About Your Dentist

Andrew J. Koester, DMD

"The thing I like most about dentistry is getting to help new people every day. Each day is different than the last, and it keeps life exciting."

My Mission

"I strive to deliver the highest quality dentistry possible and create positive dental experiences for my patients. I treat my patients like family and want to be a caring and trustworthy doctor."


Dr. Koester received his dental degree and graduated magna cum laude from Southern Illinois University School of Dental Medicine in Alton, IL. He received his undergraduate degree in Biological Sciences from Southern Illinois University Edwardsville in Edwardsville, IL.

Continuing Education & Professional Memberships

Dr. Koester is Invisalign and Laser certified. He is a member of the American Dental Association, Illinois State Dental Society, Delta Sigma Delta, and Omicron Kappa Upsilon National Dental Honor Society.

Life & Hobbies

Dr. Koester resides in Carterville, IL with his wife, Andrea, and two sons, Oliver and Ethan. In his free time, Dr. Koester enjoys working outdoors and spending time with his family.