DR. MARC ZELKOWITZ (M.D.) – Nephrology Physician, NPI 1609134576
Nephrology Physician
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Doctor Profile
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Profile Insights
NPPES metrics only — not quality of care.
6,893 INTERNAL MEDICINE in NJ
Provider Addresses for DR. MARC ZELKOWITZ (M.D.)
300 GRAND AVE STE 101
ENGLEWOOD, NJ 076316300
Phone: (201) 567-5787
Fax: (201) 567-7652
Type: Mailing
250 Old Hook Rd Ste 303B
Westwood, NJ 076753123
Phone: (201) 567-5787
Fax: (201) 567-7652
Type: Location
120 W 22ND ST STE 200
OAK BROOK, IL 605231563
Phone: (630) 573-5000
Type: Mailing
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
CMS reports 106 Open Payments records for all available years, with a total value of $1,749.
Total Amount is formed as General ($1,749) + Research ($0) + Ownership ($0) = $1,749.
Last reported payment date: 2024-12-20 • Largest payer in this snapshot: Ascendis Pharma Inc ($233).
Total Amount
$1,749
General + Research + Ownership
Payments
106
Total payment records
General Amount
$1,749
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2024-12-20
Latest reported date
Top Companies
Largest payers in this snapshot
| Company | Amount |
|---|---|
| Ascendis Pharma Inc | $233 |
| Amgen Inc. | $228 |
| AstraZeneca Pharmaceuticals LP | $224 |
| Bayer Healthcare Pharmaceuticals Inc. | $218 |
| Horizon Therapeutics plc | $217 |
Medicare Enrollment & Revalidation
Source: CMS public data · Not endorsed by CMS ·
Educational use only—not medical, billing, or legal advice.
PECOS enrollment status
Participating (accepts Medicare assignment)
Enrollment effective: 2012-06-18
PECOS data refreshed: 2026-05-27
Medicare revalidation (CMS due date list)
Due date not assigned yet
CMS is tracking this Medicare enrollment for revalidation, but has not published a due date.
Enrollment records
1
Earliest due date
Not assigned (TBD)
CMS data updated
2026-06-01
Revalidation progress
- Medicare enrolled
- On CMS revalidation list
- Due date assigned
- Revalidate in PECOS
CMS enrollment records
| Enrollment ID | Type | Specialty | State | Due date |
|---|---|---|---|---|
| I20120618000528 | I | Nephrology | NJ | TBD |
What to do next
- No action required while the due date shows TBD.
- Check the CMS Revalidation Lookup Tool periodically — CMS updates the list about every 60 days.
- Do not submit a revalidation application in PECOS until CMS publishes a concrete due date.
Prepare CMS-855 application → · Look up this NPI in PECOS → · Verify on CMS PECOS
Medicare Utilization (FFS)
Source: CMS public data · Not endorsed by CMS · Beneficiary counts under 11 are suppressed in source data ·
Educational use only—not medical, billing, or legal advice.
Top Medicare procedures (2023) · refreshed 2026-05-27
| HCPCS | Description | Services | Beneficiaries | Medicare allowed |
|---|---|---|---|---|
| 99490 | Chronic care management services, first 20 minutes of clinical staff time directed by health care professional, per calendar month | 347 | 54 | $0 |
| 99232 | Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes | 337 | 179 | $0 |
| 99214 | Established patient office or other outpatient visit, 30-39 minutes | 305 | 172 | $0 |
| 90960 | Dialysis services, 4 or more physician visits per month (20 years or older) | 156 | 46 | $0 |
| 99233 | Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes | 134 | 81 | $0 |
Insurance plans in this area (ZIP 07631)
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Provider's Procedures
| Specialty | Practice State | HCPCS Code | Description | Service Count | Beneficiary Count |
|---|---|---|---|---|---|
| NEPHROLOGY | NJ | 81002 | Urinalysis, manual test | 14 | 14 |
Group practice members
| Name | Specialty | State |
|---|---|---|
| N E P H R O L O G Y | IL | |
| Internal Medicine, Nephrology | NJ | |
| N E P H R O L O G Y | NY |
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