Mosaic Medicine
Mosaic Medicine is a solo functional medicine practice located in Rapid City, South Dakota, founded and led by Dr. Alexia Gillen.
Dr. Gillen is a board-certified family physician (MD, Holistic & Integrative) with training in functional medicine, indicated by an Institute for Functional Medicine (IFM) credential shown on the site, along with affiliations with the American Academy of Family Physicians (AAFP) and the American College of Lifestyle Medicine (ACLM). Her background includes traditional primary care, urgent care, and executive medical leadership roles before founding Mosaic Medicine.
The practice’s primary focus areas are weight health, hormone balance, and gut health, with an additional line of aesthetics and skin health services. The website describes a functional and integrative approach centered on identifying the root causes of a patient’s health concerns rather than only treating symptoms, and Dr. Gillen shares that her own long-term struggles with weight and stress shaped her approach to patient care. The website does not mention CIRS, mold illness, multiple chemical sensitivity, or environmental toxin exposure specifically, so its relevance to a non-toxic living directory is based on its general functional medicine, root-cause philosophy rather than specific environmental illness expertise.
Services include extended appointments (up to 90 minutes) with a care team that includes a physician or provider, a health coach, and a nurse; personalized weight loss support; hormone optimization and hormone replacement therapy; gut health assessment and nutritional strategies; and a range of aesthetics and skincare treatments such as microneedling, laser hair removal, and neuromodulator injections (Botox, Xeomin). The website does not mention telehealth, so services appear to be in-person at the Rapid City office. Mosaic Medicine operates on a membership and cash-based model and does not accept insurance; the website does not mention HSA/FSA eligibility. A free discovery call is offered and prominently promoted throughout the site.