Physician Assistants

Boulder Neurosurgical & Spine Associates Physician Assistants

Alex Ashton, PA-C

Alex Ashton grew up in the Denver area and has always been fascinated by medicine. For years he worked at a local Ski Patrol and as a Paramedic in Boulder and Weld counties before graduation from the Yale University Physician Associate Program in 2002. At Boulder Neurosurgical Associates, he works closely with Dr. Villavicencio. Alex enjoys the challenges neurosurgery offers and is excited to work with highly skilled, experienced, and motivated surgeons.

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Eric Busch, PA-C

Eric Busch is a Physician Assistant at Boulder Neurosurgical Associates since 2002. He graduated from Cornell University Medical College Physician Assistant program. He made his decision to pursue a medical career after working as an outdoor educator at the Grand Teton National Park in Wyoming.

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Gene Cook, PA

Gene Cook graduated from the University of Colorado Denver's Physician Assistant program. Since attending Colorado State University in Fort Collins, CO, Gene has been fascinated by medicine. Gene is enthused about work with his colleagues at Boulder Neurosurgical Associates.

Between college and his PA training, he became a Certified Nursing Assistant, while developing his skills as a volleyball player and coach. Growing up in an Air Force family has afforded Gene an opportunity to live in different places.

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Michael Kiley, PA-C

Michael was originally attracted to medicine after taking a course at the University of Colorado at Boulder to become an Emergency Medical Technician (EMT). He has worked on ski patrol and as an EMT at Boulder Community Hospital before graduating from Albany Medical College's Physician Assistant Program. He has experience in Emergency Medicine, Orthopedic Surgery and Neurosurgery. He enjoys the challenges of Neurosurgery and especially guiding patients thru their recovery process. Michael enjoys outdoor activities with a special love for motorcycles, camping, fishing and hiking.

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Carrie Riantong, RN

Carrie Riantong grew up in the Front Range area and received her nursing degree from the University of Northern Colorado in Greeley. Thereafter, she started her nursing career at Longmont United Hospital in perioperative services.

Currently, Carrie is working to achieve a Masters of Science in Nursing from the University of Colorado with the goal to practice as an Adult Nurse Practitioner.

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Jennifer Juarez, RN

Jennifer Juarez is a registered nurse and has been working with BNA since 2010. She was an aviation electrician in the United States Navy for five years, after which she pursued her nursing career in Colorado, initially in intensive care.

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