About Us



Thank you for your interest in Mid-County Endodontic Group, PA. Our mission is to provide our community with extraordinary endodontic care in a safe and caring environment. We strive to exceed all expectations and will continue to be THE premier endodontic provider. Our practice achieves this though our compassion and integrity combined with contemporary technical expertise and patient care technology.

We are conveniently located in both Ridgewood and Westwood, in Bergen County, NJ.

We hope the information provided here will answer many of your questions about endodontic care.

Our Doctors

Our highly trained and experienced team of doctors and assistants will provide the highest standard of professional care in a safe and comfortable environment.

Jin Hahn, DMD

Dr. Hahn received her doctorate in dental medicine from the University of Pennsylvania and completed post-graduate training in endodontics at Columbia University School of Dental and Oral Surgery.
Dr. Hahn’s Full Bio »

Jeffrey Chen, DMD

Dr. Chen earned his degree in dental medicine from the University of Pennsylvania and was inducted into the Omicron Kappa Upsilon National Honor Society. He then completed his post-doctoral training in endodontics also at the University of Pennsylvania where he was the recipient of the Samuel R. Rossman Scholarship and the Louis I. Grossman Award.
Dr. Chen’s Full Bio »

Jason Sukbum Yoo, DDS

Dr. Yoo earned his degree in dental surgery from Columbia University College of Dental Medicine. He sought further education by attending General Practitioner Residency at New York Presbyterian Queens. During this time he practiced as a general dentist getting hands on experience in the field. Dr. Yoo’s post-doctoral training was completed at Marquette University where he obtained a specialty certificate in endodontics and additionally a degree in Masters of Science.
Dr. Yoo’s Full Bio »