Dr. Jefferies is excellent! He is very knowledgeable, has patience and knows how to talk to people. I must say, he is the "BEST" doctor I've found so far. I've lived in California, Hawaii, Louisiana and now here, no one has topped Dr. Jefferies. I wish there were doctors like him in other medical fields. I also recommend Mary Semancik, she does my 6 month cleaning. She reminds me of my mother... Nicole is another great asset to the this office. Keep up the great work.
I cannot top, can only join all the glowing comments by Dr. Jefferies patients. The first time I saw Dr. Jefferies was on Christmas Day(!!!). I was in a great deal of pain and when I called his emergency number, he immediately personally answered my call. In a calming reassuring voice he's asked me a few questions and has agreed to meet me at his office in the evening(!) - the only time I was able to get a ride. His knowledge, skills, professionalism and friendliness are of the highest standards. His office staff are nothing short of wonderful. I am keeping this dentist. Wouldn't you?
Dr Jeffeires is excellent. Very knowledgeable, patient oriented, and considerate. Our family of 7 have used him for years. His assistants are wonderful as well. We love Mary. His desk staff are very professional and always on top of things. I give my complete endorsement and couldn't be happier.
Dr. Jefferies is great! He's very knowledgeable, has patience and is an interesting person to talk to. He's by far the best dentist I've ever went to. He sees new patients, and then if everything is good, you come back in 6 months for a general cleaning with one of the Dental Hygienist of your choice. I personally recommend Mary Semancik. She's just as wonderful as Dr. Jefferies. I recommend Dr. Jefferies practice to everyone!
I didn't think I would fine another dentist as good as my dentist back in my hometown, but I did. Dr. Jefferies may seem young, but he is knowledgeable, professional, thorough, friendly and patient. He spent an hour and a half with me and did the cleaning portion himself (which he did a great job. My teeth felt like porcelain when he was done). He takes the time to explain things and he encourages you to ask questions. He won't sell you anything you don't need. He was even nice enough to bring me a couple of magazines when I had to wait. His staff is also great - very helpful and friendly. I would highly recommend Dr. Jefferies.
Dr. Mark S. Jefferies's Credentials
Accepting New Patients
Areas of Expertise
Awards & Recognitions
Publications & Research
Insurance accepted by this Doctor
Top Urgent Care Centers in Herndon, VA
Find a Doctor by Specialty
#1 of 66
#2 of 66
#3 of 66
#4 of 66
#5 of 66