Geoffrey Barnes, MD
Enriched profileAssociate Professor of Internal Medicine (Cardiovascular and Vascular Medicine) · University of Michigan Medical School
Geoffrey Barnes is Associate Professor of Internal Medicine (Cardiovascular and Vascular Medicine) at University of Michigan Medical School. OpenAlex indexes 420 publications with 9,361 citations (h-index 38); ClinicalTrials.gov lists 2 registered studies with this person as an investigator.
Data verified 14 Aug 2026
Overview
Updated 27 Aug 2026
Geoffrey Barnes, MD, is Associate Professor of Internal Medicine (Cardiovascular and Vascular Medicine) at University of Michigan Medical School / Frankel Cardiovascular Center (Michigan Medicine), Ann Arbor, MI. The public record shows 420 publications with 9,361 citations (h-index 38), centered on Atrial Fibrillation Management and Outcomes, Venous Thromboembolism Diagnosis and Management, Antiplatelet Therapy and Cardiovascular Diseases. It also documents an investigator role on 2 registered clinical trials, industry payments reported by 15 companies, 7 NIH-funded awards (2017–2026).
- Most recent indexed publication: 2026 · Vascular medicine (London, England)
- Top research focus: Atrial Fibrillation Management and Outcomes
- 2 registered trials on ClinicalTrials.gov
- Open Payments reporting from 15 companies
Generated from the cited public record · current as of 27 Aug 2026. Every fact links its source below.
Indications focus
from trials led + research topicsResearch focus
OpenAlex concept fingerprintDrugs & molecules
across trials, industry payments and publicationsWorks with
trial sponsors and companies reporting paymentsScholarship
indexed output and impact (OpenAlex)Distinct works indexed by OpenAlex, matched via ORCID; 75 in PubMed.
Total citations across indexed works.
Hirsch index (OpenAlex). i10-index 123.
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
Updated 27 Aug 2026
Listed as an investigator on 2 registered studies on ClinicalTrials.gov. The most recent:
- Vitamin K for Perioperative Warfarin Management
Sponsor: University of Michigan
- Implementing Prescriber-Pharmacist Collaborative Care for Evidence-based Anticoagulant Use
Sponsor: University of Michigan
Industry payments
Updated 27 Aug 2026
15 companies reported payments to CMS in program years 2021–2025. These are public disclosures, not judgments. The latest:
- Bayer Healthcare Pharmaceuticals Inc.Program year202510 payments$13,149openpaymentsdata.cms.gov ↗
- PFIZER INC.Program year20253 payments
- E.R. Squibb & Sons, L.L.C.Program year20253 payments
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.
Cardiovascular
65.4%Statin25.3%Atorvastatin Calcium82%Rosuvastatin Calcium18%Part D<11 patientsAldosterone antagonist (MRA)10.1%Spironolactone100%Part D<11 patientsBlood & clotting
28.7%Factor Xa inhibitor28.7%Eliquis68%Xarelto32%Part D<11 patientsMetabolism & gastrointestinal
5.9%SGLT2 inhibitor5.9%Jardiance100%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.
NIH funding
Updated 27 Aug 2026
7 NIH research awards on record, funded 2017–2026 per NIH RePORTER. The latest:
- Michigan Emergency Department Improvement Collaborative AltERnaTives to admission for Pulmonary Embolism (MEDIC ALERT PE) Study
University of Michigan at Ann Arbor
FY2026$774,549R01HL163438 - Michigan Emergency Department Improvement Collaborative AltERnaTives to admission for Pulmonary Embolism (MEDIC ALERT PE) Study
University of Michigan at Ann Arbor
FY2025$774,699R01HL163438 - Developing Implementation Science Expertise in Cardiovascular Health Services Research
University of Michigan at Ann Arbor
FY2025$133,085K24HL179410
Congress activity
Updated 27 Aug 2026
8 congress contributions (2019–2025) across ASH per OpenAlex. The most recent:
- Improving Guideline Concordant Primary Prevention Aspirin Use through a Multiclinic Antithrombotic Stewardship Intervention
ASH Annual Meeting
ASH2024Co-author - Treatment Versus Prophylactic Apixaban or Rivaroxaban for Extended Venous Thromboembolic Disease Management
ASH Annual Meeting
ASH2024Co-author
Published abstracts are attributed via the same ORCID-disambiguated authorship as publications, so each is DOI-verified. Podium roles (invited talks, session chairs) and oral/poster type are added as program data is confirmed.
Publications
Updated 27 Aug 2026
Their five most recent publications, matched to their ORCID record and linked to PubMed.
- Introducing the 2026 Focused Issue on Venous Disease: What excites us most about the future of this field.
Vascular medicine (London, England)
Editorial2026 - Anticoagulation Services as a Model for Cardiovascular Medication Stewardship.
Circulation
Article2026
Most-cited works
by citation count (OpenAlex)- 01
- 02National Trends in Ambulatory Oral Anticoagulant Use600 citations2015
- 04
- 05
Network
Updated 27 Aug 2026
The people this person publishes with most, by number of co-authored papers. Names link to their own profile when we have one.
Online presence
Updated 27 Aug 2026
This person's own public accounts first, then places where others mention them. Two different things, listed separately.
