MS
Accepting patients
Affiliated with a Castle Connolly Top Hospital
Who is Dr. Sarnak, Nephrologist in Boston, MA?
Dr. Mark Sarnak, MD is a Nephrologist, who primarily practices in Boston, MA. He is board certified. Dr. Sarnak graduated from Columbia Univ College of Physicians And Surgeons and completed his residency at Mass Gen Hosp, Internal Medicine. Dr. Sarnak is fluent in English, and is currently seeing new patients. Dr. Sarnak’s practice accepts Medicare, Aetna, Cigna, UnitedHealthcare and other major insurance plans. To book an appointment or to confirm insurance options, please call Dr. Sarnak’s office at (617) 636-5866.
What are Areas of Expertise for Dr. Sarnak?
Dr. Mark Sarnak, MD is a highly-rated, board-certified Nephrologist known for expertly diagnosing, treating, and managing a wide array of related conditions and procedures. Utilizing the latest medical advancements and evidence-based practices, Dr. Sarnak empowers patients to confidently navigate their health journey, specializing in Chronic Kidney Diseases, Kidney Stones, Transplant Medicine-Kidney, and comprehensive wellness support. Serving the Boston, MA community, Dr. Sarnak is dedicated to enhancing lives through expert, patient-centered care.
Where did Dr. Sarnak go to medical school and complete their residency?
Residency: Mass Gen Hosp, Internal Medicine
Medical School: Columbia Univ Coll of Physicians And Surgeons, New York Ny | Columbia Univ College of Physicians And Surgeons
Is Dr. Sarnak board certified as a Nephrologist?
Yes, Dr. Mark Sarnak, MD is board certified by the American Board of Internal Medicine
What languages does Dr. Sarnak speak?
Dr. Sarnak and their clinical team can communicate with patients in the following languages:
English
What conditions does a Nephrologist like Dr. Sarnak typically treat?
As a Nephrologist, Dr. Sarnak diagnoses, treats, and manages a wide range of conditions. This condition information is derived from anonymized insurance claims and highlights the medical conditions most commonly treated by Dr. Sarnak. It provides insight into the doctor’s areas of experience and expertise based on real-world patient encounters from the past two years, updated quarterly. Learn more about our claims-based healthcare methodology.
Also known as:
- Chronic Kidney Disease Stage 3b
- Chronic Kidney Disease, Stage 3a
- Chronic Kidney Disease, Stage 4 (Severe)
- Chronic Kidney Disease, Stage 2 (Mild)
- End-Stage Kidney Disease
- Chronic Kidney Disease Stage 5
- Chronic Kidney Disease from High Blood Pressure
- Chronic Kidney Disease
- Chronic Kidney Disease (CKD)
- Kidney Failure
- Helping Your Child Adapt to Life with Chronic Kidney Disease
- High Blood Pressure
- CKD Stage 3b
- Moderate Chronic Kidney Disease
- CKD Stage 3a
- CKD Stage 4
- Severe Chronic Kidney Disease
- CKD Stage 2
- Mild Chronic Kidney Disease
- ESRD
- End-Stage Renal Failure
- CKD Stage 5
- End-Stage Renal Disease
- Hypertensive Chronic Kidney Disease
- High Blood Pressure Kidney Disease
- Hypertension-Related Kidney Disease
ICD-10 Codes:
- N1832: Chronic kidney disease, stage 3b
- N1831: Chronic kidney disease, stage 3a
- N184: Chronic kidney disease, stage 4 (severe)
- N182: Chronic kidney disease, stage 2 (mild)
- N186: End stage renal disease
- N185: Chronic kidney disease, stage 5
- I129: Hypertensive chronic kidney disease with stage 1 through stage 4 chronic kidney disease, or unspecified chronic kidney disease
Also known as:
- Acute Kidney Failure
- Kidney Failure
- Acute Renal Failure
- Sudden Kidney Failure
ICD-10 Codes:
- N179: Acute kidney failure, unspecified
What procedures does a Nephrologist like Dr. Sarnak typically perform?
