a prospective cohort study
Open Forum Infectious Diseases 2016 SM McCluskey, P Schuetz, MS Abers, B Bearnot, ME Morales, D Hoffman, S Patel, L Rosario, V Chiappa, BA Parry, RT Callahan, SA Bond, K Lewandrowski, W Binder, MR Filbin, JM Vyas, and MK Mansour -
Annals of Emergency Medicine
411 Thromboembolism After Emergency Warfarin Reversal With Fresh Frozen Plasma 2015 Levine, M, A Marshall, ML Howell, SH Thomas, E Riklin, BA Parry, RT Callahan, I Okechukwu, WS Dzik, and JN Goldstein