The Medical Group of Columbia is a Family Medical Office that provides full service medical care including pediatrics, adolescents, adults and geriatrics. Dr. Kennedy and Associates have been serving the people of Maury County for over 20 years.
Dr. Richard Douglas Kennedy
The Medical Group of Columbia is led by R. Douglas Kennedy, M.D., who has cared for families in the Columbia community for over 19 years. Originally from Greenbrier, Tennessee, Dr. Kennedy completed his undergraduate degrees at Lambuth University, where he played basketball. Dr. Kennedy is a 1997 graduate of University of Tennessee Medical School in Memphis and completed a Family Medicine residency in the University of Tennessee Baptist Healthplex program in Memphis where he served as chief-resident. Dr. Kennedy is certified by the American Board of Family Medicine. In addition to family practice, Dr. Kennedy is a FAA medical aviation examiner, DOT examiner and practices geriatric and hospice care in Maury, Lawrence and Giles counties. He is Medical Director of Poplar Estates Assisted Living, Amedysis Home Health and Avalon Hospice.


Dr. Kennedy and his wife, Jennifer, have made Columbia their home since 2000. The Kennedys and their four children, Kathryn, Cassie, Connor and Collin, enjoy playing sports and wake-surfing at the lake. Dr. Kennedy is a sports enthusiast and an avid golfer. He also gives back to the community by coaching local youth sports teams, baseball, softball, golf and basketball.



Please join Dr. Kennedy and Associates in welcoming our newest provider, Dr. Gavin Pinkston, home to Columbia! Dr. Pinkston is a Columbia native and a 2002 graduate from Columbia Academy. For college, Dr. Pinkston graduated from Freed-Hardeman (2006) before receiving his medical degree from the University of Tennessee Health Science Center College of Medicine in 2010. After a residency in Greenwood, South Carolina, Dr. Pinkston has been practicing in international medical missions in Vientiane Laos.


Dr. Pinkston, along with his wife Lauren and their three children, has recently moved to Columbia and he joined The Medical Group of Columbia in July. He is certified by the American Board of Family Practice and also holds a diploma of International Medicine and Public Health (DIMPH). The Medical Group of Columbia welcomes all patients including pediatric, adolescent, adult and geriatric.

Dr. Gavin Pinkston
Gina Graves, Nurse Practioner

Gina Graves is board certified as a Family Nurse Practitioner and Registered Nurse. She completed her bachelor’s in nursing at University of Tennessee Martin in 1995. While working in the Intensive Care Unit at Maury Regional Medical Center she continued to strive and returned for her Masters of Science in family practice as a Nurse Practitioner in 2000 from the University of Alabama Huntsville.


Gina began her nursing career 24 years ago at Maury Regional Medical Center focusing on patient care with a love for patients. She provides preventative care as well as care for chronic conditions, pediatrics, women’s health, behavioral health, and acute care treatment to patients of all ages. She believes that a partnership between provider and patient and education are the two of the most important aspects of primary care and improving the healthcare system. She is now accepting new patients from infants to geriatrics.

Mrs. Graves is married to Columbia native, Jerry Graves and they have two children. Outside of the office, Gina enjoys reading, painting, gardening and relaxing trips to the beach.



Peggy LeAnn King Schmidt was born and raised in the Spring Hill and Columbia area. She graduated from Spring Hill High School in 2006.  She attended Tennessee Technological University and graduated in 2010 with a Bachelor of Science in Biology with a health science concentration. After college, LeAnn went on to Lincoln Memorial University for graduate studies where she graduated in 2013 with a Master’s of Medical Science in Physician Assistant Studies and obtained certification through NCCPA.

 After graduation, LeAnn went on to practice in family medicine and urgent care. She joined Dr Kennedy and his associates in 2014 to continue working in family medicine in her hometown. LeAnn works closely with Dr. Kennedy to ensure health and wellness through preventative medicine. She is a member of the American Academy of Physician Assistants and Tennessee Academy of Physician Assistants.

During her free time, she enjoys spending time with her husband, Terry, family and friends. She also enjoys traveling and spending time outdoors.  


Leann Schmidt, Physician's Assistant


Brianna Seaver is a Family Nurse Practitioner from the American Academy of Nurse Practitioners. She recieved a Bachelor of Science in Nursing from Tennessee Technological University in Cookeville (2011) and a Master of Science in Nursing from University of Alabama, Huntsville (2015). 

Mrs. Seaver has experience in critical care, hospice and urgent care. She joined The Medical Group of Columbia recently. She is available in the office part-time and works with Dr. Kennedy providing primary care to patients at Pinewood Springs.

Brianna is a Lawrenceburg native, where she, husband, Clint, and their two small children reside. They love the outdoors, camping and kayaking in the summer time. She also has a love for baking and owns a food truck with a friend called "Honey Bundts."


Regina Walters is a board-certified Nurse Practitioner in Family Practice. After receiving an Associate degree in Nursing from Columbia State Community College in 2000, she graduated as part of the Honor’s Society with a Bachelor of Science in Nursing degree from Middle Tennessee State University in 2016. She then successfully completed her Master of Science in Nursing degree as an Advanced Practice Registered Nurse with a focus in Family Practice from Middle Tennessee State University in 2019. She was also a part of the Honor’s Society in her master’s program. She is currently board certified and is an active member of the American Academy of Nurse Practitioners. 

Regina’s focus is on long term care of the geriatrics and in addition works with palliative and hospice care. 

Regina and husband Brian, live in Leoma with their two children, Brianna and Mason. 

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