Mary Christine Marshall, M.D.
NPI 1245320589ActiveIndividual· Family Medicine· Grand Blanc, MI
Family Medicine (M.D.) in Grand Blanc, Michigan, trained at Michigan State University College of Human Medicine (class of 1997). Their prescriptions cost Medicare Part D more than their services did: $471,017 for 4,002 claims, against $31,004 paid for services in 2024. Exact Sciences Corporation was the largest of 2 companies reporting payments in 2025, $37.28 in all, mostly food and beverage.
Overview
| NPI | 1245320589 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Oct 16, 2006 |
| Last updated in NPPES | Aug 10, 2011 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Family Medicine Primary | 207Q00000X | MM070680 | 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 | 100 |
|---|---|
| Services billed | 558 across 45 procedure codes |
| Paid by Medicare | $31,004 |
Part D prescriptions in 2024
| Prescriptions (claims) | 4,002 · 9,049 30-day fills |
|---|---|
| Patients | 256 |
| Total drug cost | $471,017 |
| Generic share | 83% of claims |
Education and affiliations
| Medical school | Michigan State University College of Human Medicine |
|---|---|
| Graduation year | 1997 |
| Medicare specialty | Family Practice |
Hospital affiliation
- Ascension Genesys HospitalGrand Blanc, MI
Other facilities
- Absolute Home Health CareHome health agency · Grand Blanc, MI
Industry payments (Open Payments)
- 2025$37.28 · 2 payments from 2 companies
- 2024$17.14 · 1 payment from 1 company
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Exact Sciences Corporation | $20.84 | 1 |
| Novo Nordisk Inc | $16.44 | 1 |
What the 2025 payments were for
- Food and Beverage$37.28 · 2 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 118 family medicine physicians in Grand Blanc · All family medicine physicians in Michigan