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License & Identifications

A medical license is required for a doctor to practice medicine in a particular state. Requirements vary by state but most require, at a minimum, post-graduate training in the doctor’s specific specialty. An NPI number is a national identifier unique to an individual health care provider and is managed by the Center for Medicare & Medicaid Services (CMS).

Learn more about Dr. Robert Johnston:

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  1. Qualifications
  2. What's important to you

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Patient Reviews

Patient comments (2)

The overall average patient rating of Dr. Robert Johnston is Average. Dr. Johnston has been reviewed by 5 patients who have provided 2 comments. The rating is 2.5 out of 5 stars.

Patient Ratings
Ease of Appointment 3.7
Promptness 2.8
Courteous Staff 2.3
Accurate Diagnosis 2.3
Bedside Manner 1.9
Spends Time with Me 2.3
Follows Up After Visit 2.3

Specialties & Research

Dr. Robert Johnston, MD is board certified in Ophthalmology.

  • He has special expertise in 1 area:
  • Eye Cancer

Education & Awards

Dr. Johnston graduated from Johns Hopkins University, Baltimore.


Dr. Johnston has 4 hospital affiliations:

  • Samaritan Medical Center 
  • Canton-Potsdam Hospital 


  • Spanish

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Additional Information
Dr. Robert Maynard Johnston MD is a male Ophthalmologist, has 44 years of experience and practices in Ophthalmology.
Where does Dr. Robert M. Johnston practice?
Dr. Robert Johnston has 3 office locations.
Dr. Robert Johnston practices Ophthalmology near Massena, NY.
Additional practice locations include: Watertown, NY and Potsdam, NY.
See Massena Ophthalmologists.