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Care Team: Meet Our Doctors

The Team

Currently not accepting New Patients

Dr. Elizabeth Bierer

Family Medicine

A graduate of Blue Ridge High School, Dr. Bierer attended the University of Arizona, where she received her Bachelors of Science in Psychology. She spent a year at AmeriCorp Vista in South Carolina before returning to the U of A where she earned her medical degree in 2008. With over 10 years of experience under her belt, Dr. Bierer is board certified and enjoys the full spectrum of Family Medicine.

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Currently not accepting New Patients

Dr. Sean Smithson

Family Medicine

Board certified in Family Medicine, Dr. Smithson received his medical degree from the University of Arizona and has over 12 years of experience in medicine.  A native to Holbrook, Dr. Smithson feels that family physicians play a vital role in patients' lives and enjoys treating patients and families at all stages of life.

MaryJane "Mimi" Sorenson, RN, BSN, MSN, FNP-BC

Family Medicine

Family Nurse Practitioner

Mimi Sorenson is a board certified Family Nurse Practitioner.  She graduated with a Master of Science in Nursing specializing as a Family Nurse Practitioner in 2018 from Grand Canyon University.  She has been with Premier Mountain Healthcare since 2022.  She has been a nurse for 20 years and has specialized in trauma, transplants, critical care and currently family practice.  She is a native to this community; born and raised.  She works hard to stay abreast with changes in medicine and continuing education to further provide the best she can living and serving an underserved community.  Her family is very important to her as she is a wife and mother of 5 children.  She loves to camp, hunt and travel to new places.  Her goal is to continue to provide the best care possible within her scope of practice to her community.   


Lyndsay Funk, FNP-C

Family Nurse Practitioner

Lyndsay grew up in the White Mountain and began her medical journey in college, while studying for her

nursing degree. After time in physical therapy, she transitioned into the hospital environment working in

Dallas, Tx and Tucson Az. In 2009 she graduated with a Bachelor of Science in Nursing from Grand

Canyon University. 13 years of nursing was spent in critical care until she graduated in 2021 with a

Master of Science in Nursing – Family Nurse Practitioner. She has a passion for integrative medicine and

a goal of overall wellness to meet the needs of her patients. In her free time, she enjoys hiking,

kayaking, traveling, lake time, and being with her loved ones – including her dog Mack.

Kimberly Hansen, FNP-C

Family Medicine

Family Nurse Practitioner

Kimberly Hansen FNP-C is a Board-Certified Family Nurse Practitioner and has been with Premier
Mountain Healthcare since 2021. Prior to working with PMH, Kim has worked as a
nurse for over 16 years in various areas of health care to include critical care, emergency medicine,
pediatrics, and women’s healthcare. Kim has had the experience of caring for individuals of all ages
both in a pre-hospital setting and within the hospital in both critical care and non-critical care settings
over the course of her career.
Kim obtained her Master of Science in Nursing to become a Family Nurse Practitioner at Grand Canyon
University. She has also obtained specialized training in Naturopathy and Herbology through Trinity
School of Natural Health in Indiana. Kim is proficient at combining her background in various
naturopathic modalities with current evidence-based practices, when appropriate, in order to provide
the type of care each patient desires.
Kim is dedicated to providing individualized care to her patients to enable them to live full and enriching

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Kimberly Novak, FNP-C

Family Medicine

Kimberly Novak, is a board certified Family Nurse Practitioner with specialized training in emergency, pediatric, and women’s health during her time spent working alongside local physicians. As an Arizona native, born in Kingman, raised in Payson, and currently residing in Saint Johns; she understands the needs of patients in our rural area and the struggles that come with it. As a mother of 4 children (3 living), a daughter, and a wife, she understands that the need for family centered care and need for a provider you can rely on and trust.


Her goal is to provide timely and competent medical care. When she’s not at work you can find her spending time with her family, gardening, hunting, or hiking.

Jay Kempton, FNP-C

Family Medicine

Jay Kempton is a board-certified Family Nurse Practitioner (FNP) with extensive experience in prehospital, critical care, and emergency department settings. Jay is committed to providing compassionate and comprehensive care, focusing on preventative medicine, patient education, and lifestyle modifications to promote long-term wellness.


With a deep-rooted passion for functional medicine, Jay's holistic approach emphasizes addressing the root causes of illness rather than just treating symptoms, integrating the latest medical advancements with natural therapies. Passionate about functional medicine, Jay tailors personalized treatment plans to meet the unique needs of each patient, encouraging physical activity and overall well-being. He lives by the motto "Movement is Medicine."


With a warm and caring demeanor, Jay builds strong relationships based on trust, respect, and open communication. Schedule an appointment to experience the difference that functional medicine can make in your health and well-being.

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