John Schaffner is a Gastroenterology physician affiliated with Mayo Clinic. OpenAlex indexes 21 publications with 688 citations (h-index 7).
Overview
Scholarship
indexed output and impact (OpenAlex)Distinct works indexed by OpenAlex.
Total citations across indexed works.
Hirsch index, productivity × impact (OpenAlex).
Contact
The practice address and phone this provider lists in the federal NPPES (CMS) registry.
Practice address
200 1st St SW
Rochester, MN 559050001
Telephone
507-284-2511Provider last certified this registry record 24 Jan 2025.
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
81.7%Proton pump inhibitor23.1%Omeprazole55%Pantoprazole Sodium45%Part D<11 patientsOpioid Agonist15.3%Loperamide100%Part D≥15 patients+ 5 more classes in this area
Anti-infectives
12.7%Tetracycline-class Drug12.7%Doxycycline Monohydrate100%Part D≥15 patientsCardiovascular
5.7%Bile Acid Sequestrant5.7%Colesevelam Hcl100%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.
- A Case of Abdominal Discomfort Caused by Benign Multicystic Peritoneal Mesothelioma
Clinical Gastroenterology and Hepatology
2016 - Erythema multiforme, Steven-Johnson syndrome and toxic epidermal necrolysis
Zurich Open Repository and Archive (University of Zurich)
2012 - Random Video File Peer Review to Assess Quality of Colonoscopy
The American Journal of Gastroenterology
2008
Similar KOLs
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S Rajkumar, MD
Mayo Clinic
Bradley Boeve, MD
Mayo Clinic
Rick Nishimura, MD
Mayo Clinic
Victor Montori, MD
Mayo Clinic
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.”