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Emergency medicine faculty biographies


Sara dimeo

Role in Program: Program Director

Specialty: Emergency Medicine

Medical School: George Washington School of Medicine and Health Sciences, Washington, DC

Residency: University of Arizona-Tucson

Fellowship: University of California-Irvine, Multimedia Design Education Technology

Other Degrees: Masters in Health Professions' Education (MEHP), Johns Hopkins School of Education

Board Certifications: American Board of Emergency Medicine (ABEM)

Awards and Honors: Chief Resident (2016-2017), Emergency Medicine Residents' Association (EMRA) Presidential Leadership Award

Professional Affiliations: Fellow of the American College of Emergency Physicians (ACEP), Council of Residency Directors in Emergency Medicine

Sara dimeo

Role in Program: Program Director

Specialty: Emergency Medicine

Medical School: George Washington School of Medicine and Health Sciences, Washington, DC

Residency: University of Arizona-Tucson

Fellowship: University of California-Irvine, Multimedia Design Education Technology

Other Degrees: Masters in Health Professions' Education (MEHP), Johns Hopkins School of Education

Board Certifications: American Board of Emergency Medicine (ABEM)

Awards and Honors: Chief Resident (2016-2017), Emergency Medicine Residents' Association (EMRA) Presidential Leadership Award

Professional Affiliations: Fellow of the American College of Emergency Physicians (ACEP), Council of Residency Directors in Emergency Medicine


evan leibner

Role in Program: Core faculty, Patient Safety and Quality Improvement, Administration

Specialty: Emergency Medicine

Medical School: University of Health Sciences/The Chicago Medical School

Residency: Wayne State University/Detroit Receiving Hospital

Board Certifications: Emergency Medicine

Awards and Honors: Voluntary Faculty Teacher of the Year 1998, 1999

Professional Affiliations: Fellow of the American College of Emergency Physicians

evan leibner

Role in Program: Core faculty, Patient Safety and Quality Improvement, Administration

Specialty: Emergency Medicine

Medical School: University of Health Sciences/The Chicago Medical School

Residency: Wayne State University/Detroit Receiving Hospital

Board Certifications: Emergency Medicine

Awards and Honors: Voluntary Faculty Teacher of the Year 1998, 1999

Professional Affiliations: Fellow of the American College of Emergency Physicians


Andi Wolff

Role in Program: Associate Program Director, Ultrasound Director

Specialty: Emergency Medicine

Medical School: Indiana University School of Medicine

Residency: Indiana University Department of Emergency Medicine

Board Certifications: ABEM

Professional Affiliations: Fellow of the American Academy of Emergency Medicine, Fellow of the American College of Emergency Physicians

Andi Wolff

Role in Program: Associate Program Director, Ultrasound Director

Specialty: Emergency Medicine

Medical School: Indiana University School of Medicine

Residency: Indiana University Department of Emergency Medicine

Board Certifications: ABEM

Professional Affiliations: Fellow of the American Academy of Emergency Medicine, Fellow of the American College of Emergency Physicians


nick enriquez

Role in Program: Core faculty, Recruitment and Diversity, Equity, Inclusion and Belonging

Specialty: Emergency Medicine

Medical School: Drexel University School of Medicine

Residency: University of Arizona-Tucson

Board Certifications: ABEM

nick enriquez

Role in Program: Core faculty, Recruitment and Diversity, Equity, Inclusion and Belonging

Specialty: Emergency Medicine

Medical School: Drexel University School of Medicine

Residency: University of Arizona-Tucson

Board Certifications: ABEM


Josh Zeidler

Role in Program: Core faculty, EMS and Disaster Medicine

Specialty: Emergency Medicine, Pediatrics

Medical School: Des Moines University College of Osteopathic Medicine

Residency: Detroit Medical Center Wayne State University

Board Certifications: ABEM, American Board of Pediatrics, Emergency Medical Services (EMS)

Professional Affiliations: American College of Emergency Physicians, American Academy of Pediatrics, National Association of EMS Physicians

Josh Zeidler

Role in Program: Core faculty, EMS and Disaster Medicine

Specialty: Emergency Medicine, Pediatrics

Medical School: Des Moines University College of Osteopathic Medicine

Residency: Detroit Medical Center Wayne State University

Board Certifications: ABEM, American Board of Pediatrics, Emergency Medical Services (EMS)

