Dr. Marc Zelkowitz, MD
- Medicare services, 2024
- 2,615
- Medicare patients, 2024
- 593
- Part D claims, 2024
- 1,329
- Hospital affiliations
- 5
- Industry payments
- $17,395
- Practice address
- 300 Grand Ave Ste 101 Suite 101, Englewood, NJ 07631
- Practice phone
- Call (201) 567-5787
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Bergen Kidney Center
Primary care practice · Englewood, New Jersey
Find Dr. Zelkowitz's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Dr. Marc Zelkowitz is a nephrologist in Englewood, New Jersey
Dr. Zelkowitz practices at Bergen Kidney Center in Englewood, New Jersey.
Dr. Zelkowitz's NPI, 1609134576, was assigned on April 30, 2012. Dr. Zelkowitz graduated from Albert Einstein College of Medicine of Yeshiva University in 2007. Dr. Zelkowitz holds New Jersey license 25MA09115900.
- NPI
- 1609134576NPI Registry (opens in a new tab)
- Medicare PAC ID
- 6507020880
- NPI enumeration date
- April 30, 2012
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Practice phone
- (201) 567-5787
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 45
- Medical school graduation
- 2007
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Marc Zelkowitz practices at Bergen Kidney Center in Englewood, New Jersey
Dr. Zelkowitz's primary practice is Bergen Kidney Center, at 300 Grand Ave Ste 101 Suite 101, Englewood, NJ 07631. The practice phone is (201) 567-5787.
- Bergen Kidney Center300 Grand Ave Ste 101 Suite 101, Englewood, NJ 07631Phone(201) 567-5787
Source: Dmand AI Affiliation Data
Dr. Marc Zelkowitz is affiliated with 9 sites of care and 2 medical groups
Dr. Zelkowitz's primary practice is Bergen Kidney Center in Englewood, New Jersey. Dr. Zelkowitz is also affiliated with Englewood Hospital. The medical group on file is Bergen Kidney Center. Dmand AI also links Dr. Zelkowitz to 4 more hospitals, 3 dialysis centers and 1 medical group, each named with a free account.
Source: Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. Marc Zelkowitz's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Zelkowitz practices, 9 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Bergen Kidney Center | Available with a free account |
| +8 more sites and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Marc Zelkowitz is one of 399 nephrologists in New Jersey
Nephrology is Dr. Zelkowitz's primary specialty in the NPI Registry, under taxonomy code 207RN0300X. Dr. Zelkowitz is licensed in New Jersey.
Specialties and state licenses
- Nephrology, New JerseyPrimary
Nephrologists near Dr. Zelkowitz
Counts of nephrologists with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Marc Zelkowitz billed Medicare for 2,615 services in 2024
CMS data shows 2,615 Medicare services from Dr. Zelkowitz across 19 procedure codes in 2024, for 593 Medicare patients. Medicare paid $202,153 for them.
Dr. Zelkowitz's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 1,4942024: 1,71315%
- Other services
- 2023: 02024: 663
- Tests and treatments
- 2023: 2342024: 2392%
Where Dr. Zelkowitz's Medicare services took place, 2024
- In an office1,97576%
- In a facility64024%
Dr. Zelkowitz compared with the New Jersey median for nephrologists, 2024
- Dr. Zelkowitz
- New Jersey median
- Medicare services
- 2,615vs 1,38289% above
- Medicare patients
- 593vs 37160% above
- Part D claims
- 1,086vs 94515% above
Medians across 397 nephrologists in New Jersey with Dmand AI profiles that report each measure.
Dr. Zelkowitz's most billed Medicare procedure codes, 2024
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
Need commercial claims for Dr. Zelkowitz?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Zelkowitz and other nephrologists in New Jersey.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Marc Zelkowitz treated 593 Medicare patients in 2024, average age 78
CMS counts 593 Medicare patients who saw Dr. Zelkowitz in 2024. The largest group is 75 to 84, with 232 patients. 75% of them have chronic kidney disease, and 75% have high blood pressure. 16% are also on Medicaid. Their average risk score is 2.96, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.
Across all payers, Dmand AI patient panel data puts Dr. Zelkowitz's median patient age at 73, with 38% women.
Dr. Zelkowitz's Medicare patients by age, 2024
Dr. Zelkowitz's Medicare patients by sex, 2024
- Women25543%
- Men33857%
Chronic conditions among Dr. Zelkowitz's Medicare patients, 2024
- Chronic kidney disease75%
- High blood pressure75%
- High cholesterol75%
- Diabetes54%
- Ischemic heart disease50%
- Arthritis49%
- Heart failure42%
- Atrial fibrillation33%
Share of Medicare patients with each condition. A patient can have several.
