Nelson Yoium-Tsiu Chang, MD
NPI 1689316648ActiveIndividual· Family Medicine· Tracy, CA
Family Medicine (MD) with Community Medical Centers, Inc., practicing in Tracy, California. Part D covered 58 prescriptions written in 2024, 78% of them generic. Kowa Pharmaceuticals America, Inc. reported $25.33 in payments in 2025, mostly food and beverage. Lists Sutter Tracy Community Hospital as a hospital affiliation.
Overview
| NPI | 1689316648 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Apr 11, 2022 |
| Last updated in NPPES | May 27, 2026 |
| Certified by provider | May 27, 2026 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Family Medicine Primary | 207Q00000X | A190393 | 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 - Family Practice (CA) |
|---|
Part D prescriptions in 2024
| Prescriptions (claims) | 58 · 60 30-day fills |
|---|---|
| Patients | 25 |
| Total drug cost | $8,546 |
| Generic share | 78% of claims |
Education and affiliations
| Graduation year | 2022 |
|---|---|
| Medicare specialty | Family Practice |
Medical group
- Community Medical Centers, Inc.Stockton, CA · 47 clinicians
Hospital affiliation
- Sutter Tracy Community HospitalTracy, CA
Industry payments (Open Payments)
- 2025$25.33 · 1 payment from 1 company
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Kowa Pharmaceuticals America, Inc. | $25.33 | 1 |
What the 2025 payments were for
- Food and Beverage$25.33 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 40 family medicine physicians in Tracy · All family medicine physicians in California