Meet Our Faculty
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From the program director
Welcome to the Internal Medicine Residency at Mayo Clinic in Phoenix/Scottsdale, Arizona! We have a very unique setting in which medical school graduates will transform into well-trained internists ready for the next step in their careers.
Mayo Clinic's campus in Arizona is a distinctive academic medical center that excels in our three areas of emphasis: patient care, research, and education.
We have a diverse and accomplished group of attending physicians, many with national and international reputations. We benefit from the strength and traditions of Mayo pioneers while enjoying the growth and innovation of the Southwest.
Because Mayo Clinic draws patients from a national and international community, we see varied and fascinating pathology, while at the same time dealing regularly with common illnesses and prevention strategies.
Our staff, residents, and fellows work in collaboration in a collegial culture across disciplines. As we seek to advance the science of medicine, we focus on our primary value, "the needs of the patient come first."
I welcome you to learn more about our residents and our program — and to consider joining us on the journey.
Sarah Umar, M.D.
Internal Medicine Residency Program Director
Program leadership
What makes our program special is the people. Come meet them!
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Sarah Umar, M.D. Internal Medicine Residency Program Director Consultant, Gastroenterology and Hepatology Assistant Professor of Medicine |
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Nathan Delafield, M.D. Internal Medicine Residency Associate Program Director Senior Associate Consultant, Community Internal Medicine “I've always appreciated the special opportunity to support residents during these incredibly challenging and formative years. Remaining involved in GME has allowed me to play a more active role in mentoring and advising our residents. Our residents are smart, compassionate, and kind, which makes it a joy to work closely with them and contribute to the next generation of internists prepared for successful careers in medicine. Mayo Clinic's commitment to education has been instrumental in my growth as both a physician and educator. The institution's investment in protected teaching time, educational resources, and learner development has enabled me to become more deeply involved in medical education. Through these opportunities, I have strengthened my skills as a leader, teacher, clinician, and advocate, while finding great fulfillment in helping shape the next generation of physicians. Mayo's culture of learning continually inspires me to pursue excellence and lifelong growth in all aspects of my professional practice.“ |
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Gretchen Taylor, M.D. Internal Medicine Residency Associate Program Director Senior Associate Consultant, Hospital Internal Medicine Assistant Professor of Medicine |
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Camille Hawkins, M.D. Internal Medicine Residency Associate Program Director Senior Associate Consultant, Hospital Internal Medicine “Inspiring and training the next generation of physicians is a privilege of my career as an academic hospitalist. I hope to help residents grow in their journey in becoming physician leaders and educators.“
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Nolan McBride, M.D. Internal Medicine Residency Associate Program Director Senior Associate Consultant, Rheumatology Instructor in Medicine “I recognized early on in medical school that the time spent educating patients and junior learners was a true source of joy. This passion has continued to grow through each step of my career. I am honored for the opportunity to take the skills and wisdom imparted on me by my own teachers at Mayo Clinic and pass them on to our current and future residents.“ |
Core faculty
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Evan Morris, D.O. Senior Associate Consultant, Hospital Internal Medicine Internal Medicine Residency, Core Faculty Director, Education in Hospital Internal Medicine "The Internal Medicine residency program at Mayo Clinic attracts residents of diverse backgrounds who are all talented, intelligent, and kind. Serving as an attending and core faculty member inspires me to become a better physician and educator. It is a true joy to be part of an education leadership team dedicated to modeling patient-centered care and helping residents become the exceptional physicians they strive to be." |
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Brittany Muscha, M.D. Senior Associate Consultant, Hospital Internal Medicine Internal Medicine Residency, Core Faculty Director, Quality Improvement Curriculum “As a resident, I was supported and mentored by a group of attendings that never lost focus of the fact that the work we do as physicians is truly special. Now as an attending, it's such a privilege to get to be that source of support for our incredible group of residents. As we work together, I love being able to share my passion for providing exceptional patient care and am always searching for opportunities to celebrate a job well done.” |
