Areas of Expertise
MediFind evaluates expertise by pulling from factors such as number of articles a doctor has published in medical journals, participation in clinical trials, speaking at industry conferences, prescribing and referral patterns, and strength of connections with other experts in their field.
Learn more about MediFind’s expert tiers
Find Dr. Johnston's expertise for a condition
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- Elite
- Genital HerpesDr. Johnston isElite. Learn about Genital Herpes.
- Distinguished
- Oral HerpesDr. Johnston isDistinguished. Learn about Oral Herpes.
- Experienced
- AIDS Dementia ComplexDr. Johnston isExperienced. Learn about AIDS Dementia Complex.
- AIDS Dysmorphic SyndromeDr. Johnston isExperienced. Learn about AIDS Dysmorphic Syndrome.
- COVID-19Dr. Johnston isExperienced. Learn about COVID-19.
- Cytomegalovirus InfectionDr. Johnston isExperienced. Learn about Cytomegalovirus Infection.
- GonorrheaDr. Johnston isExperienced. Learn about Gonorrhea.
- HIV/AIDSDr. Johnston isExperienced. Learn about HIV/AIDS.
View All 11 Experienced Conditions
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