Viswam Siva Nair, MD
NPI 1336336460ActiveIndividual· Internal Medicine, Pulmonary Disease· Berkeley, CA
Internal Medicine, Pulmonary Disease (MD) with Sutter Bay Medical Foundation, practicing in Berkeley, California. Mostly services rather than prescriptions: Medicare paid $19,257 for 176 patients in 2024, with only 19 Part D claims. Astrazeneca Pharmaceuticals LP was the largest of 5 companies reporting payments in 2025, $287.08 in all, mostly food and beverage. Lists Alta Bates Summit Medical Center and 2 other hospitals as hospital affiliations.
Overview
| NPI | 1336336460 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Oct 2, 2007 |
| Last updated in NPPES | Sep 18, 2025 |
| Certified by provider | Sep 18, 2025 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Pulmonary Disease Primary | 207RP1001X | A93740 | CA |
| Internal Medicine, Pulmonary Disease | 207RP1001X | MD60959262 | WA |
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 - Pulmonary Disease (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 176 |
|---|---|
| Services billed | 480 across 26 procedure codes |
| Paid by Medicare | $19,257 |
Part D prescriptions in 2024
| Prescriptions (claims) | 19 · 19 30-day fills |
|---|---|
| Total drug cost | $2,995 |
Education and affiliations
| Graduation year | 2004 |
|---|---|
| Medicare specialty | Pulmonary Disease |
| Secondary specialties | Critical Care (Intensivists) |
| Telehealth | Offers telehealth |
Medical group
- Sutter Bay Medical FoundationFremont, CA · 3,829 clinicians
Hospital affiliations
- Alta Bates Summit Medical CenterOakland, CA
- Alta Bates Summit Medical Center - Alta Bates CampBerkeley, CA
- Eden Medical CenterCastro Valley, CA
Industry payments (Open Payments)
- 2025$287.08 · 9 payments from 5 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Astrazeneca Pharmaceuticals LP | $122.04 | 4 |
| Medtronic, Inc. | $64.84 | 1 |
| Glaxosmithkline, LLC. | $48.26 | 2 |
| Genzyme Corporation | $36.35 | 1 |
| Philips North America LLC | $15.59 | 1 |
What the 2025 payments were for
- Food and Beverage$287.08 · 9 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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