Peter S. Chang, MD
NPI 1205814811ActiveIndividual· Family Medicine· Battle Creek, MI
Family Medicine (MD) in Battle Creek, Michigan, trained at University of Kansas School of Med (Kc/Wich/Sal) (class of 1991). Their prescriptions cost Medicare Part D more than their services did: $128,121 for 1,600 claims, against $2,482 paid for services in 2024. Astellas Pharma US Inc reported $25.41 in payments in 2025, mostly food and beverage.
Overview
| NPI | 1205814811 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Jan 4, 2006 |
| Last updated in NPPES | Mar 20, 2026 |
| Certified by provider | Mar 20, 2026 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Family Medicine Primary | 207Q00000X | 4301063155 | MI |
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 (MI) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 157 |
|---|---|
| Services billed | 223 across 9 procedure codes |
| Paid by Medicare | $2,482 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,600 · 2,913 30-day fills |
|---|---|
| Patients | 169 |
| Total drug cost | $128,121 |
| Generic share | 79% of claims |
Education and affiliations
| Medical school | University of Kansas School of Med (Kc/Wich/Sal) |
|---|---|
| Graduation year | 1991 |
| Medicare specialty | Family Practice |
Medical group
- Grace Health IncBattle Creek, MI · 26 clinicians
Hospital affiliations
- Bronson Battle Creek HospitalBattle Creek, MI
- Bronson Methodist HospitalKalamazoo, MI
Industry payments (Open Payments)
- 2025$25.41 · 1 payment from 1 company
- 2024$67.51 · 3 payments from 1 company
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Astellas Pharma US Inc | $25.41 | 1 |
What the 2025 payments were for
- Food and Beverage$25.41 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 67 family medicine physicians in Battle Creek · All family medicine physicians in Michigan