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Meet Our Providers

Andrew J. Slavico, MD

Andrew J. Slavico, MD

Dr. Slavico obtained his Bachelor in Science degree from Columbus State University in Columbus, Georgia and his Doctorate in Medicine from Mercer University School of Medicine in Macon, Georgia. He has been in practice in Georgia since 1993 and at Walnut Creek Family Practice since 1999. Dr. Slavico is a certified Medical Review Officer (MRO), one of the few in Henry County. He is qualified to administer and interpret DOT drug screenings. Dr. Slavico and his wife Kathy have one child, and enjoy the Georgia area. His hobbies include gardening, fishing, reading and when possible, traveling.


Mark Whitmer, PA-C

Mark Whitmer, PA-C

Mark Whitmer grew up in a small town in Illinois. He received a Bachelor of Science degree in biology/psychology/chemistry from Valparaiso University in Indiana. After graduation, he worked as an EMT at Northwest Community Hospital in Arlington Heights, Illinois.

Mark received a Master of Science in Physician Assistant Studies from Emory University in 2004. He then worked in Piedmont Hospital's Emergency Department for several years prior to joining Walnut Creek Family Practice in January 2008.

When he is not working, Mark enjoys seeing the world, spending time with family and friends, participating in triathlons, and good wine.


Lisa N. Butters, PA-C

Lisa N. Butters, PA-C

Lisa Butters was born and raised in Littleton, Colorado. She attended Colorado State University where she obtained her Bachelors and Masters degrees in Biomedical Sciences. She then ventured to Phoenix where she received a Master of Science in Physician Assistant Studies from Midwestern University in 2016.

Lisa worked in Peoria, Arizona at a family medicine clinic for two years before moving to Atlanta with her husband and dog. She joined Walnut Creek Family Practice in November 2018. Lisa is an avid dog lover who enjoys the beach, hiking, and spending time with her family and friends.