Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of October 4, 2026.
NPIDirectory

Erwin Mermelstein, MD

Individual provider Interventional Cardiology Physician · NPI 1538102843

Erwin Mermelstein, MD is registered under Cardiovascular Disease (Cardiology) in East Brunswick, New Jersey. Graduated from Js Weill Medical College, Cornell University in 1978, 48 years ago. Practices with Robert Wood Johnson Medical Associates at Hamilton PA, a 45-clinician group and accepts Medicare assignment. Licensed in New Jersey.

Years since qualifying
48
Trained at
Js Weill Medical College, Cornell University
Licensed in
NJ
In the registry since
2006
Specialties on file
2
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

593 Cranbury Rd Ste 2
East Brunswick, NJ 08816
Phone: (732) 390-3333
Fax: (732) 390-9244
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Cardiovascular Disease Physician (primary) Taxonomy 207RC0000X · Licence 25MA04203400 (NJ)
Interventional Cardiology Physician Taxonomy 207RI0011X · Licence 25MA04203400 (NJ)

Record details

NPI number1538102843
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedJune 14, 2006
Last updated in NPPESApril 17, 2025
Certification dateApril 17, 2025

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyCARDIOVASCULAR DISEASE (CARDIOLOGY)
Medical schoolJS WEILL MEDICAL COLLEGE, CORNELL UNIVERSITY
Graduated 1978 (48 years in practice)
Group practice Robert Wood Johnson Medical Associates At Hamilton Pa — 45 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations5 on file with Medicare

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients988
Services billed 3,575 a service is one billed item, such as a visit, a test or a procedure
Average patient age77

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Payments from drug and device companies, 2025

Drug and device makers are required by federal law (the Physician Payments Sunshine Act) to report what they pay or give to clinicians, and CMS publishes the reports as Open Payments. This is the 2025 program year. A report is a record of a payment, not an allegation of anything, and many are small items such as meals. Only general payments are listed here; research payments and ownership or investment interests are reported separately by CMS and are not shown.

Food and Beverage $54 3 payments · a meal or drink at a meeting or visit, not a fee

Each amount is the sum of what companies reported for that kind of payment in 2025, rounded to the dollar. Not all of it is income to the clinician: a meal is not a fee, a charitable contribution goes to a charity, and a royalty or an acquisition payment is not a salary.

Check a report, or dispute one, at the source in CMS’s own tool, Open Payments. Corrections go through CMS’s dispute process. This site removes a home address on request and asks for no proof, because that is privacy; it will not remove an accurate payment report on request, because that is a statutory public disclosure.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician.

Colleagues at Robert Wood Johnson Medical Associates at Hamilton PA

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 45 clinicians in the practice; 12 are shown here.

Other providers in East Brunswick