Jennifer S. Chang, DO
NPI 1083829485ActiveIndividual· Emergency Medicine· Oakland, CA
Emergency Medicine (DO) in Oakland, California, trained at Philadelphia College of Osteopathic Medicine (class of 2005). 59 Medicare patients in 2024, $7,397 paid; nearly all of their 129 Part D prescriptions were generic (91%). Tempus Ai, Inc reported $13.50 in payments in 2025, mostly food and beverage.
Overview
| NPI | 1083829485 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | DO |
| Sole proprietor | No |
| NPI issued | May 11, 2007 |
| Last updated in NPPES | Dec 13, 2021 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Emergency Medicine Primary | 207P00000X | 20A10695 | 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 - Emergency Medicine (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 59 |
|---|---|
| Services billed | 64 across 12 procedure codes |
| Paid by Medicare | $7,397 |
Part D prescriptions in 2024
| Prescriptions (claims) | 129 · 136 30-day fills |
|---|---|
| Patients | 93 |
| Total drug cost | $2,583 |
| Generic share | 91% of claims |
Education and affiliations
| Medical school | Philadelphia College of Osteopathic Medicine |
|---|---|
| Graduation year | 2005 |
| Medicare specialty | Emergency Medicine |
Medical group
- Permanente Medical Group IncOakland, CA · 10,996 clinicians
Hospital affiliation
Industry payments (Open Payments)
- 2025$13.50 · 1 payment from 1 company
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Tempus Ai, Inc | $13.50 | 1 |
What the 2025 payments were for
- Food and Beverage$13.50 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 255 emergency medicine physicians in Oakland · All emergency medicine physicians in California