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Shelbi Witt, Pharm D, is the founder of MAC Pharmacy and a trailblazer in the pharmacy industry. Her innovative, personalized care model has set new standards in Montana, reflecting her commitment to progressive healthcare.
Since 2016, Shelbi has specialized in bio-identical hormone therapy, practicing in Seattle, WA, Arizona, and her hometown of Great Falls, MT. She offers personalized treatment plans focusing on hormone therapy, gut health, micro-nutrient evaluation, and longevity.
Shelbi consults with both men and women, tailoring each plan to individual needs. From chronic pain to weight loss, her comprehensive approach ensures effective, year-long care plans. recognized as the 2022 George Roentsch New Innovator of the Year, Shelbi mentors fellow pharmacy owners and spearheaded the launch of MAC’s groundbreaking hormone clinic.
Well-connected with top professionals, Shelbi is dedicated to finding answers for her patients, with expert follow-up care managed by a dedicated nurse. She offers telehealth consultations and strives to accommodate new patients.
Kelly Timmer is double board-certified in women’s health and family practice, specializing in women’s health, adolescent care, and infertility care. She has extensive expertise in female hormones and low-dose naltrexone. Treating patients as if they are her own family, Kelly creates a trusting and welcoming environment where patients feel right at home.
Since beginning her practice in 1991, Kelly has formed powerful bonds with her patients through genuine warmth, compassion, and a determination to provide the highest quality care. Her dedication to maintaining long-term relationships has resulted in patients remaining under her care for over 25 years. Kelly’s legacy is her passion for wellness, continuous learning, lasting relationships, and managing autoimmune conditions.
Kelly’s commitment to personalized medicine ensures that she continuously advances her skills, staying at the forefront of technology and treatment strategies. She is passionate about empowering women to maintain optimal health, wellness, and success in their highest potential.
Born and raised in Portland, Oregon, Kelly received her degree at Montana State University. In her free time, she enjoys being with her husband, children, and grandchildren.
Carrie has been a Family Nurse Practitioner since 2001 and currently practices in the Family Medicine Department at Benefis Medical Group. In 2021, she established the nurse practitioner preceptor and residency program at Benefis. This program stands as one of the first in the nation to prepare graduates as residents and students. In 2023, Carrie was a finalist for Distinction Health Magazine’s Best Nurse Practitioner Award. And in 2024, she was nominated for the Outstanding Nurse Practitioner Preceptor Award by the University of Cincinnati.
In 2023, Carrie founded Pure Life Wellness, a practice focused on personalized medicine with an integrative approach to addressing the root causes of individual health needs. To further her professional development, Carrie pursued training in functional medicine, peptide therapies, and hormone therapies. She is currently obtaining a Life Coach certification through The Life Coach School.
Carrie’s career exemplifies a blend of clinical excellence, educational leadership, and a passion for creating relationships and empowering patients. She dedicates her practice to advancing health, healthcare, and fostering holistic health.
Kait Schallenberger is a board-certified nurse practitioner with over a decade of experience in critical care, cardiothoracic, and medical weight loss. Dedicated to empowering her patients, optimizing health, and promoting home optimization, Kait is passionate about helping others achieve vibrant and joyful lives.
Kait holds a Bachelor of Science in Finance from Liberty University and a Master’s Degree in Nursing from Vanderbilt University School of Nursing. Her career highlights include roles in cardiology, dermatology, and critical care, where she has consistently provided exceptional care while mentoring her team.
Based in Bozeman, Montana, Kait drives monthly to MAC for in-person patient visits while using telemedicine to follow up with her patients. Family time is her top priority, and she integrates the outdoors and community to achieve work-life balance. She also loves interior design, working on home projects, and inspiring her intellectual curiosity with a good book.
Kait Schallenberger’s holistic approach to patient care reflects her innovative commitment to enhancing well-being and empowering patients to be knowledgeable healthcare providers.
Alicia Hamilton, PA-C, is a military-trained Physician Associate (PA) who recently retired after 29 years of Army National Guard service. The autonomy of an austere environment coupled with training and experience taught her to trust her instincts. Fiercely patriotic, she believes in a model of choice in medicine.
As a Family Practice PA, she specializes in a myriad of conditions: blood pressure, thyroid, chronic pain, food or environmental sensitivities, hormonal imbalances, gut health, mental health, and more.
Her goal is to individualize medicine, giving her patients an opportunity to make informed decisions about their health and well-being based on the belief that knowledge is the best defense. She believes medicine should focus on treating the whole body with appropriate testing, reasoning, and providing answers — not simply reaching for the first solution.
You will feel empowered and educated to help yourself. As Hippocrates said, “Let food be thy medicine and medicine be thy food.
Sheridan graduated from Texas A&M College of Pharmacy in 2022 and completed a PGY-1 Community Residency with Magnolia Pharmacy in Magnolia, TX in 2023, learning alongside one of the leading compounding pharmacists in Texas.
During residency, she was able to learn more in-depth on hormone replacement therapy and other compounding options patients often struggle to find elsewhere. With a passion for personalized care, Sheridan uses her extensive knowledge of hormone compounding and dosage forms tailored to the unique needs of male and female patients. She also has experience formulating compounded skincare and supplements for individual needs.
Sheridan is currently working toward more diverse certifications in her field to enhance her role at MAC. She is deeply committed to helping patients achieve their health goals by prioritizing both physical and mental wellness. Her approachable demeanor and dedication ensure her patients always feel heard and cared for as she supports their journey.
Engineer and project manager turned pharmacist, Casey is a lifelong learner driven to continually seize new opportunities.
She has a hospital background with experience in anticoagulation, internal medicine, behavioral health, and oncology, among others, in institutions in Rhode Island, Maryland, New Mexico, and most recently Montana.
When her military husband’s move to Great Falls afforded her the chance to join the MAC team, who had at its core a holistic, proactive, and closely integrative approach to healthcare, Casey couldn’t pass it up.
She loves walking into MAC, where it’s evident they have fostered a sense of community and value the whole person; where voices are heard and empowered to find tailored meaningful outcomes to improve lives.
Compounding combines the problem-solving engineer side of her with the health and fitness enthusiast side; she’s excited for the continued growth and challenges it presents her to never stop learning.
Janell Murphy, RPh, has been an integral part of MAC Pharmacy since its inception. As Shelbi Witt’s preceptor during pharmacy school, Janell played a pivotal role in shaping Shelbi’s career, serving as both a mentor and an inspiration. Her dedication to the profession and her commitment to excellence have made her a vital figure at MAC and a trusted leader in the pharmacy community.
With years of experience in retail pharmacy, Janell has worked across the state, filling in for independent pharmacies and bringing her extensive knowledge to diverse patient populations. Her expertise in compounding has been instrumental in creating personalized solutions for patients, making her a go-to resource for complex and specialized care.
Janell is deeply respected in the Great Falls community, known for her warmth, professionalism, and unwavering dedication to her patients. Outside of work, she and her husband love spending quality time with their three children. Whether enjoying the outdoors or relaxing at their family cabin, Janell treasures every moment of downtime with her loved ones.
Janell’s wealth of knowledge and compassionate care make her a cornerstone of MAC Pharmacy and a beloved member of the team.
We are committed to delivering excellent service to our patients and doctors. We are ready to assist you with your health.
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