Gregory Marcus, MD
Enriched profileProfessor of Medicine (Professor-in-Residence); Endowed Professor of Atrial Fibrillation Research I; Associate Chief of Cardiology for Research · University of California, San Francisco (UCSF)
Gregory Marcus is Professor of Medicine (Professor-in-Residence); Endowed Professor of Atrial Fibrillation Research I; Associate Chief of Cardiology for Research at University of California, San Francisco (UCSF). OpenAlex indexes 1,024 publications with 82,961 citations (h-index 107); ClinicalTrials.gov lists 16 registered studies with this person as an investigator. By OpenAlex citation count, this profile ranks in the top 1% of Clinical Cardiac Electrophysiology profiles in the findmyKOL directory.
Data verified 7 Sept 2026
Overview
Updated 13 Oct 2026
Gregory M. Marcus, MD, is Professor of Medicine (Professor-in-Residence) at University of California, San Francisco (UCSF), Division of Cardiology, Department of Medicine. The public record shows 1,024 publications with 82,961 citations (h-index 107), centered on Cardiac Arrhythmias and Treatments, Atrial Fibrillation Management and Outcomes, Cardiac electrophysiology and arrhythmias. It also documents an investigator role on 16 registered clinical trials, industry payments reported by 4 companies, 4 NIH-funded awards (2014–2026).
- Most recent indexed publication: 2026 · Research square
- Top research focus: Cardiac Arrhythmias and Treatments
- 16 registered trials on ClinicalTrials.gov
- Open Payments reporting from 4 companies
Generated from the cited public record · current as of 13 Oct 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; 62 in PubMed.
Total citations across indexed works.
Hirsch index (OpenAlex). i10-index 512.
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 13 Oct 2026
Listed as an investigator on 16 registered studies on ClinicalTrials.gov. The most recent:
- Out-of-office Monitoring for Rhythms Of Normal Versus Atrial Fibrillation
Sponsor: University of California, San Francisco
- Disrupted Sleep and Concurrent Ectopy or Atrial Fibrillation
Sponsor: University of California, San Francisco
- Gauging Outcomes of Total Milk Ingestion on Lipid and gControl
Sponsor: University of California, San Francisco
Industry payments
Updated 13 Oct 2026
4 companies reported payments to CMS in program years 2021–2025. These are public disclosures, not judgments. The latest:
- Medtronic, Inc.Program year20251 payment
- Medtronic, Inc.Program year20241 payment
- Abbott LaboratoriesProgram year20241 payment
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
68.8%Antiarrhythmic30.6%Flecainide Acetate46%Amiodarone Hcl27%Dofetilide27%Part D<11 patientsBeta blocker28.5%Metoprolol Succinate100%Part D≥14 patients+ 1 more class in this area
Blood & clotting
31.2%Factor Xa inhibitor31.2%Eliquis100%Part D≥15 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 13 Oct 2026
4 NIH research awards on record, funded 2014–2026 per NIH RePORTER. The latest:
- Digital Interventions to Study and Influence the Alcohol-Atrial Fibrillation Connection
University of California, San Francisco
FY2026$477,562R01AA022222 - Applying Digital Health to the AF Ablation NCDR, Enabling Longitudinal Follow-up
University of California, San Francisco
FY2025$710,084R01HL158825 - Digital Interventions to Study and Influence the Alcohol-Atrial Fibrillation Connection
University of California, San Francisco
FY2025$477,431R01AA022222
Publications
Updated 13 Oct 2026
Their five most recent publications, matched to their ORCID record and linked to PubMed.
- Leveraging Self-Reporting in an Existing e-Cohort to Identify Clinically Relevant Mitral Valve Prolapse: Pilot Questionnaire Study.
JMIR formative research
Article2026 - Digital Health Intervention to Promote Lifelong Specialized Care in Adults With Congenital Heart Disease: Theory-Driven Community Co-Designed Study.
Journal of medical Internet research
Article2026 - Exploring Phosphatidylethanol Cutoffs for Self-Reported Unhealthy Alcohol Use: An International Multi-Site Analysis.
Alcohol, clinical & experimental research
Article2026 - Rare coding variant architecture and gene discovery from 130,000 sequenced cases of atrial fibrillation.
