Sankar Narayan Niranjan, MD
NPI 1497752802ActiveIndividual· Internal Medicine, Nephrology· Stanford, CA
Internal Medicine, Nephrology (MD) with Stanford Health Care, practicing in Stanford, California. Their prescriptions cost Medicare Part D more than their services did: $98,316 for 639 claims, against $18,499 paid for services in 2024. Idorsia Pharmaceuticals US Inc reported $122.00 in payments in 2025, mostly food and beverage. Lists Stanford Health Care and 1 other hospital as hospital affiliations.
Overview
| NPI | 1497752802 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Jun 30, 2005 |
| Last updated in NPPES | Mar 27, 2025 |
| Certified by provider | Mar 27, 2025 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Nephrology Primary | 207RN0300X | C196910 | CA |
| Internal Medicine | 207R00000X | C196910 | CA |
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 (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 127 |
|---|---|
| Services billed | 186 across 6 procedure codes |
| Paid by Medicare | $18,499 |
Part D prescriptions in 2024
| Prescriptions (claims) | 639 · 1,311 30-day fills |
|---|---|
| Patients | 132 |
| Total drug cost | $98,316 |
| Generic share | 77% of claims |
Education and affiliations
| Graduation year | 1994 |
|---|---|
| Medicare specialty | Nephrology |
| Secondary specialties | Internal Medicine |
| Telehealth | Offers telehealth |
Medical group
- Stanford Health CareStanford, CA · 3,122 clinicians
Hospital affiliations
- Stanford Health CareStanford, CA
- Stanford Health Care Tri-ValleyPleasanton, CA
Industry payments (Open Payments)
- 2025$122.00 · 2 payments from 1 company
- 2024$444.24 · 12 payments from 6 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Idorsia Pharmaceuticals US Inc | $122.00 | 2 |
What the 2025 payments were for
- Food and Beverage$122.00 · 2 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
Other nephrologists in Stanford
- 1104117407
- 1154579969
- 1316408479
- 1356505317
- 1356755532
- 1407823875
- 1437166592
- 1437338951
- 1538600952
- 1548604853
- 1558656231
- 1730118738
All 41 nephrologists in Stanford · All nephrologists in California