Professional Affiliations: American College of Emergency Physicians, American Academy of Pediatrics, National Association of EMS Physicians


kaleena patel

Role in Program: Core faculty, Pediatric Emergency Medicine

Specialty: Pediatrics, Pediatric Emergency Medicine

Medical School: Keck School of Medicine of USC

Residency: UT Southwestern/Children's Health

Fellowship: Children's Hospital of Philadelphia

Other Degrees: Masters in Healthcare Quality and Safety (MHQS)

Board Certifications: Pediatrics, Board eligible for Pediatric Emergency Medicine

Awards and Honors: Chief Resident (2019-2020)

kaleena patel

Role in Program: Core faculty, Pediatric Emergency Medicine

Specialty: Pediatrics, Pediatric Emergency Medicine

Medical School: Keck School of Medicine of USC

Residency: UT Southwestern/Children's Health

Fellowship: Children's Hospital of Philadelphia

Other Degrees: Masters in Healthcare Quality and Safety (MHQS)

Board Certifications: Pediatrics, Board eligible for Pediatric Emergency Medicine

Awards and Honors: Chief Resident (2019-2020)


ryan adkins

Role in Program: Core faculty, Off Service Residents, Simulation

Specialty: Emergency Medicine

Medical School: Michigan State University School of Osteopathic Medicine

Residency: Ascension Macomb-Oakland Macomb, Michigan

Board Certifications: Board eligible for ABEM

Awards and Honors: Chief Resident (2019-2020)

Professional Affiliations: ACEP

ryan adkins

Role in Program: Core faculty, Off Service Residents, Simulation

Specialty: Emergency Medicine

Medical School: Michigan State University School of Osteopathic Medicine

Residency: Ascension Macomb-Oakland Macomb, Michigan

Board Certifications: Board eligible for ABEM

Awards and Honors: Chief Resident (2019-2020)

Professional Affiliations: ACEP


tanner folster

Role in Program: Core faculty, Clerkship Director

Specialty: Emergency Medicine

Medical School: Kirksville College of Osteopathic Medicine, Kirksville, MO

Residency: Lehigh Valley Health Network, Allentown, PA

Board Certifications: ABEM

Awards and Honors: Chief Resident (2016-2017), Resident of the Year 2017, Physician of the Month Mercy Gilbert Medical Center (March 2023)

Professional Affiliations: The Emergency Center

tanner folster

Role in Program: Core faculty, Clerkship Director

Specialty: Emergency Medicine

Medical School: Kirksville College of Osteopathic Medicine, Kirksville, MO

Residency: Lehigh Valley Health Network, Allentown, PA

Board Certifications: ABEM

Awards and Honors: Chief Resident (2016-2017), Resident of the Year 2017, Physician of the Month Mercy Gilbert Medical Center (March 2023)

Professional Affiliations: The Emergency Center


Melissa Kelsey

Role in Program: Core faculty, Wellness Director

Specialty: Emergency medicine

Medical School: Touro University Nevada College of Osteopathic Medicine

Residency: University of Arizona - Tucson

Board Certifications: ABEM

Awards and Honors: Critical Care Distinction Track 2017

Professional Affiliations: ACEP

Melissa Kelsey

Role in Program: Core faculty, Wellness Director

Specialty: Emergency medicine

Medical School: Touro University Nevada College of Osteopathic Medicine

Residency: University of Arizona - Tucson

Board Certifications: ABEM

Awards and Honors: Critical Care Distinction Track 2017

Professional Affiliations: ACEP


Erik Mattison

Role in Program: Medical Director, Chandler Regional Medical Center, Program Evaluation Committee (PEC) Chair

Specialty: Emergency Medicine

Medical School: Case Western Reserve University

Residency: Maricopa Medical Center, Phoenix

Board Certifications: American Board of Emergency Medicine, American College of Academic Addiction Medicine, Hyperbaric Medicine

Awards and Honors: Chief Resident, Richard A. Walsh Outstanding Resident Award, Outstanding Resident Award

Professional Affiliations: ACEP

Erik Mattison

Role in Program: Medical Director, Chandler Regional Medical Center, Program Evaluation Committee (PEC) Chair

Specialty: Emergency Medicine

Medical School: Case Western Reserve University

Residency: Maricopa Medical Center, Phoenix

Board Certifications: American Board of Emergency Medicine, American College of Academic Addiction Medicine, Hyperbaric Medicine

Awards and Honors: Chief Resident, Richard A. Walsh Outstanding Resident Award, Outstanding Resident Award

