Arundathi Namassivaya, MD
NPI 1790807410ActiveIndividual· Internal Medicine, Nephrology· Amherst, NY
Internal Medicine, Nephrology (MD) with Nephrology Associates of Western New York, LLP, practicing in Amherst, New York. Their prescriptions cost Medicare Part D more than their services did: $593,859 for 2,127 claims, against $112,748 paid for services in 2024. Ardelyx, Inc. was the largest of 4 companies reporting payments in 2025, $248.37 in all, mostly food and beverage. Lists Brooks-Tlc Hospital System, Inc and 4 other hospitals as hospital affiliations.
Overview
| NPI | 1790807410 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Apr 4, 2007 |
| Last updated in NPPES | Aug 19, 2015 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Nephrology Primary | 207RN0300X | 217755 | NY |
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 (NY) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 235 |
|---|---|
| Services billed | 1,275 across 22 procedure codes |
| Paid by Medicare | $112,748 |
Part D prescriptions in 2024
| Prescriptions (claims) | 2,127 · 5,014 30-day fills |
|---|---|
| Patients | 361 |
| Total drug cost | $593,859 |
| Generic share | 85% of claims |
Education and affiliations
| Graduation year | 1998 |
|---|---|
| Medicare specialty | Nephrology |
| Telehealth | Offers telehealth |
Medical group
- Nephrology Associates of Western New York, LLPAmherst, NY · 15 clinicians
Hospital affiliations
- Brooks-Tlc Hospital System, IncDunkirk, NY
- Kaleida HealthBuffalo, NY
- Kenmore Mercy HospitalKenmore, NY
- Mercy Hospital of BuffaloBuffalo, NY
- Sisters of Charity HospitalBuffalo, NY
Other facilities
- Davita Dunkirk DialysisDialysis facility · Dunkirk, NY
- Usrc Cheektowaga DialysisDialysis facility · Cheektowaga, NY
- Usrc HamburgDialysis facility · Blasdell, NY
- Usrc Williamsville DialysisDialysis facility · Williamsville, NY
Industry payments (Open Payments)
- 2025$248.37 · 19 payments from 4 companies
- 2024$226.96 · 23 payments from 4 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Ardelyx, Inc. | $118.50 | 4 |
| Travere Therapeutics, Inc. | $77.90 | 13 |
| Glaxosmithkline, LLC. | $33.63 | 1 |
| Amgen Inc. | $18.34 | 1 |
What the 2025 payments were for
- Food and Beverage$228.67 · 8 payments
- Education$19.70 · 11 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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