Meet Our Team

For more than thirteen years, Dr. John C. Kromhout has served Columbus area patients with comfortable dental care built to last. As a third generation dentist, he looks forward to serving the Powell community.

Dr. Kromhout grew up in Hilliard, Ohio, then traveled to Miami of Ohio for his undergraduate degree. In 2004, he received his Doctor of Dental Medicine (DMD) from The University of Kentucky. Dr. Kromhout continues to participate in post-doctoral dental continuing education courses. He is a member of the American Dental Association (ADA), Ohio Dental Association (ODA) and Columbus Dental Society (CDS).

Dr. Kromhout lives in Powell with his wife Abbey and their three children. When he is out of the office, he enjoys running around with his kids and spending time with his family.



As our Practice Coordinator, Ashley takes great pride in meeting the customer relations needs of our practice. She looks for opportunities to make a difference and is particularly excited to welcome patients into our new practice.

Ashley earned a Bachelors Degree in Business Administration with a minor in Medical Office Management from Franklin University. She has spent several years in the dental field working in a dental lab as well as in a dental office. Ashley is able to provide high standards of service and reliability for our patients.

Outside of work, Ashley and her husband Jude enjoy socializing and spending time with family and close friends.



Ashlee is our Patient Coordinator. She graduated from Ohio University with a bachelors degree in Environmental Biology in 2014. Since then, she has decided to go back to school to pursue Dental Hygiene. She is excited to learn all the ins and outs of the dental world as she works on her degree and is very excited to meet all the Cornerstone patients!

In her free time, Ashlee enjoys visiting restaurants and breweries throughout Columbus with her boyfriend, Danny. She also enjoys spending lots of time snuggling their chocolate Labrador Retriever, Tucker.



Tiffani is our EFDA/Certified Dental Assistant. She has been working in the dental fiend since 1999. In 2010 she received her certification in Expanded Functions for Dental Auxiliaries (EFDA) giving her the training and capability to place restorations (fillings and sealants). She is passionate about placing restorations that make the patient feel great about their smile. Tiffani also takes great pride in building trusting relationships with our patients by explaining procedures and answering any questions they may have.

In her free time, Tiffani loves spending time with her husband, Jeff, and their daughter. They enjoy hiking, biking, rollerblading, BBQ and just hanging out with family and friends.




Allison is our Registered Dental Hygienist who graduated from CSCC with a Degree of Applied Science in Dental Hygiene. She is also licensed to administer local anesthesia and nitrous oxide sedation. She has a great interest in the field of dentistry and keeps her knowledge up to date by completing many hours of continuing education per year. She loves forming relationships with her patients and educating them on how to keep a healthy smile.

In her free time, Alli enjoys staying active by running, riding her bike and playing intramural volleyball. She also enjoys traveling, cooking and socializing with friends and family.




Jessica is a Registered Dental Hygienist with a passion for dentistry. As a graduate of CSCC, she has a Degree of Applied Science in Dental Hygiene and is licensed to administer local anesthesia and nitrous oxide sedation. She loves working with patients and meeting new people through her profession. Jess takes pride in providing the best individualized care possible to everyone she meets.

In her free time, she enjoys staying active through yoga and spinning classes. She also loves boating with family, trying new recipes and wine nights with friends.


Dr. John Kromhout