Owned accounts
public accounts run by this person- Doximity
doximity.com/pub/geoffrey-barnes-md
verifiedCorroborated by findmyKOL. We matched this record across two or more independent public sources (or a verified ORCID / NPI identifier bridge) before attributing it to this person.How we verify →doximity.com ↗ - ResearchGate
researchgate.net/profile/Geoffrey-Barnes
verifiedCorroborated by findmyKOL. We matched this record across two or more independent public sources (or a verified ORCID / NPI identifier bridge) before attributing it to this person.How we verify →researchgate.net ↗ - X / Twitter
x.com/GBarnesMD
Mentions by others
where others cite or feature them- LinkedIn
linkedin.com/posts/university-of-michigan_geoffrey-barnes-cardiologist-and-vascular-activity-7298339671326015489-RUUf
verifiedCorroborated by findmyKOL. We matched this record across two or more independent public sources (or a verified ORCID / NPI identifier bridge) before attributing it to this person.How we verify →linkedin.com ↗ - Apple Podcasts
podcasts.apple.com/us/podcast/geoffrey-barnes-md-msc-primary-care-call-to-action/id795174215
provisionalFound in a cited public source but not yet independently corroborated. Published as a labeled candidate and queued for verification.How we verify →podcasts.apple.com ↗ - YouTube
youtube.com/watch
verifiedCorroborated by findmyKOL. We matched this record across two or more independent public sources (or a verified ORCID / NPI identifier bridge) before attributing it to this person.How we verify →youtube.com ↗
We list an account only when the public record ties it to this person. verified means we've confirmed the match in more than one place; provisional means it looks right but we're still confirming.
Background & recognition
Updated 27 Aug 2026
Credentials, appointments and honors, newest first, each linked to the public source it came from.
Education
degrees and training on record- verifiedCorroborated by findmyKOL. We matched this record across two or more independent public sources (or a verified ORCID / NPI identifier bridge) before attributing it to this person.How we verify →medschool.umich.edu ↗
- verifiedCorroborated by findmyKOL. We matched this record across two or more independent public sources (or a verified ORCID / NPI identifier bridge) before attributing it to this person.How we verify →medschool.umich.edu ↗
- MSc
Health and Healthcare Research, University of Michigan
provisionalFound in a cited public source but not yet independently corroborated. Published as a labeled candidate and queued for verification.How we verify →cardiometabolichealth.org ↗ - Board-certified
Cardiovascular Disease and Vascular Medicine
provisionalFound in a cited public source but not yet independently corroborated. Published as a labeled candidate and queued for verification.How we verify →doximity.com ↗
Editorial & leadership roles
journal and society appointments- Co-Director
Michigan Anticoagulation Quality Improvement Initiative (MAQI2)
verifiedCorroborated by findmyKOL. We matched this record across two or more independent public sources (or a verified ORCID / NPI identifier bridge) before attributing it to this person.How we verify →cardiometabolichealth.org ↗ - Medical Director
University of Michigan Pulmonary Embolism Response Team (PERT)
verifiedCorroborated by findmyKOL. We matched this record across two or more independent public sources (or a verified ORCID / NPI identifier bridge) before attributing it to this person.How we verify →medschool.umich.edu ↗ - Director
Vascular Medicine Fellowship Program, University of Michigan
verifiedCorroborated by findmyKOL. We matched this record across two or more independent public sources (or a verified ORCID / NPI identifier bridge) before attributing it to this person.How we verify →medschool.umich.edu ↗
Awards & honors
honors on the public record- provisionalFound in a cited public source but not yet independently corroborated. Published as a labeled candidate and queued for verification.How we verify →ahajournals.org ↗
- provisionalFound in a cited public source but not yet independently corroborated. Published as a labeled candidate and queued for verification.How we verify →ahajournals.org ↗
Secondary affiliations
appointments beyond the home institution- Member
Institute for Healthcare Policy and Innovation (IHPI), University of Michigan
verifiedCorroborated by findmyKOL. We matched this record across two or more independent public sources (or a verified ORCID / NPI identifier bridge) before attributing it to this person.How we verify →ihpi.umich.edu ↗
Media & interviews
press, podcasts and appearances- verifiedCorroborated by findmyKOL. We matched this record across two or more independent public sources (or a verified ORCID / NPI identifier bridge) before attributing it to this person.How we verify →citoday.com ↗
- verifiedCorroborated by findmyKOL. We matched this record across two or more independent public sources (or a verified ORCID / NPI identifier bridge) before attributing it to this person.How we verify →evtoday.com ↗
- verifiedCorroborated by findmyKOL. We matched this record across two or more independent public sources (or a verified ORCID / NPI identifier bridge) before attributing it to this person.How we verify →medscapelive-newsletter.com ↗
Every item links to where we found it. verified means we've confirmed it in more than one place; provisional means we found it and are still confirming.
Similar KOLs
Other experts from the same institution or the same specialty.
Bertram Pitt, MD
University of Michigan Medical School
Anna Lok, MD
University of Michigan Medical School
Roger Albin, MD
University of Michigan Medical School
Meilan Han, MD
University of Michigan Medical School