Will Tseng, M.D.
NPI 1013176213ActiveIndividual· Internal Medicine, Critical Care Medicine· San Jose, CA
Internal Medicine, Critical Care Medicine (M.D.) in San Jose, California, trained at Geisel School of Medicine at Dartmouth (class of 2007). Their prescriptions cost Medicare Part D more than their services did: $481,142 for 851 claims, against $214,091 paid for services in 2024. Glaxosmithkline, LLC. was the largest of 9 companies reporting payments in 2025, $782.51 in all, mostly food and beverage.
Overview
| NPI | 1013176213 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | Yes |
| NPI issued | Jun 3, 2008 |
| Last updated in NPPES | Aug 18, 2016 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Critical Care Medicine Primary | 207RC0200X | A105896 | CA |
| Internal Medicine | 207R00000X | A105896 | CA |
| Internal Medicine, Pulmonary Disease | 207RP1001X | A105896 | CA |
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 - Critical Care (Intensivists) (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 361 |
|---|---|
| Services billed | 3,333 across 29 procedure codes |
| Paid by Medicare | $214,091 |
Part D prescriptions in 2024
| Prescriptions (claims) | 851 · 1,149 30-day fills |
|---|---|
| Patients | 177 |
| Total drug cost | $481,142 |
| Generic share | 28% of claims |
Education and affiliations
| Medical school | Geisel School of Medicine at Dartmouth |
|---|---|
| Graduation year | 2007 |
| Medicare specialty | Critical Care (Intensivists) |
| Secondary specialties | Pulmonary Disease |
| Telehealth | Offers telehealth |
Medical group
- Sutter Bay Medical FoundationFremont, CA · 3,829 clinicians
Hospital affiliation
- El Camino HealthMountain View, CA
Industry payments (Open Payments)
- 2025$782.51 · 33 payments from 9 companies
- 2024$455.59 · 20 payments from 4 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Glaxosmithkline, LLC. | $223.38 | 11 |
| Astrazeneca Pharmaceuticals LP | $220.11 | 9 |
| Genzyme Corporation | $116.83 | 5 |
| Sanofi-Aventis U.S. LLC | $59.80 | 1 |
| Boehringer Ingelheim Pharmaceuticals, Inc. | $48.02 | 2 |
What the 2025 payments were for
- Food and Beverage$722.71 · 32 payments
- Education$59.80 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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