Geoffrey Block, MD
Enriched profileAssociate Chief Medical Officer & Senior Vice President, Clinical Research & Medical Affairs · U.S. Renal Care
Geoffrey Block is Associate Chief Medical Officer & Senior Vice President, Clinical Research & Medical Affairs at U.S. Renal Care. OpenAlex indexes 287 publications with 23,163 citations (h-index 62); ClinicalTrials.gov lists 13 registered studies with this person as an investigator. By OpenAlex citation count, this profile ranks in the top 5% of Nephrology profiles in the findmyKOL directory.
Data verified 14 Aug 2026
Overview
Updated 15 Oct 2026
Geoffrey A. Block, MD, is Associate Chief Medical Officer & Senior Vice President, Clinical Research & Medical Affairs at U.S. Renal Care. The public record shows 287 publications with 23,163 citations (h-index 62), centered on Parathyroid Disorders and Treatments, Dialysis and Renal Disease Management, Magnesium in Health and Disease. It also documents an investigator role on 13 registered clinical trials, industry payments reported by 10 companies.
- Most recent indexed publication: 2026 · Kidney360
- Top research focus: Parathyroid Disorders and Treatments
- 13 registered trials on ClinicalTrials.gov
- Open Payments reporting from 10 companies
Generated from the cited public record · current as of 15 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; 8 in PubMed.
Total citations across indexed works.
Hirsch index (OpenAlex). i10-index 137.
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 15 Oct 2026
Listed as an investigator on 13 registered studies on ClinicalTrials.gov. The most recent:
- Ferric Citrate for the Transition From CKD Stage 4/5 to CKD Stage 5D
Sponsor: Denver Nephrologists, P.C.
- KRX-0502 (Ferric Citrate) for the Treatment of IDA in Adult Subjects With NDD-CKD
Sponsor: Keryx Biopharmaceuticals
Industry payments
Updated 15 Oct 2026
10 companies reported payments to CMS in program years 2021–2025. These are public disclosures, not judgments. The latest:
- Outset Medical IncProgram year20251 payment$15,000openpaymentsdata.cms.gov ↗
- AKEBIA THERAPEUTICS INCProgram year20254 payments
- Shionogi IncProgram year20251 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.
Nervous system
50%Gabapentinoids50%Gabapentin100%Part D<11 patientsCardiovascular
50%Angiotensin receptor blocker (ARB)50%Losartan Potassium100%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
We didn't find any NIH-funded research awards for this person in NIH RePORTER. Why? →
Congress activity
Updated 15 Oct 2026
2 congress contributions (2014–2018) across ASCO, ASH per OpenAlex. The most recent:
- The evaluation of denosumab safety in patients with chronic kidney disease: An open-label study.
ASCO Annual Meeting
ASCO2014Presenting authorOnline-only
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 15 Oct 2026
Their five most recent publications, matched to their ORCID record and linked to PubMed.
- A Phase 2 Clinical Trial of Oxylanthanum Carbonate in Patients Receiving Maintenance Hemodialysis with Hyperphosphatemia.
Clinical journal of the American Society of Nephrology
Article2025
Most-cited works
by citation count (OpenAlex)Network
Updated 15 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 15 Oct 2026
This person's own public accounts first, then places where others mention them. Two different things, listed separately.
Mentions by others
where others cite or feature them- X / Twitter
ir.ardelyx.com/news-releases/news-release-details/ardelyx-appoints-renowned-nephrologist-geoffrey-block-md-its
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 →ir.ardelyx.com ↗ - Other
usrenalcare.com/bio/geoffrey-a-block
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 →usrenalcare.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 15 Oct 2026
Credentials, appointments and honors, newest first, each linked to the public source it came from.
Education
degrees and training on record- BA
Zoology, Miami University (Oxford, OH)
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 →rockymountainkidney.com ↗ - MD
University of Cincinnati College 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 →usrenalcare.com ↗ - Internal Medicine Residency and Chief Residency
University of Cincinnati
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 →usrenalcare.com ↗ - Nephrology Fellowship
University of Michigan (Ann Arbor)
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 →usrenalcare.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 ↗
Editorial & leadership roles
journal and society appointments- 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 ↗
- Manuscript reviewer (since 2000) for New England Journal of Medicine
Journal of the American Medical Association, Journal of the American Society of Nephrology, and American Journal of Kidney Disease
2000verifiedCorroborated 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 →usrenalcare.com ↗ - Member
Scientific Advisory Board, R1 Therapeutics (supporting AP306 development for chronic kidney disease)
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 →globenewswire.com ↗
Awards & honors
honors on the public record- 2026 American Association of Kidney Patients (AAKP) Medal of Excellence
awarded for lifetime contributions to kidney care
2026verifiedCorroborated 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 ↗
Secondary affiliations
appointments beyond the home institution- Rocky Mountain Kidney Care (Lone Tree, CO)
clinical practice affiliation
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 →rockymountainkidney.com ↗ - Former Vice President
Nephrology, Reata Pharmaceuticals
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 ↗ - Former Director of Clinical Research
Denver Nephrology Research Division (Colorado Kidney Care)
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 ↗ - Former Associate Clinical Professor of Medicine
University of Colorado Health Sciences Center
provisionalFound in a cited public source but not yet independently corroborated. Published as a labeled candidate and queued for verification.How we verify →prnewswire.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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