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Klaus Mergener, MD

Enriched profile

Global Chief Medical Officer and Head of Medical Scientific Affairs, PENTAX Medical (PENTAX Lifecare Division) · PENTAX Medical

ORCIDNone on fileNPI↗
✓ Full profile
Region🇺🇸 Edmonds, WA · West · United StatesSpecialtyGastroenterologyFocusGastroenterology
Active KOLLatest publicationNone indexedOnline presenceverified 2026Payments2021–2025NIH fundingNone on fileWhy? →

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 17 Oct 2026

Overview

Updated 18 Oct 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 18 Oct 2026. Every fact links its source below.

Indications focus

from trials led + research topics
Gastroesophageal Reflux1 trial

Research focus

OpenAlex concept fingerprint
Gastroenterology

Drugs & molecules

across trials, industry payments and publications
Eohiliageneric · BudesonideClinical trials—Industry payments1Publications—Voqueznageneric · VonoprazanClinical trials—Industry payments1Publications—Vowstgeneric · Fecal microbiota spores, liveClinical trials—Industry payments1Publications—XIFAXANgeneric · RifaximinClinical trials—Industry payments1Publications—Zenpepgeneric · Amylase / lipase / proteaseClinical trials—Industry payments1Publications—

Works with

trial sponsors and companies reporting payments
PENTAX of America, Inc.Clinical trials—Industry payments24Cook Medical LLCClinical trials—Industry payments13Boston Scientific CorporationClinical trials—Industry payments12GE HealthCareClinical trials—Industry payments5Aimmune Therapeutics, Inc.Clinical trials—Industry payments2GI View Ltd.Clinical trials1Industry payments—NDO Surgical, Inc.Clinical trials1Industry payments—Phathom Pharmaceuticals, Inc.Clinical trials—Industry payments1Salix Pharmaceuticals, a division of Bausch Health US, LLCClinical trials—Industry payments1Sebela Pharmaceuticals Inc.Clinical trials—Industry payments1Takeda Pharmaceuticals U.S.A., Inc.Clinical trials—Industry payments1

Scholarship

indexed output and impact (OpenAlex)
View publications ↓
32h-index

Hirsch index, productivity × impact (OpenAlex).

Clinical & industry

trials, payments and federal funding
2clinical trials

Investigator role on registered studies.

View trials ↓
10companies · 2021–2025

Companies reporting payments to CMS. Facts, not judgments.

View payments ↓
0NIH grants

Federally 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.

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Clinical trials

Updated 18 Oct 2026

Listed as an investigator on 2 registered studies on ClinicalTrials.gov. The most recent:

Industry payments

Updated 18 Oct 2026

10 companies reported payments to CMS in program years 2021–2025. These are public disclosures, not judgments. The latest:

All 17 payment records: search, sort and filter.Explore →
View the CMS Open Payments record ↗

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 patients
    Proton pump inhibitor15.9%
    Omeprazole100%
    Part D<11 patients

  • Blood & clotting

    13.1%
    Solutions for parenteral nutrition13.1%
    Peg 3350-Electrolyte100%
    Part D≥14 patients
Where care is delivered (Part B)80.7% facility · 19.3% office

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

None on file yet. We only list publications we can confidently match to this person. Why? →

Online presence

Updated 18 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/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

    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 →x.com ↗
  • 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 18 Oct 2026

Credentials, appointments and honors, newest first, each linked to the public source it came from.

Education

degrees and training on record
  • PhD in molecular virology

    German Cancer Research Center, Ruprecht-Karls-University Heidelberg

    2008
    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 ↗
  • Board Certified in Gastroenterology
    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

    2022
    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 ↗
  • Past President

    American Society for Gastrointestinal Endoscopy (ASGE), 2020-2021

    2021
    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 ↗
  • Vice Chair

    ASGE Foundation Board of Trustees, 2014-2018

    2018
    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 ↗
  • Affiliate Professor of Medicine

    Division of Gastroenterology, University of Washington 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 →asge.org ↗
  • Gastroenterologist

    Gastro Health (Edmonds, 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 →gastrohealth.com ↗
  • Associate Editor (COVID-19 coverage)

    ASGE Journal Scan

    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 ↗
  • Past Washington State Governor

    American College of Gastroenterology (ACG)

    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 ↗
  • Former board member

    Pacific Northwest Gastroenterology Society

    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 ↗
  • Member

    European Society of Gastrointestinal Endoscopy; active member, World Endoscopy Organization

    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 ↗

Awards & honors

honors on the public record

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

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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