Our Staff

We're here to help! Whatever it is that brings you to our office, we are here to make you comfortable and to bring you the latest in top notch dental treatment. 



Patricia A. DeMarco, DDS


Dr. DeMarco graduated from the University of MD Dental School in 1987 and completed an Advanced General Dentistry residency in 1988. Following her residency, she was an associate dentist in Eldersburg, MD and Mt. Airy, MD. A few years later, she began her own practice in Mt. Airy, MD and now joins Frederick Smiles in Frederick!

Dr. DeMarco offers a full range of dental services including general dentistry for adults and children, restorations, crown and bridge treatment, root canal therapy, bleaching, snoring appliances, extractions, selective periodontal surgery as well as full and partial dentures and implant placement.

Dr. DeMarco's office provides exceptional and comprehensive dental care in a comfortable, relaxed and friendly environment. Patients are treated in the same caring and professional manner that she would extend to family members. Her staff strives to listen to patient concerns, educate them on their oral health and ultimately improve their quality of life. In addition she takes special interest in helping the fearful or sensitive patient.​ 

In her free time, she loves spending time with her family. She also enjoys Zumba, yoga, cycling, swimming, reading and gardening.


Annika Mergner, RDH

Annika has worked with Dr. DeMarco for over 20 years. After studying at the American University she earned her degree in Dental Hygiene at Baltimore City Community College in 1996. Her gentle technique leaves even the most "dental phobic" patient happy. 


Annika is married, has a daughter, a granddaughter, and two dogs. She volunteers with the Damascus Help and Hospice Caring organizations, captains a women's USTA 4.0 tennis team and loves to travel. 




Janet Call, RDH

Janet has worked with Dr. DeMarco for 20 years. She earned her degree in Dental Hygiene from the University of Pittsburgh in 1984. Her caring manner helps her patients feel comfortable. 

Janet is married, has two sons, and a border collie named Maggie. She enjoys yoga, hiking, cycling, and meeting with her church group.

Terri Ballard, Assistant


Terri has been assisting Dr. DeMarco for 20 years. She is married, has two daughters, and two grandsons.  









Email:       demarcodental@verizon.net
Address:  150 Baughmans Lane

                 Frederick, MD 21702
Phone:     301-695-5454

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