John Helzberg is a Gastroenterology physician affiliated with Saint Luke's Health System. OpenAlex indexes 62 publications with 755 citations (h-index 14).
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.
Metabolism & gastrointestinal
62.6%Rifamycin Antibacterial22%Xifaxan100%Part D<11 patientsProton pump inhibitor16.3%Pantoprazole Sodium100%Part D≥14 patients+ 3 more classes in this area
Cardiovascular
21.6%Aldosterone antagonist (MRA)9.7%Spironolactone100%Part D<11 patientsLoop diuretic6.6%Furosemide100%Part D<11 patients+ 1 more class in this area
Cancer & immunology
11%Purine Antimetabolite11%Azathioprine100%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.
- Sex, racial, and ethnic disparities in United States liver transplantation clinical trials
World Journal of Hepatology
2025 - Autoimmune Hepatitis and Vitamin D Deficiency: A Nationwide Perspective
Alimentary Pharmacology & Therapeutics
2024 - Applicability of Child-Turcotte-Pugh Score in Anticipating Post-ERCP Adverse Events in Patients With Cirrhosis
Journal of Clinical Gastroenterology
2024
Similar KOLs
Other experts from the same institution or the same specialty.
Timothy Pluard, MD
Saint Luke's Health System
Paul Chan, MD
Saint Luke's Health System
Bartosz Grobelny, MD
Saint Luke's Health System
Gurpreet Gandhoke, MD
Saint Luke's Health System
Charles Rice, MD
The Rockefeller University
Edward Loftus, MD
Mayo Clinic Rochester
Naga Chalasani, MD
Indiana University School of Medicine
Bruce Sands, MD
Icahn School of Medicine at Mount Sinai
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.”