Dr. Olya Zahrebelny (pronounced Zara-bell-knee) graduated from the Faculty of Dentistry at the University of Toronto, Canada, then completed a General Practice Residency, focusing on oral surgery, oral medicine, and oral pathology. She practiced in both hospital and private practice environments for over three decades years.

Dr. "Z", as she is fondly called by her patients, is a former consultant to commercial and government insurance programs. She has also taught at three dental schools, in the Departments of Restorative Dentistry and Oral Medicine/Diagnosis, as well as holding the position of Attending Physician at Swedish Covenant Hospital for 19 years, and also an Attending Physician in the General Practice Residency program at the University of Illinois, Chicago Medical Center.

She has lectured extensively throughout the US at all the major dental meetings, as well as for state and local societies and study clubs, University continuing education programs, and hospital residents. Her articles on medical billing have been published in DentalTown, Dentist's Money Digest, Inclusive Magazine, Dental Economics, and Insurance Solutions. She has been teaching medical billing to dental offices for the past 27 years, and her book, "Accessing Medical Benefits in the Comprehensive and Surgical Dental Practice" has been in print for the last 20 years.

Dr. Z is a general dentist, with special interests in cosmetic and implant dentistry, and a Principal in The Z Group, a practice management consulting company, focused on training dentists on in-house medical billing.