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License & Identifications

A medical license is required for a doctor to practice medicine in a particular state. Requirements vary by state but most require, at a minimum, post-graduate training in the doctor’s specific specialty. An NPI number is a national identifier unique to an individual health care provider and is managed by the Center for Medicare & Medicaid Services (CMS).

Patient Reviews

Patient comments (2)

The overall average patient rating of Dr. Mark Sarnak is Excellent. Dr. Sarnak has been reviewed by 2 patients who have provided 2 comments. The rating is 5 out of 5 stars.

Patient Ratings
Ease of Appointment 3.7
Promptness 4.3
Courteous Staff 4.3
Accurate Diagnosis 5.0
Bedside Manner 5.0
Spends Time with Me 5.0
Follows Up After Visit 5.0

Specialties & Research

Dr. Mark Sarnak, MD, MS is board certified in Nephrology.

  • He has special expertise in 9 areas:
  • Cardiovascular Disease
  • Diabetic Kidney Disease (Diabetic Nephropathies)
  • High Blood Pressure (Hypertension)
  • Kidney Dialysis (Renal Dialysis)
  • Kidney Disease
  • Kidney Failure
  • Kidney Failure (Chronic Renal Insufficiency)
  • Kidney Stones (Kidney Calculi)
  • Kidney Transplant (Renal Transplant)

Education & Awards

Dr. Sarnak graduated from Columbia University, New York. He has 11 awards.

One of America's Leading Experts on:
Cardiovascular Diseases
Kidney Diseases
Kidney Failure
2010, Notable Teaching Award from 3rd year TUSM students
2012, "Top Doctor," U.S. News & World Report
2005, Annals of Internal Medicine, top 10% of reviewers
2005, 2007 Oliver Smith Award for Patient Care
2001, Excellence in Teaching in Medicine Clerkship, Tufts University School of Medicine
2008, Best Teacher Award Tufts Medical Center Residents
2012, "Top Doctor," Boston Magazine
Castle Connolly's Top Doctors™ (2012 - 2013)


Dr. Sarnak has 3 hospital affiliations:

  • Caritas St. Elizabeth's Medical Center 
  • Tufts Medical Center 
  • New England Med Ctr - Outpt 

> > > > Dr. Mark Sarnak, MD, MS

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Additional Information
Dr. Mark Jonathan Sarnak MD and MS is a male Nephrologist, has 18 years of experience and practices in Nephrology.
Where does Dr. Mark J. Sarnak practice?
Dr. Mark Sarnak has 6 office locations.
Dr. Mark Sarnak practices Nephrology near Boston, MA.
Additional practice locations include: Somerville, MA and Woburn, MA.
See Boston Nephrologists.