Sagar Nigwekar, MD
Enriched profileAssistant in Medicine (Nephrology), Massachusetts General Hospital; Assistant Professor of Medicine, Harvard Medical School · Massachusetts General Hospital
Sagar Nigwekar is Assistant in Medicine (Nephrology), Massachusetts General Hospital; Assistant Professor of Medicine, Harvard Medical School at Massachusetts General Hospital. OpenAlex indexes 229 publications with 7,554 citations (h-index 43); ClinicalTrials.gov lists 3 registered studies with this person as an investigator.
Data verified 14 Aug 2026
Overview
Updated 1 Sept 2026
Sagar Nigwekar, MD, is Assistant in Medicine (Nephrology), Massachusetts General Hospital. The public record shows 229 publications with 7,554 citations (h-index 43), centered on ESRD / Dialysis. It also documents an investigator role on 3 registered clinical trials, industry payments reported by 12 companies, 2 NIH-funded awards (2019–2025).
- Most recent indexed publication: 2026 · Journal of the American Society of Nephrology
- Top research focus: ESRD / Dialysis
- 3 registered trials on ClinicalTrials.gov
- Open Payments reporting from 12 companies
Generated from the cited public record · current as of 1 Sept 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; 13 in PubMed.
Total citations across indexed works.
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 1 Sept 2026
Listed as an investigator on 3 registered studies on ClinicalTrials.gov. The most recent:
- Partners Calciphylaxis Biobank
Sponsor: Massachusetts General Hospital
- Helping Olfaction and Nutrition On Renal Replacement
Sponsor: Massachusetts General Hospital
- Evaluation of Vitamin K Supplementation for Calcific Uremic Arteriolopathy
Sponsor: Massachusetts General Hospital
Industry payments
Updated 1 Sept 2026
12 companies reported payments to CMS in program years 2021–2025. These are public disclosures, not judgments. The latest:
- Fresenius USA Marketing, Inc.Program year20254 payments
- Kyowa Kirin Co., LtdProgram year20251 payment
- Alexion Pharmaceuticals, Inc.Program year20252 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.
Metabolism & gastrointestinal
44.9%Vitamin D3 Analog26.5%Calcitriol100%Part D≥14 patientsSGLT2 inhibitor10.3%Farxiga100%Part D<11 patientsCardiovascular
31.9%Calcium channel blocker14.1%Amlodipine Besylate50%Diltiazem 24hr Er (Cd)50%Part D<11 patientsLoop diuretic11.4%Furosemide100%Part D<11 patientsOther
23.2%Drugs for treatment of hyperkalemia and hyperphosphatemia14.1%Velphoro54%Lokelma46%Part D<11 patientsPhosphate Binder9.2%Sevelamer Carbonate100%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
Updated 1 Sept 2026
2 NIH research awards on record, funded 2019–2025 per NIH RePORTER. The latest:
- NMR-Based Rapid Fluid Assessment: Device Design and Signal Processing
Massachusetts Institute of Technology
FY2025$540,178R01EB031813 - NMR-Based Rapid Fluid Assessment: Device Design and Signal Processing
Massachusetts Institute of Technology
FY2024$530,132R01EB031813 - NMR-Based Rapid Fluid Assessment: Device Design and Signal Processing
Massachusetts Institute of Technology
FY2023$540,951R01EB031813
Publications
Updated 1 Sept 2026
Their five most recent publications, matched to their ORCID record and linked to PubMed.
- High Phosphate and Low Protein Mediate Arterial and Cutaneous Vascular Calcification in CKD Mice.
Journal of the American Society of Nephrology
Article2026 - Approach to Quality Control Used for the HOPE Consortium Trial to Reduce Pain and Opioid Use in Hemodialysis.
Clinical journal of the American Society of Nephrology
Article2025 - Focal Adhesion Kinase Promotes Calcification of Vascular Smooth Muscle Cells via Regulation of Histone Deacetylase 4 and 5.
Arteriosclerosis, thrombosis, and vascular biology
Article2025 - Activation and targetability of TYMP-IL-6-TF signaling in the skin microenvironment in uremic calciphylaxis.
Science translational medicine
Article2025
Online presence
Updated 1 Sept 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- LinkedIn
linkedin.com/in/sagar-nigwekar-61192a15
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/scientific-contributions/Sagar-U-Nigwekar-38144360
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
rsnhope.org/kidneytalk/new-hope-for-a-calciphylaxis-diagnosis
provisionalFound in a cited public source but not yet independently corroborated. Published as a labeled candidate and queued for verification.How we verify →rsnhope.org ↗ - YouTube
youtube.com/watch
provisionalFound in a cited public source but not yet independently corroborated. Published as a labeled candidate and queued for verification.How we verify →youtube.com ↗ - LinkedIn
LinkedIn: Sagar Nigwekar, Co-Director, Kidney Research Center
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 1 Sept 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 →doctors.massgeneralbrigham.org ↗
- MBBS
Seth G. S. Medical College, University of Mumbai, India
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 →learn.hms.harvard.edu ↗ - MMSc (Master in Clinical Sciences)
Harvard Medical School
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 →learn.hms.harvard.edu ↗
Editorial & leadership roles
journal and society appointments- Co-Director
Kidney Research Center, Massachusetts General 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 →learn.hms.harvard.edu ↗ - Co-Chair
International Consensus Panel on Calciphylaxis
provisionalFound in a cited public source but not yet independently corroborated. Published as a labeled candidate and queued for verification.How we verify →calciphylaxis.mgh.harvard.edu ↗ - Founding member
International Calciphylaxis Advisory Panel
provisionalFound in a cited public source but not yet independently corroborated. Published as a labeled candidate and queued for verification.How we verify →calciphylaxis.mgh.harvard.edu ↗
Awards & honors
honors on the public record- Young Investigator Award
National Kidney Foundation
provisionalFound in a cited public source but not yet independently corroborated. Published as a labeled candidate and queued for verification.How we verify →kidney.org ↗ - Clinical Scientist in Nephrology Award
American Kidney Fund
provisionalFound in a cited public source but not yet independently corroborated. Published as a labeled candidate and queued for verification.How we verify →calciphylaxis.mgh.harvard.edu ↗ - Carl W. Gottschalk Research Scholar Grant
American Society of Nephrology
provisionalFound in a cited public source but not yet independently corroborated. Published as a labeled candidate and queued for verification.How we verify →calciphylaxis.mgh.harvard.edu ↗
Secondary affiliations
appointments beyond the home institution- Vascular Center
Massachusetts General 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 →massgeneral.org ↗ - Founding member
MGH Interdisciplinary Calciphylaxis Team
provisionalFound in a cited public source but not yet independently corroborated. Published as a labeled candidate and queued for verification.How we verify →calciphylaxis.mgh.harvard.edu ↗
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 →docwirenews.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 →massgeneral.org ↗
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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