Leon Fogelfeld is an Endocrinology/Metabolic physician affiliated with Cook County Health and Hospitals System. OpenAlex indexes 102 publications with 2,496 citations (h-index 28); ClinicalTrials.gov lists 5 registered studies matched to this name.
Overview
Scholarship
indexed output and impact (OpenAlex)Distinct works indexed by OpenAlex, matched via ORCID.
Total citations across indexed works.
Hirsch index, productivity × impact (OpenAlex).
Clinical & industry
trials, payments and federal fundingContact
The practice address and phone this provider lists in the federal NPPES (CMS) registry.
Practice address
1725 W Harrison St
Suite 250
Chicago, IL 606123841
Telephone
312-942-6163Provider last certified this registry record 1 Nov 2023.
Clinical trials
- Bridging the Gap by Transitional Care
Sponsor: Cook County Health
- Vitamin D and Inflammatory Markers of Cardiovascular Disease in African Americans With Type 2 Diabetes
Sponsor: Cook County Health
- Integrating Lifestyle Therapy for Diabetes Prevention Into Primary Care
Sponsor: Cook County Health
Registered studies on ClinicalTrials.gov where the overall official or a site investigator name-matches this physician, confirmed against known institution/geography. Latest few shown; the full list is part of the full profile.
Industry payments
4 companies reported payments to CMS in program years 2021 onward. These are public disclosures, not judgments. The latest:
- Dexcom, Inc.Program year20251 payment
- Tandem Diabetes Care, Inc.Program year20251 payment
- Corcept TherapeuticsProgram year20251 payment
Payment records matched to this physician's NPI in CMS Open Payments, program years 2021 onward.
Medicare prescribing footprint (2024)
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.
Metabolism & gastrointestinal
61.9%Insulin Analog21.3%Lantus Solostar33%Humalog Kwikpen U-10019%Toujeo Max Solostar12%Tresiba Flextouch U-20010%Lantus9%Basaglar Kwikpen U-1009%Fiasp Flextouch9%Part D<11 patientsGLP-1 receptor agonist11.6%Ozempic81%Mounjaro19%Part D<11 patients+ 4 more classes in this area
Cardiovascular
15.9%Statin7.1%Atorvastatin Calcium67%Rosuvastatin Calcium33%Part D<11 patientsCalcium channel blocker2.6%Amlodipine Besylate100%Part D<11 patients+ 3 more classes in this area
Hormonal (systemic)
13.6%l-Thyroxine9.4%Levothyroxine Sodium100%Part D≥21 patientsThyroid Hormone Synthesis Inhibitor4.2%Methimazole100%Part D<11 patients
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.
Publications
Matched to this physician's OpenAlex author record; most-cited works shown first.
Similar KOLs
Other experts from the same institution or the same specialty.
Thomas Lad, MD
Cook County Health and Hospitals System
Deimante Tamkus, MD
Cook County Health and Hospitals System
Grzegorz Pietrasik, MD
Cook County Health and Hospitals System
Katayoun Rezai, MD
Cook County Health and Hospitals System
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.”