Dr. Wolfe

Meet Our Experts

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Your health care team is key to your care.

From the office staff that welcomes you, to the nurse who puts you at ease, to the radiologist who treats you, our entire team is 100% dedicated to your care and comfort. Led by our interventional radiologist, CDI Vascular Care’s specialists offer the expertise, care and service you need to get on the road to better health.


Mary Collier, Nurse Practitioner

Mary Collier

Mary holds a Master of Arts Degree in Nursing, with a concentration in Geriatrics, from The College of St. Catherine in St. Paul, Minn. and received her Bachelor of Science in Nursing from Grand View College in Des Moines, Iowa.


Greg Allen, MPAS, PA-C

Greg Allen

Greg completed his PA (physician assistant) studies at St. Catherine University Henrietta Schmoll School of Health in St. Paul, Minn.




Our Staff

Nathan Braun, Radiology Practitioner Assistant, Clinical Supervisor

Nathan Braun

Nathan received his clinical training through a joint program between the University of Minnesota and Weber State University. He has worked in interventional radiology for 15 years.


Tina DeYoung, Registered Nurse

Tina DeYoung

Tina earned her Associate of Arts Degree at Normandale Community College in Bloomington, Minn. and earned her Bachelor of Science in Nursing (BSN) Degree at the University of Minnesota.


Angela Guentner, Technologist Assistant

Angela Guentner

Angela received her bachelor’s degree in Anthropology at the University of Wisconsin-Madison and her associate’s degree in Nursing at Minneapolis Community and Technical College. Angela has focused her nursing career in Women's reproductive health.


Lisa Kerkow, Certified Medical Assistant

Lisa Kerkow

Lisa completed medical assistant education at Minnesota School of business in March of 2012 and passed the certification in May of 2012. 


Anna Olson, Registered Vascular Technologist

Anna Olson

Anna received her clinical training and Associate of Applied Science degree in Diagnostic Medical Sonography from Argosy University in the Twin Cities. She received her Bachelor of Arts degree from St. Olaf College.


Katharine Stone, Vascular Ultrasound Technologist

Katharine Stone

Katie received her Associates of Applied Science Degree in Vascular Sonography and Medical Assisting through Argosy University in the Twin Cities. She received her Bachelors of Arts degree from Gustavus Adolphus College. She holds credentialing in Vascular and Abdominal.


Julie Campos, Administrative Supervisor

Julie Campos

Julie earned her Associate of Arts at North Hennepin Community College and is going to school for her Business Management Degree. 


Morgen Horan, Patient Coordinator

Morgan Horan

Morgen received her bachelor’s degree in Biology, Society and the Environment from University of Minnesota where she minored in the History of Science, Medicine and Technology.


Ger Hang, Certified Medical Assistant

Ger Hang

Ger completed the Medical Assistant program at Chippewa Valley Technical College. 


Monica Crandall, Patient Coordinator

Monica Crandall

Monica will be completing her Associates of Arts Degree in the spring of 2018. 


Alyssa Torfin, Registered Nurse

Alyssa Torfin

Alyssa earned her bachelor’s degree in nursing through Baker University in Baldwin City, Kansas. She has focused most of her career towards critical care nursing.


Sherry Lucas, Interventional Radiologic Technologist

Sherry received her Associates of Applied Science Degree through East Grand Forks Northwest Technical College and the University of Minnesota - Crookston.  She has been working in Interventional Radiology for 20 years.


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