Our Team


Stacey Buchan_cropped-4Stacey Buchan MSBS, PA-C

Physician Assistant

Stacey received her Masters of Science in Biomedical Sciences, Physician Assistant from the University of Toledo. She has a particular interest in Gerontological practice. She is always engaged in continuing medical education so she can stay on the cutting edge of medical treatment advancements.



Michael Coyle_cropped-1Michael Coyle, PA-C

Michael Coyle was born and raised in Jacksonville, Florida. He earned his bachelor in biology at Ave Maria University in Naples, Fl. While attending Ave Maria, he was the head of a bio-chemical research group for two years. He then went on to spend a year working with patients at the largest ophthalmology group in Jacksonville, Florida. This was the time where he developed his love and care for his patient and taking the time to always treat them as family. He then went on to get his Masters of Medical Science at Nova Southeastern University. His first job out of training was with a busy spine neurosurgical practice based out of Jacksonville, Florida. The group that he was associated with working both in-patient and out-patient setting. It was in this job that he was able to find his love and passion for taking care of some of the most complex patients. Patient's that have dealt with back pain for just a few days, all of the way to ones that have had pain for more than twenty years. He realizes that Neurosurgery is not just the art of operating, but it is the art of caring for our patients in the most well rounded and complete way possible. As a surgical APP, his primary role will be to help and assist his surgeon provide the best quality care that can be provided to there patients. In his free time, he likes to spent time with his family, enjoying the peacefulness of sunsets and sunrises, traveling, and playing golf and basketball.


FreemanPatricia_croppedPatricia A. Freeman, BS, PA-C, NCCPA

Physician Assistant

Patricia A. Freeman has been a licensed physician assistant since 1992, after graduating with honors from University of Florida. Her first career position was at Mayo Clinic in Jacksonville, Florida, in the Plastic Surgery Department.  She moved back to her birth state of Colorado with her awesome husband and four children in 1993.  Patricia has been a surgical and clinical Physician Assistant (PA) for the past 26 years, working in the areas of Head and Neck Reconstructive Surgery, Orthopedic Spine Surgery and currently in Neurosurgery for over 8 years. She thoroughly enjoys reading any type of well written literature and she also loves everything about the Colorado mountains.  She is an enthusiastic skier, snowshoer, hiker and she is currently learning how to paddle board. Patricia is not particularly good at any of these sports but she loves to be outdoors. Her pure joy is her interactions with her patients and being given the honor of their trust to medically treat them alongside of Dr. David VanSickle.



Jamie Henry_cropped for websiteJamie Henry, MSN, APN, FNP-C, HNB-BC, CNRN

Nurse Practitioner

Jamie is a Nurse Practitioner who specializes in the care of our neurosurgical outpatients. She has spent much of her career in the neurosurgical setting, and joined Neurosurgery One after moving to Colorado in 2016. Jamie graduated with her Bachelor’s degree in Nursing from Xavier University in 2006, and became a board-certified Holistic Nurse that year as well—a certification she keeps active and continues to incorporate into her daily practice. She graduated with her Master’s in Nursing and Family Nurse Practitioner from Walden University in 2015, with a 4.0 GPA. Jamie is also a board-certified Neuroscience Nurse.

Jamie is often involved in the care of patients from initial assessment and diagnosis, through their post-operative follow up visits, and anywhere in between. She has a passion for individualized, patient-centered care, and is dedicated to empowering patients and their families through education, collaboration, open communication, and maintaining a therapeutic healing environment. She strives to ensure our patients and their families feel well-prepared before, during, and after neurosurgical procedures.

Jamie is an active member of multiple professional organizations and academic honor societies, including the American Academy of Nurse Practitioners, American Holistic Nurses Association, Sigma Theta Tau International Honor Society of Nursing, and Golden Key International Honor Society.



