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. Gregory Johnston:
View the full profile to get information on:
- What's important to you
View full profile
The overall average patient rating of Dr. Gregory Johnston is Below Average.
|Ease of Appointment||
|Spends Time with Me||
|Follows Up After Visit||
Prepare before visiting Dr. Johnston
Home Allergies Patient Education Learn all about home allergies and symptoms of mold, pet, dust and other types of indoor allergy issues with Vitals patient education guide.Before Visiting Dr. Johnston Learn More
Specialties & Research
- He has special expertise in 1 area:
- Flu (Human Influenza)
Education & Awards
Dr. Johnston graduated from Universidad Central Del Caribe, Bayamon.
Similar doctors nearby
- Additional Information
- Dr. Gregory Scott Johnston MD is a male General Practitioner, has 24 years of experience and practices in General Practice.
- Where does Dr. Gregory S. Johnston practice?
- Dr. Gregory Johnston has 1 office location.
Dr. Gregory Johnston practices General Practice near Phoenix, AZ.
See Phoenix General Practitioners.