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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- Distinguished
- Diabetic NephropathyDr. Johnston isDistinguished. Learn about Diabetic Nephropathy.
- Type 2 Diabetes (T2D)Dr. Johnston isDistinguished. Learn about Type 2 Diabetes (T2D).
- Advanced
- Alcoholic CirrhosisDr. Johnston isAdvanced. Learn about Alcoholic Cirrhosis.
- Chronic Obstructive Pulmonary Disease (COPD)
- CirrhosisDr. Johnston isAdvanced. Learn about Cirrhosis.
- Diabetic NeuropathyDr. Johnston isAdvanced. Learn about Diabetic Neuropathy.
- Diabetic RetinopathyDr. Johnston isAdvanced. Learn about Diabetic Retinopathy.
- End-Stage Renal Disease (ESRD)Dr. Johnston isAdvanced. Learn about End-Stage Renal Disease (ESRD).
View All 13 Advanced Conditions
- Experienced
- Acute CystitisDr. Johnston isExperienced. Learn about Acute Cystitis.
- Acute Eosinophilic PneumoniaDr. Johnston isExperienced. Learn about Acute Eosinophilic Pneumonia.
- Acute Interstitial PneumoniaDr. Johnston isExperienced. Learn about Acute Interstitial Pneumonia.
- Adrenal Insufficiency PediatricDr. Johnston isExperienced. Learn about Adrenal Insufficiency Pediatric.
- ALK-Positive Non-Small Cell Lung CancerDr. Johnston isExperienced. Learn about ALK-Positive Non-Small Cell Lung Cancer.
- Alopecia AreataDr. Johnston isExperienced. Learn about Alopecia Areata.
View All 145 Experienced Conditions
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