Jeremy Chang, MD
NPI 1679004691ActiveIndividual· Obstetrics & Gynecology· Mission Viejo, CA
Obstetrics & Gynecology (MD) in Mission Viejo, California, trained at Tufts University School of Medicine (class of 2017). Mostly services rather than prescriptions: Medicare paid $2,963 for 18 patients in 2024, with only 41 Part D claims. Biogen, Inc. was the largest of 14 companies reporting payments in 2025, $567.82 in all, mostly food and beverage.
Overview
| NPI | 1679004691 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Mar 22, 2017 |
| Last updated in NPPES | Jul 11, 2024 |
| Certified by provider | Jul 11, 2024 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Obstetrics & Gynecology Primary | 207V00000X | A159443 | 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 - Obstetrics/Gynecology (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 18 |
|---|---|
| Services billed | 33 across 9 procedure codes |
| Paid by Medicare | $2,963 |
Part D prescriptions in 2024
| Prescriptions (claims) | 41 · 94 30-day fills |
|---|---|
| Patients | 23 |
| Total drug cost | $2,186 |
| Generic share | 85% of claims |
Education and affiliations
| Medical school | Tufts University School of Medicine |
|---|---|
| Graduation year | 2017 |
| Medicare specialty | Obstetrics/Gynecology |
Medical group
- Providence Medical FoundationVictorville, CA · 1,466 clinicians
Hospital affiliation
- Providence Mission HospitalMission Viejo, CA
Industry payments (Open Payments)
- 2025$567.82 · 26 payments from 14 companies
- 2024$105.69 · 5 payments from 3 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Biogen, Inc. | $180.48 | 8 |
| Exact Sciences Corporation | $58.64 | 2 |
| Astellas Pharma US Inc | $51.71 | 2 |
| Mayne Pharma Commercial LLC | $49.06 | 3 |
| Bayer Healthcare Pharmaceuticals Inc. | $42.69 | 2 |
What the 2025 payments were for
- Food and Beverage$567.82 · 26 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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