Gerard Mullin is a Gastroenterology physician affiliated with Johns Hopkins University. OpenAlex indexes 267 publications with 5,832 citations (h-index 42); ClinicalTrials.gov lists 1 registered study matched to this name.
Overview
Scholarship
indexed output and impact (OpenAlex)Publications indexed by OpenAlex, matched via ORCID. Counts exclude supporting files.
Citations across these publications.
H-index from these publications.
Clinical & industry
trials, payments and federal fundingContact
The practice address and phone this provider lists in the federal NPPES (CMS) registry.
Practice address
Telephone
Practice address and telephone from the federal NPPES registry.
Sign in to view contact details →Clinical trials
- Irritable Bowel Syndrome Evaluation and Treatment in Primary Care
Sponsor: American Academy of Family Physicians
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
2 companies reported payments to CMS in program years 2021 onward. These are public disclosures, not judgments. The latest:
- Braintree Laboratories, Inc.Program year20241 payment
- AIMMUNE THERAPEUTICS, INC.Program year20241 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
87.8%Proton pump inhibitor55.1%Pantoprazole Sodium52%Omeprazole48%Part D≥20 patientsH2 blocker13.6%Famotidine100%Part D<11 patients+ 2 more classes in this area
Blood & clotting
12.2%Solutions for parenteral nutrition12.2%Peg 3350-Electrolyte100%Part D≥18 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.
- Dietary Interventions for the Treatment of Inflammatory Bowel Diseases: An Updated Systematic Review and Meta-analysis
Clinical Gastroenterology and Hepatology
2022 - Quantity does not equal quality: Scientific principles cannot be sacrificed
International Immunopharmacology
2020 - Gut Microbial Dysbiosis in the Irritable Bowel Syndrome: A Systematic Review and Meta-Analysis of Case-Control Studies
Journal of the Academy of Nutrition and Dietetics
2019 - The impact of peppermint oil on the irritable bowel syndrome: a meta-analysis of the pooled clinical data
BMC Complementary and Alternative Medicine
2019
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Kris Kowdley, MD
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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. Reviewed account links and congress post links can appear separately. Absence of a section means “not yet looked,” never “none found.”