Meet Our Medical Providers

Dr. Richard Mays - Optimal Healthcare Knoxville

Dr. Richard Mays

Medical Director

Dr. Richard Mays MD is a family physician who has been in private practice in Knoxville, TN since 1978. He is board certified in two different medical specialties, the American Board of Family Medicine (ABFM) and the American Board of Obesity Medicine (ABOM). He is board eligible for the American Board of Integrative Medicine. He is a member if the American Academy of Family Physicians (AAFP), the Tennessee Medical Association (TMA) and the American Society of Bariatric Physicians (ASBP) as well as several other professional societies such as Who’s Who Among American Professionals.

Dr. Mays did his undergraduate training at University of the Cumberlands in Williamsburg, Ky from 1976-1980, where he double majored in Mathematics and Chemistry. While there he achieved the status of High Honor every year and was a member of the J.T. Vallandingham Society (the highest honor bestowed upon a student at the University of the Cumberlands). Dr. Mays then attended medical school at the University of Kentucky-Lexington where he graduated in the top 25% of the class in 1984. Dr. Mays completed his residency training program in Family Medicine at the University of Tennessee-Knoxville from 1984-1987.

In 2008, Dr. Mays authored “The Bible Diet” a book which discussed Biblical principles on healthy eating and disease prevention. Dr. Mays has traveled for speaking engagements on diet, nutrition, and healthy living all over the South-Eastern United States. Dr. Mays has special interest in nutrition, obesity, disease prevention as well as chronic conditions such as fibromyalgia, adrenal fatigue, diabetes, and other fatigue syndromes.

On a personal note: Dr. Mays has a strong faith in God and has taught at multiple churches the Biblical healing principles and spiritual laws. Dr. Mays is married to his wife of 38 years and has 3 beautiful adult daughters, 3 great sons-in-law, and three grandchildren. Dr. Mays enjoys organic gardening, hiking, photography, basketball, and antique collecting.

Dr. Sam Nia, DC

Dr. Sam Nia, DC

Doctor of Chiropractic

Dr. Sam Nia received his undergraduate pre-med work at East Tennessee State University. He received his Doctor of Chiropractic degree at Life University of Marietta, GA where he also completed his Internship and received his National Board of Chiropractic Examiners certification.

Since 1998, Dr. Nia has completed post graduate studies in advanced sports medicine and rehabilitation. He is also a certified corporate ergonomics trainer and strongly believes in being an excellent communicator with his patients in order to be an effective doctor. He has helped to treat over 40,000 patients as part of a mission trip to Russia and co-authored the book, “Improving Your Life Pro-Actively.”

On a personal note, Dr. Nia enjoys playing golf, snow skiing, and traveling.

Dr. Charlotte MacDonald, DNP, FNP-BC

Dr. Charlotte MacDonald, DNP, FNP-BC

Team Leader Nurse Practitioner

Dr. MacDonald pursued her Doctorate in Nursing Practice (DNP) degree with a focus on synthesizing evidence to improve clinical practice which she completed in August 2016. She is a board-certified Family Nurse Practitioner. She graduated with the Master of Science in Nursing (MSN) degree with a Family Nurse Practitioner concentration in 2011.

She practiced as a Registered Nurse in Critical Care prior to graduating as a Family Nurse Practitioner. Dr. MacDonald has been with Optimal Health for several years. It is her passion to help her patients improve their lives. She loves to travel with her husband, Scotty, and spend time with her family and friends.

John Wier - Optimal Healthcare Knoxville

John Wier, FNP-BC

Nurse Practitioner

John Wier NP-C joined Brown Chiropractic and Optimal Health in 2015 after graduating Lincoln Memorial Family Nurse Practitioner program. Before becoming part of the team he practiced as Emergency Medicine Registered Nurse at Methodist Medical Center in Oak Ridge, Tennessee for nearly a decade.

John has been married to his wonderful wife Katina for 19 years. He has no children but cherishes time spent with his wonderful nieces Adriana and Kasi. His hobbies include boating, shooting, and vacationing at the beach with family.

Misty Murphy, FNP-BC

Natlie Signaigo, FNP

Nurse Practitioner

Natalie graduated from the University of South Carolina’s Family Nurse Practitioner program with her Master of Science in Nursing in 2017. Prior to that, she completed her undergraduate degree at the University of South Carolina in 2011. She has since had valuable career experience as a nurse in medical, cardiovascular, COVID, and neuro intensive care units across the country. She has also practiced functional medicine as a Nurse Practitioner.

Natalie has a special interest in supporting the body’s natural ability to heal itself, as well as promoting prevention of chronic illness through healthy nutrition and lifestyle. She believes that when a person’s health is optimized, they can experience the life they truly desire and share their unique gifts with others. In her spare time, she loves spending time outdoors, playing with her two dogs, Olympic weightlifting, and attending baseball games with her husband, Nick.

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