2101 Aspen Dr.
Mechanicsburg, PA 17055


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Meet Our Doctors

Charles R. Fields, D.D.S., M.A.G.D.

Dr. Fields graduated from Temple University School of Dentistry in 1983. Prior to this, he received a Bachelor of Science degree in Psychology and Biology from the University of Pittsburgh and attended Temple University School of Pharmacy.

After working two years as an associate dentist in a small practice, Dr. Fields established Fields Family Dentistry in April 1985. Founded on the basic principles of high-quality care and excellent patient relations, 30 years later, the practice continues to thrive.

Dr. Fields is certified with the National Board of Dental Examinations and North East Regional Board of Examinations. He is a Master in the Academy of General Dentistry and received the LLSR (Life Long Service Recognition) Award. In addition, Dr. Fields is a member of the American Dental Association, Pennsylvania Dental Association, Harrisburg Area Dental Society and the Academy of General Dentistry. He serves as Co-Chairman of the Advocacy Committee for the PAGD, Board of Directors for Clinicians Report Foundation and a CRA dental products evaluator for over 25 years.  Dr. Fields was the former dentist for the Harrisburg Heat Professional Soccer Team, Northern York School District and the Dental Assistant Advisor for Cumberland Perry Vo-Technical School. Dr. Fields was formerly affiliated with Health South Hospital, and Lifecare Rehabilitation Center.

Dr. Fields has been married to his high school sweetheart Vickie Ollinger Fields for 36 years. They have two daughters, Carissa Rae and Caylene Rochelle.

Tassia D. Masgalas, D.D.S.

Dr Tassia Masgalas is originally from Greece and moved to York, PA, at a young age, when her parents emigrated to the US. She maintains many of her customs and culture, thanks to being surrounded by an extended and close knit family.

She graduated from Spring Grove Senior High School and obtained her BS degree in Biology at Albright College, in Reading,PA.
She completed her DDS degree at Georgetown University School of Dentistry, in Washington, DC.

After living and practicing for several years in Maryland, she has returned to York to be closer and to help her aging parents.

She enjoys helping her patients obtain a healthy and radiant smile by providing the best possible care. Her main interest is in cosmetic alterations, thus offering Invisalign and veneers.

In her free time, she enjoys traveling, biking,  tennis, yoga, cooking various ethnic food and dancing Argentine tango.


Trevor J. McGerr,D.D.S.

Dr. Trevor J.  McGerr was born and raised in Lincoln, Nebraska.  He received his Doctor of Dental Surgery degree from the University of Nebraska Medical Center.  During his time in school, Dr. McGerr received a Health Professions scholarship from the United States Air Force.  Immediately after graduation, he started serving as a Captain in the Air Force.  Dr McGerr was stationed at Joint Base MDL in central New Jersey for three years, where he provided care  to all branches of the military.  He is a member of the American Dental Association, American Academy of General Dentistry, and the American Academy of Implant Dentistry. As a new resident of the Harrisburg area, he is looking forward to getting outdoors to do some backpacking and biking. In addition to reading about the latest in dental products, Dr McGerr is a tech and science news fanatic.  He recently joined the Harrisburg Young Professionals and will be involved in networking and volunteering in the community.