Meet our Team

Mary Brittain Blankenship, MD, FAIHM

Dr. Mary Brittain Blankenship is the founder of Spruce MD. She is a board certified Internal Medicine and Integrative Medicine physician. Dr. Blankenship’s passion for Integrative Medicine stems from a desire to provide medical care that is proactive rather than reactive, with a focus on lifestyle changes to reverse chronic disease. 

Dr. Blankenship completed medical school at the University of South Alabama and trained in Internal Medicine at the University of Utah. She completed a two year fellowship in Integrative Medicine through the Academy of Integrative Health and Medicine and was the first board certified Integrative Medicine physician in the Upstate. She has experience in both hospital medicine and cardiovascular inpatient medicine. She also has expertise in utilizing technology to improve the delivery of medical care.

Spruce MD allows Dr. Blankenship the necessary time to provide care and education, enabling patients to make impactful changes in their health. She has clinical expertise in gut health, hormones, skin issues, and chronic disease management and reversal (hypertension, diabetes, etc.).

For self-care, Dr. Blankenship enjoys running, road and mountain biking, yoga and traveling. She is an avid cook and voracious reader and can be found on weekends hanging with her husband and three kids.

Jeanne Shiffman, MD

Dr. Jeanne Shiffman is a board certified Family Medicine and Integrative Medicine physician. She has over 15 years experience practicing Integrative Medicine and focuses on forming caring and collaborative relationships with patients to improve health outcomes.

Dr. Shiffman completed medical school and residency training at Georgetown University. In addition, she is a Certified Functional Medicine Practitioner and a Certified Menopause Practitioner. Dr. Shiffman treats most medical issues and has clinical expertise in thyroid health, menopausal health, adolescent health, hormones, and fatigue. 

Dr. Shiffman recently moved to the Upstate from the DC area and enjoys exploring her new city. During her time away from Spruce MD she enjoys rooting for Clemson, practicing yoga, and hanging out with her dogs, Eloise the pug and Clementine the English bulldog. 

Cynthia Boswell, Nurse Practitioner

Cynthia Boswell is a board certified adult Nurse Practitioner with expertise in hormone, thyroid, geriatric, and chronic disease management. Cynthia’s fellowship in functional medicine is through the Academy of Anti-Aging Medicine.

Cynthia holds a BS in nursing from Emory University and a Masters in nursing from Clemson University. Cynthia has lived in the Upstate for over 20 years and loves spending time with her family. She is a Barre3 instructor, enjoys road and mountain biking, and running.

Katherine Taylor, RD, LD

Katherine is a registered and licensed dietitian with over 25 years experience in nutrition counseling. In addition to her degree in Coordinated Dietetics, she has advanced training from the Kalish Institute and uses both lifestyle medicine and functional nutrition to develop patient centered treatment plans. Katherine is also a certified LEAP therapist (CLT) with expertise in developing anti-inflammatory diets to address medical conditions. Katherine believes that proper assessment and nutritional guidance can transform health and create vitality at any age.

Katherine enjoys all things outdoors including hiking, kayaking and gardening. She loves spending time with her three sons on Lake Jocassee and is also an ardent reader.

Becca Barringer, Health Coach

Becca is a certified Health Coach and joins Spruce MD from Raleigh where she began her health coaching career. She completed her training through the Institute of Integrative Nutrition and is also a certified yoga instructor. Becca approaches her job as an accountability coach, helping patients tease out barriers to change to achieve goals. In her free time, Becca loves exploring the mountains, creating in the kitchen, dabbling in painting, and hanging out with her husband and dog Kevin.

Nathaniel West, Practice Manager

As Practice Manager, Nathaniel translates challenges into questions and answers into actionable insights. Being well-versed in identifying problems and keeping deadlines, he is proactive, naturally energetic, and invigorated by the ever-changing demands of the medical industry. There’s nothing more important to Nathaniel than a satisfied customer and the smell of freshly roasted coffee beans. 

When he is not heading off to work, you’ll find him spending quality time with his wife, one-year-old so, and two fur babies. Music plays a big part in his life – both listening to it and teaching it. 

If you ask Nathaniel what is important in life, he would answer…keeping it simple and brunch. 

Rebecca Milling, Patient Coordinator 

Rebecca is one of Spruce MD’s Patient Coordinators. Originally from the Upstate of South Carolina, she hopped around for her husband’s job to Nashville, Austin, and Chicago before eventually landing back in Greenville. She is the go-to for questions about how care at Spruce MD works, billing and supplement purchases. Rebecca enjoys the beach, live concerts, and spending time with her husband and two kids. 

Kim Zimmer, Patient Coordinator

Kim Zimmer relocated from the San Diego area following her husband’s retirement from Federal Law Enforcement. Kim has spent over 32 years in the healthcare industry in various front and back-office roles. In her off time, Kim enjoys attending Furman basketball games, exploring her new hometown, spending time with her two sons, and keeping us all laughing in the clinic!