Marc Zelkowitz, M.D.
NPI 1609134576 · Nephrology Physician · Englewood, NJ
Enrolled with Medicare as Practitioner - Nephrology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Marc Zelkowitz, M.D. is a Nephrology Physician provider in Englewood, NJ (NPI 1609134576).
Provider details
- NPI number
- 1609134576
- Entity type
- Individual
- Primary specialty
- Nephrology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 25MA09115900 (NJ)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
14 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)25% of score
2,615 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our .
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Visit Complexity Inherent to Evaluation and Management Associated With Medical Care Services That Serve As the Continuing Focal Point for All Needed Health Care Services And/Or With Medical Care Services That Are Part of Ongoing Care Related to a Patient'SG2211 | 663 | $18 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 454 | $111 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 299 | $83 |
| Chronic Care Management Services, First 20 Minutes of Clinical Staff Time Directed By Health Care Professional, Per Calendar Month99490 | 188 | $63 |
| Dialysis Services, 4 Or More Physician Visits Per Month (20 Years Or Older)90960 | 187 | $382 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 25 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Dapagliflozin Propanediolbrand: Farxiga | 166 | 32 |
| Losartan Potassium | 134 | 43 |
| Calcitriol | 112 | 38 |
| Amlodipine Besylate | 82 | 29 |
| Empagliflozinbrand: Jardiance | 53 | 19 |
| Furosemide | 49 | 22 |
| Finerenonebrand: Kerendia |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$750 across 43 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Additional practice locations (1)
- 250 Old Hook Rd Ste 303bWestwood, NJ 07675-3123Phone: (201) 567-5787Fax: (201) 567-7652
Registry dates
- Enumerated
- 2012-04-30
- Last updated
- 2025-08-22
- Certified
- 2025-08-22
Frequently asked questions
- What is Marc Zelkowitz's NPI number?
- Marc Zelkowitz's National Provider Identifier (NPI) is 1609134576, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Marc Zelkowitz's specialty?
- Marc Zelkowitz is listed in the NPPES registry with a primary specialty of Nephrology Physician (Allopathic & Osteopathic Physicians).
- Where is Marc Zelkowitz located?
- Marc Zelkowitz's practice location on file with NPPES is 300 Grand Ave Ste 101, Englewood, NJ 07631-6300.
- What is Marc Zelkowitz's phone number?
- The practice phone number listed in the NPPES registry for Marc Zelkowitz is (201) 567-5787.
- Does Marc Zelkowitz accept Medicare?
- Marc Zelkowitz is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Marc Zelkowitz's NPI active?
- Yes — Marc Zelkowitz's NPI (1609134576) is active in the NPPES registry as of the last update on 2025-08-22.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.