Meet Our Team

Our friendly team is excited to meet you! We love welcoming patients of all ages to our office, and we maintain a cheerful and relaxed environment where you and your family can feel at ease. We invite you to call us at 541-451-1440 to learn more about our dental services in Lebanon, Oregon, and schedule an appointment with our experienced dentist, Dr. Dennis Clark. We look forward to helping you care for your smile!

  • Nancy Thomas
    Office Manager

    I have lived in Lebanon, Oregon since the early 70’s. After graduating from Lebanon Union High School, I went to LBCC where I became a Dental Assistant and have been working for Dr. Clark off and on since 1989.

    I have 3+ kids and 2 grandsons and I enjoy spending time with them all. Plus have a love for reading and sewing.

  • Heather Koffler
    Dental Assistant & Sterilization Tech

    Hi, my name is Heather. I was born and raised here in the Lebanon area. I have 3 sons and 2 grandchildren.  I enjoy riding motorcycles, hiking, painting, taking care of my 3 large dogs, and spending time with my loved ones. 

    I went to LBCC to obtain my Dental Assisting Certification, EFDA, and EFODA.  I have been with Dr. Clark and the team for a few years now.  As a Clinic Coordinator, I have many tasks such as ensuring a smooth flow in the clinic, ordering supplies, and taking inventory as well as chair side assisting at times.

  • Lecia Elverfeld
    Insurance Benefit and Eligibility Specialist

    My name is Lecia, and I’ve been working as Insurance Benefit and Eligibility Specialist for Dr. Clark since October 2019. 

    It’s been such a pleasure working with fellow employees and an employer who values not only our patients but also values each other.  I have three grown children who I love spending my time with.  I enjoy fishing, rockhounding, kayaking, gardening, and most anything outdoors. 

  • Dunia Hamdan

    My name is Dunia and I have been a Registered Dental Assistant since 2017 when I graduated from Cuyahoga Valley Career Center in Ohio.  I moved here to Oregon so that I could live with my boyfriend. I love to spend time outdoors and do woodburning art.   My goal as a Dental assistant is to make patients feel comfortable and at ease when they come to the dentist.

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Our Regular Schedule


7:00 am-3:00 pm


7:00 am-3:00 pm


7:00 am-3:00 pm


7:00 am-3:00 pm