About Sagar Nigwekar, MBBS, MD

Departments, Centers, & Programs:

Clinical Interests:

Treats:

Languages:

Locations

Mass General Renal Associates
165 Cambridge Street
Suite 302
Boston, MA 02114
Phone: 617-726-5050

Medical Education

  • MD, Seth G. S. Medical College
  • Residency, Rochester General Hospital
  • Fellowship, Brigham and Women's Hospital

American Board Certifications

  • Internal Medicine, American Board of Internal Medicine
  • Nephrology, American Board of Internal Medicine

Note: This provider may accept more insurance plans than shown; please call the practice to find out if your plan is accepted.


Research

My research is primarily focused on the areas of calcific uremic arteriolopathy (CUA), a.k.a. calciphylaxis and vascular calcification in dialysis patients.

CUA, a dermal arteriolar calcification disorder seen in dialysis patients, has significant morbidity associated with complicated wounds and non-remitting pain and 60-80% one-year mortality. During my nephrology training, I saw many CUA cases and was astounded by the unmet research needs in the CUA field linked to: 1) Unclear pathogenesis and risk factors, 2) Non-existence of circulating diagnostic biomarkers considering the risk of non-healing ulceration from skin biopsy (the current diagnostic gold-standard) and, 3) Absence of effective therapy.

I am interested in understanding the risk factors and pathobiology of CUA, and to develop and examine strategies to effectively diagnose and treat CUA. In addition, I aim to apply the knowledge gained from CUA research to investigate other forms of vascular calcifications in dialysis patients. Over 70% of dialysis patients have coronary artery, aortic or valvular calcifications, and recent literature attributes 50% of cardiovascular deaths in dialysis patients to vascular calcifications. Although, Virchow described the predisposition to vascular calcifications in kidney disease over a century ago, the biology of vascular calcification remains unclear and this limits development and evaluation of treatment interventions. I believe that CUA research will serve as a high-speed template to understand the biology of vascular calcification and accelerate the T2 translational research in this field.

Publications

Reviews: Comments and Ratings

5.0out of 5(56 Ratings, 25 Comments)

June 2025

The nephrologist was knowledgeable and kind


May 2025

I always have a great experience with my doctor.


May 2025

My son is very comfortable with this doctor and his colleagues.


May 2025

Very knowledgeable and friendly.


May 2025

Dr. Nigwekar is very concerned as to the medications that he has prescribed for me are working to lower my potassium.


April 2025

This provider is very efficient, knows what I, what issues I had and takes care of them and discusses them before we leave the appointment. I definitely would recommend [redacted]


March 2025

Dr. Nigwekar is very thorough and reliable as pertain to my renal specific and overall health. I always leave and return with the assurance that my needs were addressed and monitored. He treats the total person, medically, socially, and well-being in general.


March 2025

Dr. Nigwekar is possibly one of the most dedicated, genuinely caring, thorough physicians you have on your staff. You are very lucky to have him.


February 2025

Dr. Nigwekar was very attentive, he was thorough, and he was very engaging. He listened carefully and I highly recommend him. In addition, his fellow, Dr. [redacted], was also extremely engaging and attentive to detail and I would highly recommend him as well. Thank you very much.


January 2025

Provider is very knowledgeable, Personable, approachable and a great listener.

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