Dr. Mark Johnston, DMD

Dr. Mark Johnston, DMD

Orthodontics  ·  
Dr. Mark Johnston, DMD is an orthodontics practitioner in Marietta, GA and has been practicing for 32 years. He graduated from Medical College Of Georgia in 1986 and practices orthodontics and orthodontics & dentofacial orthopedics.Read his story

1070 Woodlawn Dr NE Ste 200

Marietta, GA 30068

Contact Information

Insurance Accepted

  • Assurant Health
  • Dental Network of America
  • United Concordia

*Please verify this information when scheduling an appointment.

Background Check

No malpractice claims found for Georgia
No disciplinary actions found for the years we collect data
No board actions found for the years we collect data
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About Me


"Here at Johnston Orthodontics, we strive to provide the highest quality of orthodontic care to our patients in and around the East Cobb and Marietta, Georgia area. Dr. Mark Johnston knows what a significant difference in health and self-esteem a beautiful smile can make, which is why Johnston Orthodontics is dedicated to giving each of our patients the beautiful smile they deserve!"

Practice Areas

  • Orthodontics
  • Orthodontics & Dentofacial Orthopedics


  • 1991
    University Of Alabama At Birmingham / School Of Dentistry
    Medical School
  • 1986
    Medical College Of Georgia
    Medical School
  • 1982
    University Of Georgia
    Undergraduate School

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Average Wait Time
  • 10 – 15 minutes
Dr. Johnston's Performance
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Insurance accepted

Accepted insurance can change. Please double-check when making an appointment.

Assurant Health
DHA Premier
Dental Network of America
Dental Network of America DPPO
United Concordia
Advantage Plus PPO
National Fee-for-Service