Warren Johnston, MD
Basic profileUniversity of California, Irvine Medical Center
Warren Johnston is a Cardiology physician affiliated with University of California, Irvine Medical Center. OpenAlex indexes 17 publications with 402 citations (h-index 10).
Overview
Scholarship
indexed output and impact (OpenAlex)Distinct works indexed by OpenAlex.
Total citations across indexed works.
Hirsch index, productivity × impact (OpenAlex).
Medicare prescribing footprint (2023)
The drugs this prescriber writes for Medicare patients, grouped by drug class and therapeutic area. Every percentage is a share of their total prescribing, so you can see what they prescribe most. These are proportions, not patient counts or dollar amounts. No condition is inferred: the claims record what was prescribed, never why.
Cardiovascular
86.3%Statin27.4%Rosuvastatin Calcium67%Atorvastatin Calcium27%Simvastatin5%Pravastatin Sodium1%Part D<11 patientsBeta blocker21.3%Metoprolol Succinate54%Carvedilol26%Metoprolol Tartrate13%Atenolol4%Sotalol2%Part D<11 patients+ 18 more classes in this area
Blood & clotting
11%Factor Xa inhibitor8.4%Eliquis87%Xarelto13%Part D≥109 patientsP2Y12 inhibitor2%Clopidogrel100%Part D≥39 patients+ 1 more class in this area
Metabolism & gastrointestinal
2.7%Potassium supplement1.8%Potassium Chloride100%Part D≥27 patientsSGLT2 inhibitor0.5%Farxiga100%Part D≥11 patients+ 1 more class in this area
Drug classes come from the WHO ATC and U.S. National Library of Medicine (RxClass) classifications; prescribing counts come from the CMS Medicare Part D Prescribers file. Each drug is counted once, under its primary class. Medicare fee-for-service only, so no Medicare Advantage, commercial, or pediatric prescribing is included. CMS publishes this data about 17 months after the fact.
Similar KOLs
Other experts from the same institution or the same specialty.
Krishnansu Tewari, MD
University of California, Irvine Medical Center
Ali Dabestani, MD
University of California, Irvine Medical Center
Christopher Paiji, MD
University of California, Irvine Medical Center
David Sato, MD
University of California, Irvine Medical Center
A basic profile from our physician directory: identity and practice contact from the federal NPPES registry, research from OpenAlex, trials from ClinicalTrials.gov, payments from CMS Open Payments — shown itemized where we have matched records, as a count where we only have a total. This person hasn't been through our full identity-adjudication pipeline yet, so funding, congress activity and public presence aren't shown. Absence of a section means “not yet looked,” never “none found.”