Research square
Article2026
Most-cited works
by citation count (OpenAlex)- 01Heart Disease and Stroke Statistics—2012 Update7,234 citations2011
- 02Heart Disease and Stroke Statistics—2011 Update6,170 citations2010
- 03Heart Disease and Stroke Statistics—2014 Update5,230 citations2013
- 04Heart Disease and Stroke Statistics—2013 Update5,188 citations2012
- 05
Network
Updated 13 Oct 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 13 Oct 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/gregory-marcus-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 ↗ - X / Twitter
x.com/gregorymmarcus
- ResearchGate
researchgate.net/profile/Gregory-Marcus
provisionalFound in a cited public source but not yet independently corroborated. Published as a labeled candidate and queued for verification.How we verify →researchgate.net ↗
Mentions by others
where others cite or feature them- Other
coffeepeoplepodcast.com/dr-gregory-marcus-associate-chief-of-cardiology-for-research-at-ucsf-health
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 →coffeepeoplepodcast.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 ↗ - 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 ↗ - X / Twitter
X/Twitter: @gregorymmarcus
provisionalFound in a cited public source but not yet independently corroborated. Published as a labeled candidate and queued for verification.How we verify →x.com ↗ - LinkedIn
LinkedIn: Associate Editor, JAMA, Gregory Marcus
provisionalFound in a cited public source but not yet independently corroborated. Published as a labeled candidate and queued for verification.How we verify →linkedin.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 13 Oct 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 →profiles.ucsf.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 →profiles.ucsf.edu ↗
- Board Certified
Clinical Cardiac Electrophysiology, American Board of Internal Medicine
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 →ucsfhealth.org ↗ - Internal Medicine residency and Chief Medical Resident
Stanford University Medical Center
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 →ucsfhealth.org ↗ - Cardiovascular Disease and Cardiac Electrophysiology fellowships
UCSF School of Medicine
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 →ucsfhealth.org ↗
Editorial & leadership roles
journal and society appointments- Associate Editor
JAMA
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 →profiles.ucsf.edu ↗ - Chair-Elect
American Heart Association Committee on Drugs, Alcohol, and Tobacco
provisionalFound in a cited public source but not yet independently corroborated. Published as a labeled candidate and queued for verification.How we verify →google.com ↗ - Writing committee member
AHA/ACC/HRS Management of Atrial Fibrillation guidelines
provisionalFound in a cited public source but not yet independently corroborated. Published as a labeled candidate and queued for verification.How we verify →google.com ↗ - Leader
Health eHeart Study and NIH-funded Eureka research platform
provisionalFound in a cited public source but not yet independently corroborated. Published as a labeled candidate and queued for verification.How we verify →ucsfhealthcardiology.ucsf.edu ↗ - Principal Investigator
atrial fibrillation clinical trials at UCSF Medical Center at Parnassus
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 →clinicaltrials.gov ↗
Awards & honors
honors on the public 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 →profiles.ucsf.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 →profiles.ucsf.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 →profiles.ucsf.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 →profiles.ucsf.edu ↗
Secondary affiliations
appointments beyond the home institution- UCSF Health
Associate Chief of Cardiology for Research
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 →ucsfhealthcardiology.ucsf.edu ↗ - UCSF Center for Tobacco Control Research and Education
faculty member
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 →tobacco.ucsf.edu ↗ - Get in Rhythm
Stay in Rhythm (UCSF patient/CME education initiative), faculty
provisionalFound in a cited public source but not yet independently corroborated. Published as a labeled candidate and queued for verification.How we verify →getinrhythm.com ↗
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 →ucsf.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 →ucsf.edu ↗
- Guest
Coffee People podcast, discussion of DECAF/CRAVE trials on coffee and cardiac arrhythmia
provisionalFound in a cited public source but not yet independently corroborated. Published as a labeled candidate and queued for verification.How we verify →coffeepeoplepodcast.com ↗ - provisionalFound in a cited public source but not yet independently corroborated. Published as a labeled candidate and queued for verification.How we verify →ucsfhealth.org ↗
- Speaker
"Lifestyle and Atrial Fibrillation: Adventures in Clinical Research with Greg Marcus", UCSF Department of Medicine event
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 →medicine.ucsf.edu ↗
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.
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