• Dr.
    Mark C. LeMonnier

    Dr. LeMonnier's professional experience began with his Commission, as a Dental Officer, to the United States Public Health Service. He spent five years serving the Native American population in both hospital-based as well as community-based dental offices in New Mexico and Washington. As an Officer of the USPHS, he earned commendations for Outstanding Service and Leadership, as well as promotion to Lieutenant Commander. Following his selection for the Inactive Reserve Corps, he chose to continue his career in private practice. Since 1996, Dr. LeMonnier has been practicing in Maryland, the majority of those years serving the Frederick Community.

    Throughout his career, Community Service has remained a consistent theme. From his participation in Operation Outreach, while in dental school, to having been named Woodmont Academy's 2004 Volunteer of the Year, Dr. LeMonnier believes one's talents exist solely for the purpose of being shared.

    Dr. LeMonnier is currently participating in several professional associations as a member of the American Dental Association, the Maryland State Dental Association, the Frederick County Dental Society, and the Francis Scott Key Study Club.

    When not in the office, you can usually find Dr. LeMonnier just trying to keep up with his wife, two grown children, and his grandaughter.  From time to time he can also be seen on a golf course or hiding behind a good book. His family's support, broad background, continued up-to-date dental training and outstanding dental team are the sources of his passion for dentistry; ensuring that his patients receive the most comprehensive and advanced dental care he can provide.

  • Erin ~
    Registered Dental Hygienist

    Since joining our team in 2009, our hygienist, Erin, continues to earn compliments daily for her gentle hand and thorough cleanings. She loves helping you learn the best way to keep your smile healthy. Erin is a 2004 graduate of Allegany College of Maryland and a 2005 graduate of West Virginia University. 

    In her spare time, Erin and her husband enjoy renovating their home, and she’ll often be seen walking her crazy Weimaraner around downtown Frederick.

  • Dawn ~
    Administrative Coordinator/Clinical Assistant

    Dawn will greet you with a smile, schedule your visits and coordinate your insurance. She can also frequently be seen rocking babies, coloring with your kids, or arranging rides for our 'seasoned citizens.' With Dawn, it’s all about her family. When not volunteering at school, she’s usually chasing after her Australian Shepard or fabricating elaborate and creative Halloween costumes. Her sense of family permeates all that she does, so it’s natural that she’ll make you feel like part of ours. Dawn has been working alongside Dr. LeMonnier since 1998 and has lived here in the Frederick area since 2001.

  • Lindy ~
    Administrative Coordinator

    Lindy has been serving the dental community since 2009.  A graduate of the Hagerstown Community College Dental Assisting Program in 2011, she loves helping people and prides herself on making your entire dental experience comfortable. Spending time with her family is top on the 'to-do-list' of life, which of course includes her Boston Terrier, Jelly Bean. Lindy recently married her best friend of 10 years on New Year's Eve 2020, welcomed their first baby in 2022, and are expecting baby #2 in spring of 2023.

  • Chelsea ~
    Clinical Assistant

    Chelsea has worked in the dental field since 2016 as an oral surgery and clinical assistant. You can find her assisting the doctor with procedures, sterilizing equipment and making sure rooms are prepared for each patient. Her primary concern is always the care and comfort of every patient. She feels rewarded to know that she can help a patient through what can sometimes be a difficult experience by making it as pleasant as possible. She finds it exciting to know that every day at work will be different and bring new people, opportunities and experiences.
    A graduate of Towson University and a Washington, DC native, she has lived in the Frederick area since 2015 with her husband and three dogs. Outside of the office you can find her on the soccer pitch or singing karaoke. She also enjoys reading, hiking, traveling, horror movies, concerts and spending time with family and friends.

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Our Regular Schedule


9:00 am-6:00 pm


8:00 am-5:00 pm


8:00 am-5:00 pm


7:00 am-3:00 pm