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Irbaz Riaz, M.B.B.S., Ph.D. Senior Associate Consultant, Hematology/Oncology Internal Medicine Residency, Core Faculty Director, Artificial Intelligence in Medicine Research Track “I trained at Mayo, and what struck me then was that teaching was never treated as something you did after the real work. It was the real work. That culture is set from the top, and it is why I have been able to build new avenues for learners here, including a track for residents interested in artificial intelligence in medicine. Institutions and leaders who take education seriously give the rest of us room to try things.” |
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Hugo Vargas, M.D. Director, Research Curriculum Consultant, Gastroenterology and Hepatology “I am inspired by the transformation of intelligent young clinicians over their post-graduate years. My personal experience has shaped me into a clinician engaged in research and has enriched my experience beyond my expectations. I would like to impart some of that magic to our learners. Mayo Clinic is a particularly apt environment to fulfill that mission because research and education are such a big part of the Mayo model. I remain young and inspired by the energy I see in our learners each and every day.” |
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Aman Verma, D.O. Consultant, Hospital Internal Medicine Internal Medicine Residency, Core Faculty Director, Innovation in Medicine Track and Pathway “Medical education gives me the opportunity to invest in the physicians who will shape the future of medicine. I find it incredibly rewarding to mentor residents as they develop not only as clinicians, but also as educators, innovators, and leaders — and to help them discover how their own interests and ideas can make healthcare better for the patients and communities they will serve.” |
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Shaun Yang, M.D., M.P.H. Consultant, Hospital Internal Medicine Internal Medicine Residency, Core Faculty Director, Point of Care Ultrasound Curriculum “When I arrived at Mayo Clinic, I thought long and hard about how to build a career in medicine that would be meaningful to me over the years. Beyond striving for excellence in patient care, I believe the best way to make a lasting positive impact is to contribute to the education and training of residents and other learners — who will, in turn, care for far more people than I ever could alone. This perspective gives me a deeper sense of purpose each day when I wake up to attend on the teaching service. I am especially fortunate to have found an educational niche in point-of-care ultrasound. Having the opportunity to train the residents each year in point-of-care ultrasound is incredibly rewarding and a lot of fun. I am continually inspired by how bright and accomplished the incoming class of interns is—and more importantly, by what wonderful people they are.“ |
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Patress Persons, M.D. Co-Director, Medical Education Curriculum Senior Associate Consultant, Primary Care in Arizona, Community Internal Medicine |
Education program coordinators
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Saebom An Education Program Coordinator “One of the most rewarding parts of my role is building relationships with our residents and supporting them throughout their training. Whether I'm helping them navigate day-to-day challenges or celebrating their milestones, I enjoy being a consistent source of support so they can focus on becoming outstanding physicians. Their dedication, resilience, and compassion make it a privilege to be part of their journey.” |
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Zach Haase Education Program Coordinator “The most rewarding part of supporting this residency program is the opportunity to build meaningful, lasting relationships with both residents and faculty while helping cultivate an environment where curiosity, growth, and excellence thrive. Watching them pursue their goals with determination and knowing that you played a small part in their journey toward becoming the next generation of healthcare providers makes the experience truly fulfilling.” |
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Melissa Tadeo Education Program Coordinator “The most rewarding part of supporting this residency program is that every day is different. I enjoy being a mentor and resource for our residents, helping them navigate challenges and supporting their growth throughout training. I contribute to a better resident experience by providing timely communication, accurately coordinating schedules, and anticipating residents' needs before issues arise. Knowing that my work contributes to a positive residency experience makes the role especially meaningful. What inspires me most is seeing everything our residents accomplish both educationally and professionally at such an early stage in their careers. Their dedication, resilience, and commitment to continuous learning are motivating, and they inspire me to keep growing, challenging myself, and striving to achieve more in my own professional journey.” |