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MOSAIC Medicine

About Us

Welcome to MOSAIC Medicine, your trusted holistic medicine clinic in Rapid City, SD, serving the surrounding areas with personalized, integrative care. Our holistic medicine practitioners create a customized “mosaic” for every patient—blending evidence-informed therapies with whole-person support to help you feel your best from the inside out.

We specialize in women’s health, hormone balancing, gut health optimization, and weight loss management services designed to fit your life. Whether you’re looking for sustainable weight loss, structured weight loss management, or advanced options such as peptide injections—including BPC injections and GLP injections—our team partners with you to build a clear, supportive plan focused on your goals, your biology, and your long-term wellness.

Areas Served

Rapid City, SD | Hill City, SD | Spearfish, SD

What We Offer

Our Specialties include:

Our Services include:

Our Brands include:

Testimonials

On 4/10/2026 jenn gonzalez had this to say:
Alexia is the BEST!! I enjoy my visits with her and always look forward to them! She listens and looks at your whole picture and treats the underlying cause not just the symptoms which seems to be obsolete from Drs these days! She really cares!

On 4/8/2026 Kara White had this to say:
Dr. Alexia Gillen at Mosaic Medicine is truly incredible. Balancing the demands of grad school and work can really take a toll on my health, and she has been instrumental in helping me navigate those stressors. I especially appreciate her expertise in women’s health and hormone support; she doesn't just look at symptoms, but looks at the whole person to provide thoughtful solutions that are doable. I always leave her office feeling heard, supported, and empowered. We are so lucky to have a practitioner of her caliber here in Rapid City!

On 4/7/2026 Stacie Dietrich had this to say:
I cannot recommend Dr. Gillen enough! She truly makes you feel heard and takes the time to understand the full picture of your health. Her focus is on getting to the root of the issues rather than just treating symptoms. You can tell she genuinely cares about her patients and is committed to doing everything she can to help you feel your best.

On 4/5/2026 McKenna Alan had this to say:
Dr. Gillen has been my saving grace in my healing journey. She’s worked on finding the root cause and has been so kind to support me along the way! I am so thankful to her and am grateful for this healing journey!

On 3/24/2026 Jenn Landis had this to say:
Dr. Alexia Gillen is a phenomenal physician. I was recommended to her during a time of extreme discomfort. I was having temperature regulation issues, sleep issues, and severe brain fog. She was compassionate, comprehensive, and truly cared about getting my health back on track. I’m happy to say that just 2 months later, my symptoms are gone and I’m back to feeling like myself again! It may not sound like much, but I had been living in misery for more than 6 months and didn’t think I’d ever feel “normal” again. Dr. Gillen listened, understood, and was able to quickly turn things around for me. I can’t recommend her highly enough.

Contact Us

MOSAIC Medicine
2800 Jackson Blvd Suite 2 Rapid City, SD 57702
Phone: (605) 503-7020
Email: alexia.gillen@gmail.com

Where To Find Us

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Payment Types Accepted

American Express, Personal Checks, Debit Cards, Discover, MasterCard, Visa, Zelle

Our Hours

Holiday Hours May Vary. Please Call For Details.

Monday: 9:30 AM - 5:00 PM
Tuesday: 9:30 AM - 5:00 PM
Wednesday: 9:30 AM - 5:00 PM
Thursday: 9:30 AM - 5:00 PM
Friday: By Appointment Only
Saturday: By Appointment Only

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