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26 million American adults have kidney disease… and most don’t know it.

Nephrology specialists at Pentucket Medical bring not only their expertise to the treatment of kidney diseases, but also the attitude that you, the patient, deserve the very best. Effective treatment of multi-faceted diseases like electrolyte disorders, hypertension, and end-stage renal disease require a team approach.

Your nephrology specialist understands that your Primary Care Clinician plays a key role in managing your health concerns and with our integrated System of Care, your nephrologist is in constant contact with your Primary Care Clinician. Our Electronic Medical Record allows those who are caring for you to have consistently accurate, current health information for you.

Pentucket Medical recognizes that it can be scary when you’re facing something as complicated as kidney disease. There is much that can be done to preserve kidney function and prevent problems if we all work together and take the right steps to prevent complications. 

Care Team

Joshua Tarkan, MD, Emily Dulude, MD, and Sangeeta S. Nadkarni, MD comprise Merrimack Valley’s best trained, most experienced and well supported Nephrology group.


Pentucket Medical has remained committed to ensuring the safety of our patients during the COVID-19 pandemic.

Since June 1, we have been treating patients on-site per the four-phase guidance issued to healthcare facilities by Governor Baker and the Massachusetts Department of Health and Human Services.

In the coming weeks, we will continue following stringent infection prevention processes and implementing specific precautions to ensure a safe environment for essential patient care services.

Here are some of the changes you will see on your next visit to Pentucket Medical:

When scheduling an appointment with a clinician, you will be provided a phone number to call when you arrive at the office this will allow you to remain safe in your car until it is time to see your provider essentially cutting out waiting rooms

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