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 with 1 additional practice location. He is board certified by the American Board of Internal Medicine. 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, UnitedHealthcare, Aetna, Cigna 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 or procedures. Utilizing the latest medical advancements and evidence-based practices, Dr. Sarnak empowers patients to confidently navigate their health journey, specializing in Chronic Kidney Disease, Kidney Stones, Transplant Medicine-Kidney, or 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 in 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 Dr. Sarnak 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.
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, Stage 3
- Chronic Kidney Disease, Stage 1
- 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
- CKD Stage 3
- CKD Stage 1
- Early Chronic 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
- N1830: Chronic kidney disease, stage 3 unspecified
- N181: Chronic kidney disease, stage 1
Also known as:
- Acute Kidney Failure
- Kidney Failure
- Acute Renal Failure
- Sudden Kidney Failure
ICD-10 Codes:
- N179: Acute kidney failure, unspecified
Also known as:
- High Blood Pressure
- Hypertension
- Primary Hypertension
- Essential Hypertension
ICD-10 Codes:
- I10: Essential (primary) hypertension
Also known as:
- Having a Kidney Transplant
- Kidney Transplantation
- Kidney Transplant
- Renal transplant
- Kidney replacement surgery
- Post-kidney transplant
ICD-10 Codes:
- Z940: Kidney transplant status
Also known as:
- Type 2 Diabetes with Chronic Kidney Disease
- Diabetes Type 2
- Diabetic Kidney Problems
- Type 2 diabetes
- Diabetic Chronic Kidney Disease
- Long-term Kidney Failure from Type 2 Diabetes
- Type 2 Diabetes End-Stage Renal Disease
ICD-10 Codes:
- E1122: Type 2 diabetes mellitus with diabetic chronic kidney disease
Also known as:
- Low Sodium Levels
- Fluid and Electrolyte Balance
- Sodium
- Hyponatremia
- Low Blood Sodium
- Sodium Deficiency
ICD-10 Codes:
- E871: Hypo-osmolality and hyponatremia
Also known as:
- Other Secondary High Blood Pressure
- High Blood Pressure
- Other Secondary Hypertension
- High Blood Pressure from Other Causes
ICD-10 Codes:
- I158: Other secondary hypertension
Also known as:
- Kidney Stones
- Renal Calculi
- Nephrolithiasis
- Kidney Calculi
ICD-10 Codes:
- N200: Calculus of kidney
Also known as:
- Nephritic Syndrome
- Kidney Disease
- Kidney Inflammation Syndrome
- Acute Nephritis
- Chronic Nephritis
ICD-10 Codes:
- N058: Unspecified nephritic syndrome with other morphologic changes
Also known as:
- Vitamin D Deficiency
- Low Vitamin D Levels
- Lack of Vitamin D
- Hypovitaminosis D
ICD-10 Codes:
- E559: Vitamin D deficiency, unspecified
Also known as:
- Lupus kidney disease
- Kidney Disease
- Lupus
- Lupus nephritis
- Kidney inflammation from lupus
- Glomerulonephritis in SLE
ICD-10 Codes:
- M3214: Glomerular disease in systemic lupus erythematosus
Also known as:
- Acute Kidney Failure with Tubule Damage
- Kidney Failure
- Acute Tubular Necrosis
- ATN
- Kidney Tubule Death
ICD-10 Codes:
- N170: Acute kidney failure with tubular necrosis
Which procedures does Dr. Sarnak perform as a Nephrologist?
As a Nephrologist, procedures performed by a Dr. Mark Sarnak may include:
- Dialysis
- Kidney and Urinary Perfusion Scan
- Kidney Biopsy
- Kidney Transplant
- Kidney Ultrasound
- Nephrology Consultation
- Nephrology Follow Up
- Peritoneal Dialysis
For detailed information, please contact Dr. Sarnak's office.
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
All Other Third Party
Blue Cross Blue Shield of Massachusetts
Boston Medical Center
CVS Health (formerly Aetna)
Express Scripts
Medicare
Molina
Point32Health
State of Massachusetts
UnitedHealthcare
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. 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. Contact Dr. Sarnak to book an appointment today.
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
Where can I learn more about Nephrologist?
Explore Nephrologist with 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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