Sahityan Viswanathan, M.D.
NPI 1194251793ActiveIndividual· Internal Medicine, Nephrology· Las Vegas, NV
Internal Medicine, Nephrology (M.D.) with Nkdhc Rudnitsky PLLC, practicing in Las Vegas, Nevada. Their prescriptions cost Medicare Part D more than their services did: $397,781 for 913 claims, against $150,823 paid for services in 2024. Amgen Inc. was the largest of 18 companies reporting payments in 2025, $1,132 in all, mostly food and beverage. Lists Saint Rose Dominican Hospitals - Siena Campus and 3 other hospitals as hospital affiliations.
Overview
| NPI | 1194251793 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | May 3, 2017 |
| Last updated in NPPES | May 16, 2024 |
| Certified by provider | May 16, 2024 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Nephrology Primary | 207RN0300X | 22333 | NV |
| Student in an Organized Health Care Education/Training Program | 390200000X | BP20071809 | TX |
| Student in an Organized Health Care Education/Training Program | 390200000X | — | — |
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 (NV) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 399 |
|---|---|
| Services billed | 1,552 across 24 procedure codes |
| Paid by Medicare | $150,823 |
Part D prescriptions in 2024
| Prescriptions (claims) | 913 · 1,990 30-day fills |
|---|---|
| Patients | 206 |
| Total drug cost | $397,781 |
| Generic share | 82% of claims |
Education and affiliations
| Graduation year | 2014 |
|---|---|
| Medicare specialty | Nephrology |
| Secondary specialties | Internal Medicine |
| Telehealth | Offers telehealth |
Medical group
- Nkdhc Rudnitsky PLLCLas Vegas, NV · 44 clinicians
Hospital affiliations
- Saint Rose Dominican Hospitals - Siena CampusHenderson, NV
- Southern Hills Hospital and Medical CenterLas Vegas, NV
- Spring Valley Hospital Medical CenterLas Vegas, NV
- Sunrise Hospital and Medical CenterLas Vegas, NV
Other facilities
- 292513 South Pecos (Fmc)Dialysis facility · Las Vegas, NV
- 292519 Lake Mead North (Fmc)Dialysis facility · Las Vegas, NV
- Fkc Union VillageDialysis facility · Henderson, NV
Industry payments (Open Payments)
- 2025$1,132 · 38 payments from 18 companies
- 2024$905.05 · 33 payments from 14 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Amgen Inc. | $240.50 | 5 |
| Pfizer Inc. | $149.53 | 1 |
| Novartis Pharmaceuticals Corporation | $141.83 | 6 |
| Travere Therapeutics, Inc. | $94.44 | 3 |
| Bayer Healthcare Pharmaceuticals Inc. | $74.02 | 4 |
What the 2025 payments were for
- Food and Beverage$1,132 · 38 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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