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 to my patients in a comforting environment. I enjoy all aspects of dentistry, and nothing makes me happier than relieving my patients' pain while restoring their smiles. I treat all patients like family, and I would like them to view me as 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 Nation Dental Honor Society.

Life & Hobbies

Dr. Koester currently resides in Carterville, IL with his wife Andrea and son Oliver. In his free time, Dr. Koester enjoys hiking, playing tennis, and playing video games with his family.