William K.Y. Chen, M.D.
NPI 1982744942ActiveIndividual· Internal Medicine, Gastroenterology· Roseville, CA
Internal Medicine, Gastroenterology (M.D.) with Sutter Valley Medical Foundation, practicing in Roseville, California. Mostly services rather than prescriptions: Medicare paid $108,569 for 366 patients in 2024, with only 17 Part D claims. Boston Scientific Corporation was the largest of 2 companies reporting payments in 2025, $72.04 in all, mostly food and beverage. Lists Sutter Amador Hospital and 1 other hospital as hospital affiliations.
Overview
| NPI | 1982744942 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Feb 7, 2007 |
| Last updated in NPPES | Apr 16, 2020 |
| Certified by provider | Apr 16, 2020 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Gastroenterology Primary | 207RG0100X | G57578 | 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 - Gastroenterology (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 366 |
|---|---|
| Services billed | 1,095 across 41 procedure codes |
| Paid by Medicare | $108,569 |
Part D prescriptions in 2024
| Prescriptions (claims) | 17 · 26 30-day fills |
|---|---|
| Total drug cost | $4,271 |
Education and affiliations
| Graduation year | 1983 |
|---|---|
| Medicare specialty | Gastroenterology |
Medical group
- Sutter Valley Medical FoundationModesto, CA · 2,500 clinicians
Hospital affiliations
- Sutter Amador HospitalJackson, CA
- Sutter Roseville Medical CenterRoseville, CA
Industry payments (Open Payments)
- 2025$72.04 · 3 payments from 2 companies
- 2024$18.56 · 1 payment from 1 company
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Boston Scientific Corporation | $57.01 | 2 |
| Novo Nordisk Inc | $15.03 | 1 |
What the 2025 payments were for
- Food and Beverage$72.04 · 3 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 16 gastroenterologists in Roseville · All gastroenterologists in California