Dr. Zelkowitz's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 73
Patient panel by sex, all payers
- Women38%
- Men58%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Marc Zelkowitz wrote 1,329 Medicare Part D claims in 2024
In 2024, Dr. Zelkowitz wrote 1,329 Medicare Part D claims for 226 patients. 69% of them were for generic drugs. CMS names the drug for 1,086 of them, across 25 drugs with 11 or more claims each, at $350,949 in total drug cost. In 2023, CMS named 756 claims across 18 drugs.
Dr. Zelkowitz's Part D claims by kind of drug, 2024
- Generic916 claims69%
- Brand-name and other413 claims31%
Dr. Zelkowitz's most prescribed drugs by claims, 2024
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 7562024: 1,08644%
Drugs named by CMS: 25 in 2024, 18 in 2023.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
Dr. Marc Zelkowitz offers telehealth to Medicare patients
Dr. Zelkowitz accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Zelkowitz as offering telehealth.
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. Marc Zelkowitz received $17,395 in industry payments from 2017 to 2025
CMS Open Payments shows 388 general payments to Dr. Zelkowitz from 27 drug and device companies from 2017 to 2025. Speaker and faculty fees make up the largest share, 64% of the total. Ardelyx, Inc. paid the most, $12,208. It also lists 1 research payment totaling $1,225 in 2025.
General payments to Dr. Zelkowitz by program year, 2017 to 2025
General payments to Dr. Zelkowitz by kind, 2017 to 2025
- Speaker and faculty fees$11,20064%
- Food and beverage$5,64532%
- Travel and lodging$2662%
- Consulting fees$2381%
- Education$470%
Companies that paid Dr. Zelkowitz the most, 2017 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Marc Zelkowitz graduated from Albert Einstein College of Medicine of Yeshiva University
Dr. Zelkowitz graduated from Albert Einstein College of Medicine of Yeshiva University in 2007.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Marc Zelkowitz's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | Dmand AI Affiliation Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation Data |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. Marc Zelkowitz
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. Marc Zelkowitz's NPI number?
Dr. Marc Zelkowitz's NPI number is 1609134576. It was assigned on April 30, 2012, and it is active in the NPI Registry.
What kind of doctor is Dr. Marc Zelkowitz?
Dr. Marc Zelkowitz is a nephrologist in Englewood, New Jersey. The primary specialty in the NPI Registry is Nephrology Physician (taxonomy code 207RN0300X).
Where does Dr. Marc Zelkowitz practice?
Dr. Zelkowitz practices at 300 Grand Ave Ste 101 Suite 101, Englewood, NJ 07631. Dr. Zelkowitz's primary practice is Bergen Kidney Center in Englewood, New Jersey. Dmand AI also links Dr. Zelkowitz to 4 hospitals, 3 dialysis centers and 1 medical group.
What is Dr. Marc Zelkowitz's office phone number?
The practice phone on file for Dr. Zelkowitz is (201) 567-5787.
What is Dr. Marc Zelkowitz's medical license number?
Dr. Zelkowitz holds New Jersey license 25MA09115900.
Which hospitals is Dr. Marc Zelkowitz affiliated with?
Dr. Zelkowitz is affiliated with Englewood Hospital. Dmand AI links Dr. Zelkowitz to 4 more hospitals.
What medical group is Dr. Marc Zelkowitz part of?
Dr. Zelkowitz is linked to Bergen Kidney Center. Dmand AI links Dr. Zelkowitz to 1 more medical group.
Does Dr. Marc Zelkowitz accept Medicare?
Yes. CMS data shows Dr. Zelkowitz billed Medicare for 2,615 services in 2024, and Dr. Zelkowitz accepts Medicare assignment.
Does Dr. Marc Zelkowitz offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. Zelkowitz as offering telehealth services.
How many Medicare patients does Dr. Marc Zelkowitz see?
CMS counts 593 Medicare patients who saw Dr. Zelkowitz in 2024, with an average age of 78.
Show 5 more questionsShow fewer questions
What services does Dr. Marc Zelkowitz bill to Medicare?
In 2024, Dr. Zelkowitz's most billed Medicare services were medicare service (G2211), office visit, established patient (99214) and hospital inpatient care (99232).
Where did Dr. Marc Zelkowitz go to medical school?
Dr. Zelkowitz graduated from Albert Einstein College of Medicine of Yeshiva University in 2007.
What drugs does Dr. Marc Zelkowitz prescribe most?
In 2024 Medicare Part D data, Dr. Zelkowitz's most prescribed drugs by claims were Farxiga, Losartan Potassium and Calcitriol.
Has Dr. Marc Zelkowitz received payments from drug or device companies?
CMS Open Payments shows $17,395 in general payments to Dr. Zelkowitz from 27 companies from 2017 to 2025. The largest total came from Ardelyx, Inc.
How long has Dr. Marc Zelkowitz been practicing?
Dr. Zelkowitz graduated from medical school in 2007, 19 years ago.
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