Robert Czyzewski, M.D.
NPI 1558304782ActiveIndividual· Internal Medicine, Nephrology· Edison, NJ
Internal Medicine, Nephrology (M.D.) with Avenel Iselin Medical Group, LLC and 1 other group, practicing in Edison, New Jersey. Their prescriptions cost Medicare Part D more than their services did: $1,648,671 for 12,198 claims, against $875,700 paid for services in 2024. Astrazeneca Pharmaceuticals LP was the largest of 22 companies reporting payments in 2025, $1,609 in all, mostly food and beverage. Lists Hackensack University Medical Center and 4 other hospitals as hospital affiliations.
Overview
| NPI | 1558304782 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Jun 14, 2006 |
| Last updated in NPPES | Jan 14, 2011 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Nephrology Primary | 207RN0300X | 25MA06769000 | NJ |
| Specialist | 174400000X | 25MA06769000 | NJ |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Oct 9, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 10, 2026 | No match | — |
| New York OMIG · Nov 10, 2026 | No match | — |
| Ohio Medicaid · Nov 10, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 10, 2026 | No match | — |
| Washington HCA · Nov 10, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Nephrology (NJ) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 1,131 |
|---|---|
| Services billed | 10,695 across 39 procedure codes |
| Paid by Medicare | $875,700 |
Part D prescriptions in 2024
| Prescriptions (claims) | 12,198 · 17,021 30-day fills |
|---|---|
| Patients | 730 |
| Total drug cost | $1,648,671 |
| Generic share | 83% of claims |
Education and affiliations
| Graduation year | 1992 |
|---|---|
| Medicare specialty | Nephrology |
| Secondary specialties | Internal Medicine |
Medical groups
- Avenel Iselin Medical Group, LLCIselin, NJ · 18 clinicians
- Linden Medical Group, LLCLinden, NJ · 2 clinicians
Hospital affiliations
- Hackensack University Medical CenterHackensack, NJ
- Jfk University Medical CenterEdison, NJ
- Raritan Bay Medical CenterPerth Amboy, NJ
- Robert Wood Johnson University Hospital at RahwayRahway, NJ
- Trinitas Regional Medical CenterElizabeth, NJ
Other facilities
- Davita ElmoraDialysis facility · Elizabeth, NJ
- Davita MetuchenDialysis facility · Metuchen, NJ
- Davita Rahway DialysisDialysis facility · Rahway, NJ
- Davita South EdisonDialysis facility · Edison, NJ
- Davita Woodbridge Dialysis CenterDialysis facility · Woodbridge, NJ
- Bayada Home Health Care, Inc.Home health agency · Cranford, NJ
- Hackensack Meridian Jfk at HomeHome health agency · Iselin, NJ
- Hackensack Meridian LtachLong-term care hospital · Perth Amboy, NJ
- Kindred Hospital New Jersey - Morris CountyLong-term care hospital · Dover, NJ
- Adroit Care Rehabilitation and Nursing CenterNursing home · Rahway, NJ
- Care Connection RahwayNursing home · Rahway, NJ
- Careone at the HighlandsNursing home · Edison, NJ
- Raritan Post Acute and Healthcare CenterNursing home · South Amboy, NJ
- St Joseph's Home Al & Nc, IncNursing home · Woodbridge, NJ
Industry payments (Open Payments)
- 2025$1,609 · 107 payments from 22 companies
- 2024$2,114 · 116 payments from 28 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Astrazeneca Pharmaceuticals LP | $318.58 | 32 |
| Ani Pharmaceuticals, Inc. | $173.13 | 10 |
| Bayer Healthcare Pharmaceuticals Inc. | $160.24 | 9 |
| Travere Therapeutics, Inc. | $120.30 | 7 |
| Ardelyx, Inc. | $119.09 | 7 |
What the 2025 payments were for
- Food and Beverage$1,609 · 107 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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