Klaus Mergener, MD
Enriched profileGlobal Chief Medical Officer and Head of Medical Scientific Affairs, PENTAX Medical (PENTAX Lifecare Division) · PENTAX Medical
Klaus Mergener is Global Chief Medical Officer and Head of Medical Scientific Affairs, PENTAX Medical (PENTAX Lifecare Division) at PENTAX Medical. ClinicalTrials.gov lists 2 registered studies with this person as an investigator.
Data verified 14 Aug 2026
Overview
Updated 27 Aug 2026
Klaus D. Mergener, MD, is Global Chief Medical Officer and Head of Medical Scientific Affairs, PENTAX Medical (PENTAX Lifecare Division). The public record shows 147 publications with 6,445 citations (h-index 32), centered on Gastroenterology. It also documents an investigator role on 2 registered clinical trials, industry payments reported by 10 companies.
- Top research focus: Gastroenterology
- 2 registered trials on ClinicalTrials.gov
- Open Payments reporting from 10 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)Hirsch index, productivity × impact (OpenAlex).
Clinical & industry
trials, payments and federal fundingFederally funded research awards.
Contact
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:
- Post Market Evaluation of Aer-O-Scope Visualization
Sponsor: GI View Ltd.
- A Study to Determine the Effectiveness of Endoscopic Full-Thickness Plication for the Treatment of GERD
Sponsor: NDO Surgical, Inc.
Industry payments
Updated 27 Aug 2026
10 companies reported payments to CMS in program years 2021–2025. These are public disclosures, not judgments. The latest:
- Cook Medical LLCProgram year20254 payments
- Aimmune Therapeutics, Inc.Program year20252 payments
- Takeda Pharmaceuticals U.S.A., Inc.Program year20251 payment
Medicare prescribing footprint (2020)
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
86.9%Osmotic Laxative71%Gavilyte-C100%Part D≥74 patientsProton pump inhibitor15.9%Omeprazole100%Part D<11 patientsBlood & clotting
13.1%Solutions for parenteral nutrition13.1%Peg 3350-Electrolyte100%Part D≥14 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
We didn't find any NIH-funded research awards for this person in NIH RePORTER. Why? →
Publications
Matched to this physician's OpenAlex author record; most-cited works shown first.
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/klaus-mergener-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/kmergener
- LinkedIn
linkedin.com/in/mergener
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 ↗
Mentions by others
where others cite or feature them- Other
asge.org/home/education-meetings/bio/klaus-mergener
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 →asge.org ↗ - Other
beckersasc.com/gastroenterology-and-endoscopy/gi-physician-leader-to-know-dr-klaus-mergener-of-digestive-health-specialists
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 →beckersasc.com ↗ - Apple Podcasts
podcasts.apple.com/tw/podcast/best-laid-plans-with-klaus-mergener-md-phd-mba/id1533085169
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 →podcasts.apple.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 →asge.org ↗
- MD
Frankfurt and Heidelberg, Germany; residency in Internal Medicine and fellowship in Gastroenterology/Interventional Endoscopy at Duke University Medical Center; additional training at Harvard University
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 →prnewswire.com ↗ - MBA
University of Massachusetts at Amherst
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 →prnewswire.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 →gastrohealth.com ↗
Editorial & leadership roles
journal and society appointments- Global Chief Medical Officer and Head of Medical Scientific Affairs
PENTAX Medical (PENTAX Lifecare Division), since April 1
2022verifiedCorroborated 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 →prnewswire.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 →healio.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 →prnewswire.com ↗
Awards & honors
honors on the public record- PhD thesis completed summa cum laude under 2008 Nobel Laureate Harald zur Hausen
German Cancer Research Center, Heidelberg
2008verifiedCorroborated 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 →prnewswire.com ↗ - Distinguished Educator Award
American Society for Gastrointestinal Endoscopy (ASGE)
provisionalFound in a cited public source but not yet independently corroborated. Published as a labeled candidate and queued for verification.How we verify →gastrohealth.com ↗ - Master of ASGE (MASGE)
Master designation from ASGE
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 →asge.org ↗
Secondary affiliations
appointments beyond the home institution- Affiliate Professor of Medicine
University of Washington School of Medicine, Seattle, WA
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 →prnewswire.com ↗ - Gastro Health
Edmonds, WA (clinical practice)
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 →gastrohealth.com ↗ - Partner
Digestive Health Specialists, Tacoma, WA; Clinical Medical Director of Gastroenterology, MultiCare Health System, Tacoma (earlier/possibly legacy listing predating or concurrent with Gastro Health affiliation)
provisionalFound in a cited public source but not yet independently corroborated. Published as a labeled candidate and queued for verification.How we verify →beckersasc.com ↗
Media & interviews
press, podcasts and appearances- "Best Laid Plans with Klaus Mergener, MD, PhD, MBA"
Pacific Northwest Gastroenterology Society (pnwgshighfiber's podcast) year-in-review episode
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 →podcasts.apple.com ↗ - Guest
ENDO Podcast (Endoscopy Campus, hosted by Thomas Rösch), episode on endoscopy in the United States
provisionalFound in a cited public source but not yet independently corroborated. Published as a labeled candidate and queued for verification.How we verify →endoscopy-campus.com ↗ - Guest
ENDO Podcast episode on Rudolf Schindler, inventor of gastroscopy and ASGE founder
provisionalFound in a cited public source but not yet independently corroborated. Published as a labeled candidate and queued for verification.How we verify →endoscopy-campus.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.
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