Laine Housand_cropped-1Laine Housand, MPAS, PA-C

Physician Assistant

Laine was born and raised in Southern California and earned her bachelor's degree in biological sciences at University of California, Irvine. She went on to work in spinal cord injury research for five years, which was what ultimately helped her fall in love with the brain, spine, and neurosurgery as a whole. After moving to the east coast to attend physician assistant school at Rutgers University in New Jersey, she worked as a neurosurgery PA for two years in Virginia. Her family recently relocated here to Colorado and she believes they are here to stay. Laine loves being a PA because she enjoys working together with patients, helping them improve their health and lives, and she takes great honor in being given the opportunity to be there for people in some of their most vulnerable moments. In her free time, she likes to spend time with her husband, daughter, and dog, practice yoga, and explore the outdoors.



Nermin Imsirovic, PA-C

Nermin Imsirovic was born in Sarajevo, Bosnia and Herzegovina, and moved to New Orleans in 1995. He completed his bachelor’s degree at Wake Forest University, and obtained his Master of Medical Science in Physician Assistant Studies from Midwestern University. His first job as a Physician Assistant was at a busy neurosurgery trauma center in Western Colorado where he assisted with various elective and trauma surgical procedures, performed neurosurgical procedures and took care of critically ill patients on the ICU/neuro floors, and was involved with an elective clinic where he evaluated and treated patients with various neurosurgical disorders. Upon moving to the Denver area, he also gained experience in orthopedic trauma surgery and procedures, as well as further neurosurgical experience that also involved extensive peripheral nerve training. He believes that each patient’s condition is unique and a diagnosis should not be performed via a sole modality such as diagnostic imaging, but rather through a complete picture that involves the patient’s history and personal goals, anatomy, physical exam, and additional diagnostics tests specific to the patient’s condition. Through his role at Neurosurgery One at St. Anthony Hospital, his primary role is to care for patients in the medical/surgical units as well as critical neuro/trauma patients in the Surgical Intensive Care Unit. In his free time, Nermin enjoys spending time with his family, skiing, hiking, mountain biking, as well as playing tennis and basketball.



Anna Jackson_cropped for websiteAnna Jackson MPAS, PA-C

Physician Assistant

Anna Jackson is a board-certified Physician Assistant specializing in neurosurgical care. Anna primarily works in our clinic, focusing on both pre- and post-operative care. She enjoys working with patients to develop an effective treatment plan that is individualized to each patient's concerns.

Anna received her Master of Physician Assistant Studies degree from Butler University in Indianapolis, IN. She also holds a bachelor’s degree in Health Sciences from Butler University and Biomedical Sciences from Grand Valley State University. She is a member of Pi Alpha Honor Society. Anna lives in the Denver area and enjoys all outdoor activities, including hiking, skiing, and snowshoeing.



Chris Jackson_cropped for websiteChris Jackson, MPAS, PA-C

Physician Assistant

Chris Jackson is a Physician Assistant specializing in neurosurgical care. He conducts clinical neurosurgical evaluations and examinations, assists Dr. Adair Prall in surgery, and cares for patients pre- and post-operatively. Chris is passionate about the field of neurosurgery and enjoys educating patients about neurosurgical conditions and treatments. His goal is to provide compassionate and personalized care for by treating patients as if they were members of his own family. As each patient is unique, it is his goal to listen and understand each patient in order to form a treatment plan that is tailored to each patient’s condition. Chris graduated from Butler University in Indianapolis, Indiana with a Master of Physician Assistant Studies degree. He holds bachelor’s degrees in Health Sciences from Butler University and Biomedical Sciences from Grand Valley State University in Allendale, Michigan. Chris is from the Denver area and enjoys playing hockey, hiking, snowshoeing, and skiing in his free time.



Cate McGraw_cropped for websiteCate McGraw, MS, APN, ANP-C

Nurse Practitioner

Cate McGraw is a board-certified adult nurse practitioner specializing in neurosurgery. Cate received her bachelor’s degree in nursing from University of Northern Colorado. As a bedside nurse, she cared for patients with acute spinal cord and brain injury at Craig Hospital in Englewood, Colorado. While working at Craig, she obtained her master’s degree from University of Colorado Health Sciences Center. Following her graduation, she worked for National Jewish in both the in- and outpatient pulmonary settings as well as critical care. She has been a member of American Nurses Association and American Academy of Nurse Practitioners for the last 10 years. She is active in SIG 30 (the advanced practice section of Colorado) and served as the treasurer from 2012 to 2014.

