Cecilia Thien Thu Si Nguyen, MD
NPI 1548753296ActiveIndividual· Hospitalist· Royal Oak, MI
Hospitalist (MD) with Emergency Medicine Associates P.A., P.C., practicing in Royal Oak, Michigan. In 2024 Medicare paid $61,596 for 271 patients, and Part D covered 317 of their prescriptions, 80% of them generic. Genzyme Corporation was the largest of 4 companies reporting payments in 2025, $556.59 in all, mostly food and beverage. Lists Inova Alexandria Hospital and 2 other hospitals as hospital affiliations.
Overview
| NPI | 1548753296 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Jun 7, 2018 |
| Last updated in NPPES | Mar 14, 2023 |
| Certified by provider | Mar 14, 2023 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Hospitalist Primary | 208M00000X | 4301504876 | MI |
| Internal Medicine | 207R00000X | MT215927 | PA |
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 (DC) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 271 |
|---|---|
| Services billed | 647 across 11 procedure codes |
| Paid by Medicare | $61,596 |
Part D prescriptions in 2024
| Prescriptions (claims) | 317 · 398 30-day fills |
|---|---|
| Patients | 120 |
| Total drug cost | $35,796 |
| Generic share | 80% of claims |
Education and affiliations
| Graduation year | 2017 |
|---|---|
| Medicare specialty | Internal Medicine |
Medical group
- Emergency Medicine Associates P.A., P.C.Newport News, VA · 714 clinicians
Hospital affiliations
- Inova Alexandria HospitalAlexandria, VA
- Inova Fairfax HospitalFalls Church, VA
- Inova Mount Vernon HospitalAlexandria, VA
Industry payments (Open Payments)
- 2025$556.59 · 6 payments from 4 companies
- 2024$819.40 · 8 payments from 5 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Genzyme Corporation | $268.52 | 2 |
| Astrazeneca Pharmaceuticals LP | $117.69 | 1 |
| Pfizer Inc. | $99.20 | 1 |
| Mentor Worldwide LLC | $71.18 | 2 |
What the 2025 payments were for
- Food and Beverage$556.59 · 6 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 25 hospitalists in Royal Oak · All hospitalists in Michigan