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Physician Directory

Dr. Mark A. Johnston, MD

Internal Medicine

  • 7515 Greenville Ave Ste 600
    Dallas, TX 75231
  • 1 Location
  • (214) 361-5432

Dr. Johnston's Overview

Dr. Mark A. Johnston graduated from the University of Texas Southwestern Medical Center at Dallas in 1984. He works in Dallas, TX and specializes in Internal Medicine and Public Health & General Preventive Medicine. Dr. Johnston is affiliated with Texas Health Presbyterian Hospital Dallas, USMD Hospital At Arlington and USMD Hospital At Fort Worth. He speaks English, Spanish and Vietnamese.

Gender: Male

Languages Spoken: English, Spanish, Vietnamese

Dr. Johnston's Experience

Years in Practice: 31

Conditions Treated by Dr. Johnston

  • Diabetes mellitus (DM)
  • Hypertension (HTN)
  • Acute bronchitis
  • Acute sinusitis
  • Acute upper respiratory tract infections
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Procedures Performed by Dr. Johnston

  • Electrocardiogram (EKG, ECG)
  • Immunization administration
  • Pulmonary function tests
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Dr. Johnston's Specialties

Internal Medicine, Public Health & General Preventive Medicine

Dr. Johnston's Education & Training

Medical School: University of Texas Southwestern Medical Center at Dallas; Graduated 1984

Dr. Johnston's Accepted Insurance

  • Aetna Choice POS II
  • Aetna HMO
  • Aetna Managed Choice POS Open Access
  • Aetna Signature Administrators PPO
  • BCBS Blue Card PPO
  • BCBSTX BlueChoice
  • CIGNA LocalPlus
  • CIGNA Open Access
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Dr. Johnston's Office Information & Appointments

Office Locations

Medical Clinic Of North Texas

7515 Greenville Ave Ste 600
Dallas, TX 75231
(214) 361-5432


Office Hours and Information

Fax: (214) 363-8710

Practice Website:

Accepting New Patients: Yes

Medicare Accepted: Yes

Medicaid Accepted: No

Monday 8:00 AM - 5:00 PM
Tuesday 8:00 AM - 5:00 PM
Wednesday 8:00 AM - 5:00 PM
Thursday 8:00 AM - 5:00 PM
Friday 8:00 AM - 5:00 PM
Saturday Closed
Sunday Closed

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