Archives: Team Members


Sarah Carnigan, PA-C

Sarah grew up in Davison, Michigan and attended the University of Michigan-Flint where she earned her Bachelor of Science degree in Biology. She then went on to pursue a degree in Physician Assistant Studies and completed her Master of Science degree in 2010 from Central Michigan University. Shara has practiced emergency medicine since 2010 and enjoys serving her community. She 

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Roberta Knittle, M.S., MSPAS, PA-C

Raised in Westland, Michigan. Earned a Bachelor’s degree from The University of Michigan-Dearborn and a Master’s of Science in Molecular Biology from Vanderbilt University. She earned her Master’s in Physician Assistant studies from Wayne State University. She has been a practicing PA for over two decades with experience in Emergency Medicine, Urgent Care, and Family Medicine. She is committed to 

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Rebekah VanAken, PA-C

Rebekah grew up in Greenville, Pennsylvania. She graduated with a Bachelor of Science degree in Neuroscience and Exercise Science from Central Michigan University where she competed on their track and field team as a pole-vaulter. She then continued studying at Central Michigan University, where she received her Master’s in Physician Assistant studies in 2020. Since then, she has been serving 

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Michael Beckley, PA-C

Mike grew up in Linden, Michigan and graduated with a Bachelors of Science degree from Michigan State University. He received a Master’s of Science degree in Physician Assistant Studies from Grand Valley State University in 2007. Mike practiced in Family Medicine before spending the last 12 years in the Emergency Room at McLaren and Beaumont Hospitals. He and his family 

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Matthew Kanelos, PA-C

Matthew Kanelos grew up in Brighton, MI. He graduated from the University of Michigan in 2010 with a Bachelor’s of Science in Biology. He completed a Masters of Science in Physician Assistant studies at Wayne State University in 2014, and has been practicing Urgent Care and Emergency Medicine ever since. He enjoys spending time with his wife Ashley, and his 

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Maegen Mandevill, PA-C

Maegen grew up in Yale, MI and is a 2005 graduate of Yale High School. She received her Bachelors Degree in Health Service Administration from University of Detroit Mercy in 2009 and then later went on to pursue her Masters of Science in Physician Assistant Studies at Wayne State University. She completed her Graduate Degree in 2016 and has worked 

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Kimberly Lange, FNP-BC

Kim’s roots in Montrose, Michigan, led her to Saginaw Valley State University, where she earned a Bachelor of Science and a Master of Science in Nursing, specializing as a Family Nurse Practitioner. She joined the Springfield Urgent Car team in 2022. Residing in Fenton with her husband Jeff and four Children, Kim finds joy in family moments, travel, hiking and 

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Karen Martens, PA-C

Karen grew up in Detroit and attended Wayne State University for her undergraduate and graduate degrees, obtaining her Master’s in the inaugural class of the Physician Assistant studies program. She brings over 20 years experience as a Physician Assistant in Family Medicine, Emergency Medicine and Urgent Care. Prior to joining Springfield Urgent Care, she dedicated the majority of her career 

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Clark Rizzardi, PA-C

Clark was born in Ann Arbor and raised mostly in Florida. Attended the University of Pittsburgh, where he discovered his interest in medicine and obtained a BS in Biology with the goal of becoming a Physician Assistant. Shortly after graduating from college, Clark moved to Atlanta, Georgia where he trained as an Advanced EMT and worked in that capacity. In 

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