Professional Affiliations: ACEP


brian tiffany

Role in Program: Research Director

Specialty: Emergency Medicine

Medical School: Washington University of Medicine in St. Louis

Residency: Wayne State University/Detroit Receiving Hospital

Fellowship: Research, Wayne State University/Detroit Receiving Hospital

Other Degrees: PhD in Physiology

Board Certifications: American Board of Emergency Medicine, American College of Academic Addiction Medicine, Hyperbaric Medicine

Awards and Honors: Chief Resident, Richard A. Walsh Outstanding Resident Award, Outstanding Resident Award

Professional Affiliations: ACEP

brian tiffany

Role in Program: Research Director

Specialty: Emergency Medicine

Medical School: Washington University of Medicine in St. Louis

Residency: Wayne State University/Detroit Receiving Hospital

Fellowship: Research, Wayne State University/Detroit Receiving Hospital

Other Degrees: PhD in Physiology

Board Certifications: American Board of Emergency Medicine, American College of Academic Addiction Medicine, Hyperbaric Medicine

Awards and Honors: Chief Resident, Richard A. Walsh Outstanding Resident Award, Outstanding Resident Award

Professional Affiliations: ACEP


Role in Program: Director of Ultrasound Education
Specialty: Emergency Medicine
Medical School: University of Nevada, Reno - School of Medicine
Residency: John Peter Smith Health Network, Fort Worth TX
Fellowship: John Peter Smith Health Network, Ultrasound
Other Degrees: Masters in Public Health (MPH) – Focus on Health Administration and Policy, University of Nevada Reno
Awards and Honors: Clinician of the Quarter (2021 & 2022), Professionalism in Medicine Award for Duty
Professional Affiliations: American College of Emergency Physicians (ACEP), Academy of Emergency Ultrasound (AEUS)

Dr. Pavelka has an eclectic background, having worked in several different fields including but not limited to construction, public education, and military service prior to becoming a physician. Originally from Colorado, he has lived in several states, though most of his time and education occurred in Nevada. Dr. Pavelka started his medical career as an EMT in 2006 and worked in several settings prior to going to medical school at the University of Nevada. Having completed his emergency medicine and ultrasound training in Fort Worth, he now plans to apply this to an equally diverse array of interests. An outdoor enthusiast, Dr. Pavelka is also currently working towards his requirements as a Fellow of the Academy of Wilderness Medicine (FAWM) with the goal of doing excursion medicine in the future. He has traveled from Afghanistan to Uganda and would like to see all seven continents. Dr. Pavelka maintains his appreciation for EMS work, particularly in the setting of law enforcement. He has completed training through Counter Narcotics & Terrorism Operational Medical Support (CONTOM) and is looking to start working with local law enforcement as well. Dr. Pavelka lives with his wife and two dogs in Mesa, where she puts up with his equally diverse hobbies such as painting (albeit badly), axe throwing, and officiating weddings. 

Role in Program: Director of Ultrasound Education
Specialty: Emergency Medicine
Medical School: University of Nevada, Reno - School of Medicine
Residency: John Peter Smith Health Network, Fort Worth TX
Fellowship: John Peter Smith Health Network, Ultrasound
Other Degrees: Masters in Public Health (MPH) – Focus on Health Administration and Policy, University of Nevada Reno
Awards and Honors: Clinician of the Quarter (2021 & 2022), Professionalism in Medicine Award for Duty
Professional Affiliations: American College of Emergency Physicians (ACEP), Academy of Emergency Ultrasound (AEUS)

Dr. Pavelka has an eclectic background, having worked in several different fields including but not limited to construction, public education, and military service prior to becoming a physician. Originally from Colorado, he has lived in several states, though most of his time and education occurred in Nevada. Dr. Pavelka started his medical career as an EMT in 2006 and worked in several settings prior to going to medical school at the University of Nevada. Having completed his emergency medicine and ultrasound training in Fort Worth, he now plans to apply this to an equally diverse array of interests. An outdoor enthusiast, Dr. Pavelka is also currently working towards his requirements as a Fellow of the Academy of Wilderness Medicine (FAWM) with the goal of doing excursion medicine in the future. He has traveled from Afghanistan to Uganda and would like to see all seven continents. Dr. Pavelka maintains his appreciation for EMS work, particularly in the setting of law enforcement. He has completed training through Counter Narcotics & Terrorism Operational Medical Support (CONTOM) and is looking to start working with local law enforcement as well. Dr. Pavelka lives with his wife and two dogs in Mesa, where she puts up with his equally diverse hobbies such as painting (albeit badly), axe throwing, and officiating weddings.