Elizabeth Sarah Hammer, MD
NPI 1104117340ActiveIndividual· Internal Medicine, Nephrology· Brooklyn, NY
Internal Medicine, Nephrology (MD) in Brooklyn, New York, trained at Icahn School of Medicine at Mount Sinai (class of 2011). Their prescriptions cost Medicare Part D more than their services did: $371,875 for 1,499 claims, against $133,168 paid for services in 2024. Travere Therapeutics, Inc. was the largest of 6 companies reporting payments in 2025, $185.55 in all, mostly food and beverage.
Overview
| NPI | 1104117340 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Apr 21, 2011 |
| Last updated in NPPES | Apr 9, 2021 |
| Certified by provider | Apr 9, 2021 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Nephrology Primary | 207RN0300X | 268356 | NY |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Nov 10, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 11, 2026 | No match | — |
| New York OMIG · Nov 11, 2026 | No match | — |
| Ohio Medicaid · Nov 11, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 11, 2026 | No match | — |
| Washington HCA · Nov 11, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Nephrology (NY) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 322 |
|---|---|
| Services billed | 1,333 across 25 procedure codes |
| Paid by Medicare | $133,168 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,499 · 3,283 30-day fills |
|---|---|
| Patients | 243 |
| Total drug cost | $371,875 |
| Generic share | 79% of claims |
Education and affiliations
| Medical school | Icahn School of Medicine at Mount Sinai |
|---|---|
| Graduation year | 2011 |
| Medicare specialty | Nephrology |
| Telehealth | Offers telehealth |
Medical group
- New York UniversityNew York, NY · 6,134 clinicians
Hospital affiliation
- NYU Langone HospitalsNew York, NY
Other facilities
- Bayridge Sunset Pk Dialysis CtrDialysis facility · Brooklyn, NY
- Bcrd Williamsburg Center for Renal DialysisDialysis facility · Brooklyn, NY
Industry payments (Open Payments)
- 2025$185.55 · 10 payments from 6 companies
- 2024$239.50 · 11 payments from 7 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Travere Therapeutics, Inc. | $52.80 | 4 |
| Novartis Pharmaceuticals Corporation | $49.17 | 2 |
| Akebia Therapeutics Inc | $28.46 | 1 |
| Bayer Healthcare Pharmaceuticals Inc. | $22.99 | 1 |
| Vifor Pharma, Inc. | $16.50 | 1 |
What the 2025 payments were for
- Food and Beverage$185.55 · 10 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 159 nephrologists in Brooklyn · All nephrologists in New York