Dr. Mary Davis, DO, FMCP-M
As the founder and medical director of SuMa Medicine, a leading functional medicine practice in the greater Pittsburgh area, I specialize in treating the root cause of disease and dysfunction. Specifically, my practice focuses on chronic illness, autoimmune disease, mold toxicity, reproductive health, and optimizing total health and well-being.
Although I received conventional training in emergency and internal medicine, I am also certified in functional medicine by the Institute for Functional Medicine. This certification ensures that I am one of the most thoroughly trained and tested functional medicine doctors in my field.
While I have witnessed the life-saving wonders of modern medicine, I have also seen many patients suffering from chronic conditions without answers or relief from the cause of their illness. Unfortunately, chronic illness is on the rise, and diagnosis of diseases such as autoimmune disorders, environmental and food allergies, heart disease, diabetes, chronic fatigue syndrome, mood disorders, and autism are also increasing at an alarming rate.
Conventional medicine often focuses on mitigating and suppressing symptoms rather than investigating and treating the root causes of illness. In contrast, my approach is personalized to each client’s unique needs since imbalances and symptoms can manifest from many different causes.
Working together, our goal is to investigate the underlying causes of illness and create a path forward that we both believe will lead to better health and wellness.
Beyond my medical residency training, as well as the certification through The Institute for Functional Medicine, I continue to expand my knowledge to better help patients. My mentors/educators include:
- Dr. Neil Nathan – https://neilnathanmd.com/
- Dr. William Walsh – https://www.walshinstitute.org/
- Dr. Jill Crista – https://drcrista.com/
- Dr. Datis Karrazhian – https://kharrazianinstitute.com/
- Dr. Sam Yanuck – https://cogenceimmunology.com/
- Dr. Regina Druz/Integrative Cardiology-Holistic Heart Centers/Statin Over Prescribing Solutions –https://holisticheartcenters.com/
- Dr. Bruce Hoffman – https://www.drbrucehoffman.com/
- Dr. Klinghardt – https://klinghardtinstitute.com/
Professional Credentials
Licenses & Certifications
- Institute of Functional Medicine, Certified Practitioner
- West Virginia School of Osteopathic Medicine, Doctor of Osteopathic Medicine
- Charleston Area Medical Center Rotating Internship
- American Board of Internal Medicine, Board Certification
- International Society for Environmentally Acquired Illness, Full Member
- Pennsylvania Licensed Medical Acupuncturist
- Medical Qigong Therapy
- Chief Resident Emergency/Internal Medicine Program, Allegheny General Hospital 2004-2005
Education Background
- West Virginia School of Osteopathic Medicine
- Allegheny General Hospital Emergency–Medicine/Internal Medicine Residency Program
Rebecca Stanionis, MS, CHC CPT
Certified Health Coach & Personal Trainer
SUMA Medicine Health Coach
As a certified health coach and personal trainer, I specialize in empowering individuals managing chronic illnesses to reclaim their health and vitality. With a deep understanding of the challenges that come with long-term health conditions, I am passionate about guiding clients on their unique wellness journeys.
Having been personally affected by psoriatic arthritis and chronic Lyme disease, I know firsthand how overwhelming it can feel to navigate these conditions. My own experience fuels my dedication to providing compassionate, doctor recommended, science-backed support tailored to each individual’s needs. Through personalized movement routines, nutrition guidance, and holistic wellness strategies, I help clients build resilience and improve their quality of life. I’m here to take Dr. Mary Davis’ healing plan recommendations and help put them into action, working alongside Dr. Davis to support clients on their healing journeys.
Dr. Rosanne Bloom, DDS, MS, NBC-HWC, FMCHC
Rosanne Bloom is an Orthodontist, National Board Certified Health & Wellness Coach, Functional Medicine Certified Health Coach, Certified Breathwork Coach, and Practitioner for Stress, Anxiety, and Self-Regulation. Her journey into Functional Medicine began with her son’s complex health challenges, which inspired her to explore a more holistic approach to healing.
Rosanne earned her DDS from the University of Maryland School of Dentistry and completed a three-year Orthodontic residency and Master’s in Oral Biology at the University of Florida. After 27 years in orthodontic practice, she transitioned to Functional Medicine to help others optimize their health and well-being through personalized, root-cause-focused coaching.
Her work centers on the six pillars of health—stress, sleep, nutrition, movement, light, and relationships—empowering clients to make sustainable lifestyle changes that support balance and vitality. She has a special passion for nervous system regulation, breathwork, circadian biology, and helping clients gently reduce their toxic load through practical, mindful living.
Rosanne takes time to understand each client’s unique story and guides them toward clarity, balance, and lasting wellness.
Outside of work, she enjoys spending time in nature, hiking, playing tennis, reading, cooking, and being with her husband, adult sons, and dog.
Ready for a holistic, natural approach to your health and wellness?
Talk With Dr. Mary Davis about your current health and goals.