As a Nephrologist, procedures performed by Dr. Mark Sarnak may include:
- Dialysis
- Kidney and Urinary Perfusion Scan
- Kidney Biopsy
- Kidney Transplant
- Kidney Ultrasound
- Nephrology Consultation
- Nephrology Follow Up
- Peritoneal Dialysis
Please contact Dr. Sarnak's office directly to confirm care for your specific procedure, for more information, or to schedule a consultation.
Does Dr. Sarnak accept my insurance?
Dr. Sarnak accepts most major insurance plans. Important: Please call our office at (617) 636-5866 before your appointment to verify that your specific plan and network are accepted.
What insurance plans does Dr. Sarnak accept in Boston, MA?
Dr. Sarnak in Boston, MA accepts plans from many carriers. While this list is updated regularly, it is not a guarantee of coverage.
Top Insurances
Blue Cross Blue Shield of Massachusetts
BMC Health System
Cigna Group
Commonwealth Care Alliance
CVS Health (formerly Aetna)
Medicare
Point32Health
State of Massachusetts
UnitedHealth Group
Unknown
View All Insurances
Where is Dr. Sarnak's office located?
Recognitions
Castle Connolly Doctor’s Choice Awards
Doctor’s Choice - All Time
Among the most nominated for the Castle Connolly Top Doctor recognition across all time
Doctor’s Choice - 2025
Among the most nominated for the Castle Connolly Top Doctor recognition in 2025
Doctor’s Choice - Last 5 Years
Among the most nominated for the Castle Connolly Top Doctor recognition in the last 5 years
What is Dr. Sarnak's NPI number?An National Provider Identifier (NPI) is a unique ID number that identifies doctors and healthcare providers nationwide.
Dr. Sarnak's National Provider Identifier (NPI) number is 1982641502.
What common questions do patients ask about Dr. Sarnak?
Here are answers to patients Frequently Asked Questions (FAQ’s) about Dr. Sarnak
What is Dr. Mark Sarnak's specialty?
Dr. Sarnak is a Nephrologist near Boston, MA.
What does a Nephrologist do?
An internist who manages disorders related to the kidneys, including high blood pressure, fluid and mineral balance, and dialysis for waste removal when kidney function is impaired. This specialist also collaborates with surgeons regarding kidney transplantation.
Is this Dr. Mark Sarnak affiliated with a ranked Castle Connolly Top Hospital?
Yes, Dr. Sarnak is affiliated with Tufts Medical Center which is a Castle Connolly Top Hospital. Castle Connolly Top Hospitals are healthcare institutions recognized for their excellence in specific medical procedures and overall patient care. They are identified through a rigorous peer nomination process, evaluating factors like patient outcomes, quality of care, and expertise. The list recognizes hospitals that excel in 20 or more specific medical procedures, representing the top 25% nationwide. Castle Connolly Top Hospitals
When to see a Nephrologist?: Guides for symptoms, conditions, and treatments
Understand your symptoms and know when it’s time to see a Nephrologist. Explore insights from trusted medical experts on EverydayHealth.com, where you'll find the most relevant content and helpful condition guides for up-to date information about symptoms, causes, diagnosis, treatment and more. See all our health guides to find trusted information on medical conditions from our experts at Everyday Health.
Is Mark Sarnak accepting new patients in Boston, MA?
Yes, Dr. Mark Sarnak is accepting new patients at this time.
Does Dr. Mark Sarnak offer online booking?
Please contact Dr. Sarnak's office at (617) 636-5866 for information about online booking, telehealth, or to schedule an appointment.
How can I make an appointment with Mark Sarnak?
Please contact Dr. Sarnak's office at (617) 636-5866 for information regarding telehealth appointment availability or for scheduling assistance.
Which board certifications does Dr. Mark Sarnak have?
Dr. Mark Sarnak is certified by the American Board of Internal Medicine.
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Connect with DR. Sarnak
Tufts- New England Medical Center
800 Washington St
Boston, MA 02111