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

Dr. Marc Zelkowitz, MD

Individual provider Nephrology Physician · NPI 1609134576

Dr. Marc Zelkowitz, MD practises Nephrology in Englewood, New Jersey. Qualified in 2007, 19 years ago. Practices with Bergen County Improvement Authority, a 95-clinician group, works from 2 locations, accepts Medicare assignment and offers telehealth. Licensed in New Jersey.

Years since qualifying
19
Licensed in
NJ
In the registry since
2012
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

300 Grand Ave Ste 101
Englewood, NJ 07631-6300
Phone: (201) 567-5787
Fax: (201) 567-7652
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 250 Old Hook Rd Ste 303b, Westwood, NJ 07675-3123 — (201) 567-5787

Specialties & licences

Nephrology Physician (primary) Taxonomy 207RN0300X · Licence 25MA09115900 (NJ)

Record details

NPI number1609134576
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedApril 30, 2012
Last updated in NPPESAugust 22, 2025
Certification dateAugust 22, 2025

Medicare enrollment

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

Medicare specialtyNEPHROLOGY
Also practisesINTERNAL MEDICINE
Medical schoolOTHER
Graduated 2007 (19 years in practice)
Group practice Bergen County Improvement Authority — 95 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services
Practice locations2 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 patients593
Services billed 3,118 a service is one billed item, such as a visit, a test or a procedure
Average patient age78

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.

Compensation for services other than consulting , including serving as faculty or as a speaker at a venue other than a continuing education program $11,000 7 payments
Food and Beverage $1,829 113 payments · a meal or drink at a meeting or visit, not a fee
Travel and Lodging $266 2 payments · travel or lodging paid or reimbursed, such as to attend a conference
Education $14 2 payments · educational material or training, 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. Those with a page here are linked.

Colleagues at Bergen County Improvement Authority

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 95 clinicians in the practice; 12 are shown here.

Other providers in Englewood