Jennifer J. Chang, M.D.
NPI 1831364991ActiveIndividual· Internal Medicine· Riverside, CA
Internal Medicine (M.D.) with Guam Memorial Hospital, practicing in Riverside, California. In 2024 Medicare paid $45,602 for 103 patients, and Part D covered 64 of their prescriptions, 38% of them generic. Xeris Pharmaceuticals, Inc. reported $24.91 in payments in 2025, mostly food and beverage. Lists Guam Memorial Hospital Authority as a hospital affiliation.
Overview
| NPI | 1831364991 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | Yes |
| NPI issued | Apr 29, 2008 |
| Last updated in NPPES | May 12, 2012 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | A106844 | CA |
| Internal Medicine | 207R00000X | 249583 | NY |
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 - Internal Medicine (CA); Practitioner - Internal Medicine (GU) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 103 |
|---|---|
| Services billed | 633 across 13 procedure codes |
| Paid by Medicare | $45,602 |
Part D prescriptions in 2024
| Prescriptions (claims) | 64 · 78 30-day fills |
|---|---|
| Total drug cost | $8,184 |
| Generic share | 38% of claims |
Education and affiliations
| Graduation year | 2005 |
|---|---|
| Medicare specialty | Internal Medicine |
Medical group
- Guam Memorial HospitalTamuning, GU · 131 clinicians
Hospital affiliation
- Guam Memorial Hospital AuthorityTamuning, GU
Industry payments (Open Payments)
- 2025$24.91 · 1 payment from 1 company
- 2024$188.65 · 2 payments from 2 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Xeris Pharmaceuticals, Inc. | $24.91 | 1 |
What the 2025 payments were for
- Food and Beverage$24.91 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
Other internal medicine physicians in Riverside
- 1003294661
- 1003494147
- 1003872169
- 1013536069
- 1033236237
- 1073711453
- 1083695456
- 1093866469
- 1104074814
- 1114458809
- 1124022108
- 1154305639
All 246 internal medicine physicians in Riverside · All internal medicine physicians in California