Dr. S. Russell Mullen, DDS, MS, PC

Orthodontist And Owner
Dr. Mullen opened Mullen Orthodontics in 2004 and still loves seeing all his patients with beautiful smiles around town.

Being up-to-date in the latest orthodontic techniques and treatments for pediatric, adolescent, and adult patients has always been a priority for Dr. Mullen. He is well versed in Invisalign® and self-ligating bracket systems that can reduce treatment time and increase patient comfort, and uses the latest technologies in orthodontics to maximize smile aesthetics and give the best possible results to his patients. He is a Diplomate of the American Board of Orthodontics, an achievement earned only by about 25% of practicing orthodontists.

Dr. Mullen grew up in Springfield, Virginia as the oldest of four children. He went to the University of Virginia and earned a Bachelor of Arts in Biology. He then attended the Medical College of Virginia School of Dentistry, where he graduated Magna Cum Laude. While attending MCV, he was a member of Psi Omega dental fraternity and received the Fraternal Achievement award; an award given to the senior student who showed the most outstanding service during their four years of school. Dr. Mullen was also inducted into Omicron Kappa Upsilon, a dental honor society whose members are chosen by the faculty of the dental school. He then completed a three-year orthodontic residency at West Virginia University, and earned a Masters of Science in Orthodontics.

Dr. Mullen is a member of the American Dental Association, the Virginia Dental Association, the Northern Virginia Dental Association, the American Association of Orthodontists, and is a member of several dental and orthodontic study clubs. He was elected by his peers to serve as President of the Virginia Association of Orthodontists after being in practice for only 6 years. He is also one of 64 orthodontists in the nation to serve as a Delegate for the American Association of Orthodontists. Living and working in Leesburg with his wife and three young children, Dr. Mullen enjoys hiking, tennis, competing in triathlons, and mountain bike racing. You will see him out on the fields coaching his children most weekends.

  • Northern Virginia Magazine – voted by Dentists in the area as Top Orthodontist, 2014, 2016, 2017, 2018.
  • Washingtonian Magazine – voted by Dentists in the area as Top Orthodontist, 2017, 2018, 2019.
  • Virginia Living Magazine – chosen as Top Orthodontist 2017, 2018
  • *Diplomate, American Board of Orthodontics
  • Member, American Association of Orthodontists
  • Member, American Dental Association
  • Member, Northern Virginia Dental Association
  • Member, Virginia Dental Association
  • Past-President, Virginia Association of Orthodontists
  • Delegate, American Association of Orthodontists

*Honor achieved by only 25% of orthodontists


Our Office Manager
I have been with the practice since day one and thoroughly enjoy working with all our patients and their families. I live in Lovettsville with my family and enjoy spending time traveling, gardening and reading.


Orthodontic Assistant
I have been a dental assistant since 1993. I find it very rewarding to be part of a practice that has great patient relationships and helps to give people beautiful smiles. I live in Ashburn with my son, Adam, who is the light of my life. We love to spend time together, especially when I am coaching his soccer team. I also enjoy going to the gym, being outdoors, reading non-fiction, and finding new music.


Orthodontic Assistant
I have been working in dentistry for about 10 years. I have a fascination with teeth so dentistry was the perfect fit for me. I love helping patients achieve their smile goals. I have three children who are my world and I love spending time with them. In my free time, I love dancing and I’m an avid Latin dancer.

Anna Claire

Orthodontic Assistant
I’m from Charles Town, WV. I have been in ortho for 5 years and love seeing how happy our patients get when they get the smile they want. In my free time I love to go hiking and being outdoors.


Administrative Assistant
My daughter was a patient of Dr. Mullen’s and that is how I came to know the practice. I live in Ashburn, VA with my husband and daughter. If I’m not busy with an activity my daughter is involved in I enjoy spending time with with my friends and traveling to India to see my family.

Dr. Karrie Howard Mullen, DDS

Dr. Karrie Howard, Dr. Mullen’s wife, has practiced dentistry in Loudoun County since 2002. She doesn’t practice dentistry at Mullen Orthodontics, but will often be found helping things run smoothly throughout the office.