John Friedewald is a Nephrology physician affiliated with Northwestern University. OpenAlex indexes 242 publications with 7,781 citations (h-index 45); ClinicalTrials.gov lists 3 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
675 N Saint Clair St
Galter 17-200
Chicago, IL 606115975
Telephone
312-695-8900Registry record last updated 6 Jul 2009.
Clinical trials
- Correlation of Donor-specific Anti-endothelial Cells
Sponsor: Northwestern University
- Proteogenomic Biomarker Panels in a Serial Blood & Urine Monitoring Study of Kidney Transplant Recipients
Sponsor: National Institute of Allergy and Infectious Diseases (NIAID)
- Urine Testing to Detect Kidney Transplant Rejection
Sponsor: National Institute of Allergy and Infectious Diseases (NIAID)
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
9 companies reported payments to CMS in program years 2021 onward. These are public disclosures, not judgments. The latest:
- VERTEX PHARMACEUTICALS INCORPORATEDProgram year20256 payments
- SANOFI-AVENTIS U.S. LLCProgram year20254 payments
- One Lambda, Inc.Program year20252 payments
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.
Anti-infectives
43.7%Short-acting sulfonamides39.8%Sulfamethoxazole-Trimethoprim100%Part D≥118 patientsCytomegalovirus Nucleoside Analog DNA Polymerase Inhibitor2.4%Valganciclovir Hcl100%Part D≥12 patients+ 1 more class in this area
Cardiovascular
23.7%Calcium channel blocker8.4%Amlodipine Besylate63%Nifedipine Er37%Part D≥22 patientsBeta blocker7.8%Carvedilol82%Metoprolol Succinate18%Part D<11 patients+ 4 more classes in this area
Metabolism & gastrointestinal
21.3%Corticosteroid14%Prednisone100%Part D≥38 patientsH2 blocker4.9%Famotidine100%Part D≥17 patients+ 2 more classes 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.
NIH funding
1 NIH research award on record, funded 2022–2025 per NIH RePORTER. The latest:
- Integrating a culturally competent APOL1 genetic testing program into living donor evaluation
Northwestern University
FY2025$630,645R01DK128207 - Integrating a culturally competent APOL1 genetic testing program into living donor evaluation
Northwestern University at Chicago
FY2024$624,286R01DK128207 - Integrating a culturally competent APOL1 genetic testing program into living donor evaluation
Northwestern University at Chicago
FY2023$662,783R01DK128207
Awards in the NIH RePORTER records where a principal investigator name matches this physician at an organization in their practice state. Latest award years shown; each row links to the project record on RePORTER.
Publications
Matched to this physician's OpenAlex author record; most-cited works shown first.
- The Banff 2022 Kidney Meeting Work Plan: Data-driven refinement of the Banff Classification for renal allografts
American Journal of Transplantation
2023 - Prognostic Biomarkers in Kidney Transplantation: A Systematic Review and Critical Appraisal
Journal of the American Society of Nephrology
2023 - Combining Blood Gene Expression and Cellfree DNA to Diagnose Subclinical Rejection in Kidney Transplant Recipients
Clinical Journal of the American Society of Nephrology
2021 - The failing kidney allograft: A review and recommendations for the care and management of a complex group of patients
American Journal of Transplantation
2021
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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.”