James Tumlin, MD
Enriched profileNephrologist, Director of Research, Georgia Nephrology; Professor of Medicine in Nephrology, Emory University School of Medicine; President, NephroNet Clinical Trials Consortium · Georgia Nephrology (Lawrenceville, GA); Adjunct/faculty appointment as Professor of Medicine
James Tumlin is Nephrologist, Director of Research, Georgia Nephrology; Professor of Medicine in Nephrology, Emory University School of Medicine; President, NephroNet Clinical Trials Consortium at Georgia Nephrology (Lawrenceville, GA); Adjunct/faculty appointment as Professor of Medicine. ClinicalTrials.gov lists 14 registered studies with this person as an investigator.
Data verified 17 Oct 2026
Overview
Updated 18 Oct 2026
James A. Tumlin, MD, is Nephrologist, Director of Research, Georgia Nephrology. It also documents an investigator role on 14 registered clinical trials, industry payments reported by 29 companies, 3 NIH-funded awards (1999–2023).
- Top research focus: Chronic Kidney Disease
- 14 registered trials on ClinicalTrials.gov
- Open Payments reporting from 29 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 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 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 18 Oct 2026
Listed as an investigator on 14 registered studies on ClinicalTrials.gov. The most recent:
- A Phase IIb, Multicenter, Open-Label, Prospective Study of Bremelanotide in Diabetic Kidney Disease
Sponsor: Palatin Technologies, Inc
Industry payments
Updated 18 Oct 2026
29 companies reported payments to CMS in program years 2021–2025. These are public disclosures, not judgments. The latest:
- Otsuka America Pharmaceutical, Inc.Program year202517 payments$35,304openpaymentsdata.cms.gov ↗
- Calliditas Therapeutics US Inc.Program year202512 payments
- Apellis Pharmaceuticals, Inc.Program year20255 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
59.2%Calcium channel blocker16.4%Diltiazem 24hr Er (Cd)40%Nifedipine Er32%Diltiazem Hcl29%Part D<11 patientsLoop diuretic16.4%Furosemide100%Part D≥18 patients+ 4 more classes in this area
Metabolism & gastrointestinal
16.1%SGLT2 inhibitor10.6%Farxiga100%Part D≥14 patientsVitamin D3 Analog5.5%Calcitriol100%Part D<11 patientsMusculoskeletal
12.5%Xanthine oxidase inhibitor12.5%Allopurinol100%Part D≥17 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 18 Oct 2026
3 NIH research awards on record, funded 1999–2023 per NIH RePORTER. The latest:
- Enhanced renal dialysis membrane performance using lipocalin modified substrates
Hibar Microsciences, Llc
FY2023$299,999R43DK134225
Publications
Matched to this physician's OpenAlex author record; most-cited works shown first.
- Sparsentan versus Irbesartan in Focal Segmental Glomerulosclerosis
New England Journal of Medicine
2023 - Randomized Phase II JANUS Study of Atacicept in Patients With IgA Nephropathy and Persistent Proteinuria
Kidney International Reports
2022 - Vadadustat in Patients with Anemia and Non–Dialysis-Dependent CKD
New England Journal of Medicine
2021 - Safety and Efficacy of Vadadustat for Anemia in Patients Undergoing Dialysis
New England Journal of Medicine
2021
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/james-tumlin-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 ↗ - LinkedIn
linkedin.com/in/james-tumlin-20589a146
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 ↗ - LinkedIn
linkedin.com/in/james-tumlin-b553a8257
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 ↗ - ResearchGate
researchgate.net/profile/James-Tumlin
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
med.emory.edu/directory/profile
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 →med.emory.edu ↗ - Other
nephronet.org/about
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 →nephronet.org ↗ - Other
hcplive.com/authors/james-tumlin-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 →hcplive.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 ↗
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- 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 →providers.emoryhealthcare.org ↗
- 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 →providers.emoryhealthcare.org ↗
- 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 →providers.emoryhealthcare.org ↗
- 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 →providers.emoryhealthcare.org ↗
- 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 →providers.emoryhealthcare.org ↗
Editorial & leadership roles
journal and society appointments- President
NephroNet Clinical Trials Consortium
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 →nephronet.org ↗ - Director of Research
Georgia Nephrology
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 →nephronet.org ↗ - Editorial review board member: CJASN
Kidney International, American Journal of Kidney Disease, American Journal of Physiology, Critical Care Medicine
provisionalFound in a cited public source but not yet independently corroborated. Published as a labeled candidate and queued for verification.How we verify →library.annanurse.org ↗
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 →ganephrology.com ↗
Secondary affiliations
appointments beyond the home institution- Hospital affiliations: Piedmont Eastside Medical Center
Northside Hospital Gwinnett, Northside Hospital Duluth, Emory Johns Creek Hospital
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 →ganephrology.com ↗ - Founder
NephroNet Clinical Trials Consortium (nonprofit bridging pharma industry, university research centers, and community investigators)
provisionalFound in a cited public source but not yet independently corroborated. Published as a labeled candidate and queued for verification.How we verify →library.annanurse.org ↗
Media & interviews
press, podcasts and appearances- provisionalFound in a cited public source but not yet independently corroborated. Published as a labeled candidate and queued for verification.How we verify →hcplive.com ↗
- provisionalFound in a cited public source but not yet independently corroborated. Published as a labeled candidate and queued for verification.How we verify →hcplive.com ↗
- Contributing author profile
HCPLive
provisionalFound in a cited public source but not yet independently corroborated. Published as a labeled candidate and queued for verification.How we verify →hcplive.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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