John Birk is a Gastroenterology physician affiliated with UConn Health. OpenAlex indexes 176 publications with 1,469 citations (h-index 16); ClinicalTrials.gov lists 1 registered study 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
263 Farmington Ave
Gastroenterology Associates
Farmington, CT 060300001
Telephone
860-679-3238Registry record last updated 28 Sept 2022.
Clinical trials
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
7 companies reported payments to CMS in program years 2021 onward. These are public disclosures, not judgments. The latest:
- Vibrant Gastro, Inc.Program year20241 payment
- Gilead Sciences, Inc.Program year20241 payment
- ERBE USA IncProgram 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
92.3%Proton pump inhibitor43.1%Pantoprazole Sodium67%Esomeprazole Magnesium22%Lansoprazole11%Part D<11 patientsAntidiarrheal microorganisms26.8%Creon79%Zenpep21%Part D<11 patients+ 3 more classes in this area
Nervous system
7.7%Azaspirodecanedione derivatives7.7%Buspirone 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.
- Systemic Inflammation and the Inflammatory Context of the Colonic Microenvironment Are Improved by Urolithin A
Cancer Prevention Research
2025 - Differentiating Neonatal Dubin Johnson Syndrome from Biliary Atresia: Start Simply
Journal of Clinical and Translational Hepatology
2023
Similar KOLs
Other experts from the same institution or the same specialty.
Martha Radford, MD
UConn Health
David Steffens, MD
UConn Health
Peter Albertsen, MD
UConn Health
Mark Metersky, MD
UConn Health
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.”