Cate is a Colorado native who enjoys exploring the outdoors with her husband and twin boys.



Kelly Mowrey 1_cropped for websiteKelly Mowrey, MS, APN, ANP-C

Nurse Practitioner

Kelly Mowrey is a Neurosurgery Nurse Practitioner with Neurosurgery One, specializing in the acute, inpatient management of patients with neurosurgical conditions. Before joining Neurosurgery One, Kelly worked in pulmonary medicine at National Jewish Health for 14 years. In this role, Kelly managed acute and chronic pulmonary conditions for patients with traumatic brain and spinal cord injury at the world-renowned Craig Hospital. Additionally, she managed chronic respiratory failure in patients with ALS at the Colorado Neurological Institute and was a spinal cord injury nurse practitioner and registered nurse at Craig Hospital.

Kelly has co-authored a chapter on the nursing management of spinal cord injured patients in a prominent Neurotrauma textbook and published an article regarding evaluating acute abdomen in a spinal cord injured patient in a neuroscience nursing journal.

Kelly graduated with high honors from the University of Colorado School of Nursing in 2005 with a Master’s degree in nursing and an Adult Nurse Practitioner degree. Her nurse practitioner training included a 3 month intensive practicum in Neurosurgery at Denver Health Medical Center. Kelly is passionate about the role of nutrition, specifically the use of a whole food/plant-based diet, in the prevention and treatment of disease.



Mary Sherman_cropped for websiteMary Sherman, MSN, APN, FNP-C

Nurse Practitioner

Mary Sherman is a nurse practitioner with Neurosurgery One, assisting with inpatient neurosurgical care at St. Anthony Hospital in Lakewood, CO. Mary has been a registered nurse within the St. Anthony Hospital System since 1977, with over 20 years of experience caring for patients on the medical/surgical units and then critical neuro/trauma patients in the Surgical Intensive Care Unit. In 1997 she completed a Master’s degree and Family Nurse Practitioner degree at the University of Colorado. Over the years, Mary has worked with many different neurosurgeons and has gained knowledge and experience in all areas of neurosurgery including, spine, cranial, trauma, neurocritical care and neurovascular care.

In her spare time, Mary enjoys spending time with her husband John and her grandchildren. Mary and John enjoy trips to the beaches of Mexico. Mary also enjoys reading, gardening and yoga.



Ashley Vanderjagt, PA_cropped for websiteAshley VanderJagt, MMS, PA-C

Ashley is a board certified Physician Assistant specializing in neurosurgery. She provides neurosurgical care to patients in both the outpatient and inpatient setting, including pre-operative and post-operative management, as well as assisting Dr. John Hudson in the operating room. Ashley received her Bachelor's degree in Integrative Physiology from the University of Colorado Boulder. Prior to PA school she was a Clinical Director for a non-profit and coordinated/participated in medical mission trips to Nicaragua. She graduated from St. Francis University in Loretto, Pennsylvania with honors receiving her Master’s of Medical Sciences degree and became board certified through the Red Rocks Physician Assistant Program in Lakewood, CO. Upon graduation she worked in orthopedic surgery for 2 years prior to transitioning into neurosurgery. Ashley is an active member of multiple professional affiliations including the American Academy of Physician Assistants and Phi Theta Kappa Honor Society. She has a strong passion for patient education and treating every patient like she would her own family. She demonstrates strong leadership and communication skills for interacting with a wide variety of professional and patient populations. She excels as a member of a multidisciplinary team and believes collaboration in medicine is the key to effective patient care.  

Ashley is a Colorado native living in the Denver area and spends most her free time with family and close friends. She enjoys traveling the world with her husband and exploring the mountains whenever possible including camping, hiking, and snowboarding.