Guillermo Rafael Ethier, DNP
NPI 1154012433ActiveIndividual· Nurse Practitioner· Royal Oak, MI
Nurse Practitioner (DNP) in Royal Oak, Michigan, trained at University of Michigan Medical School (class of 2023). Part D covered 320 prescriptions written in 2024, 71% of them generic. Gilead Sciences, Inc. was the largest of 9 companies reporting payments in 2025, $3,117 in all, mostly food and beverage.
Overview
| NPI | 1154012433 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | DNP |
| Sole proprietor | Yes |
| NPI issued | May 17, 2023 |
| Last updated in NPPES | May 17, 2023 |
| Certified by provider | May 17, 2023 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Nurse Practitioner Primary | 363L00000X | 4704371357 | 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 - Nurse Practitioner (MI) |
|---|
Part D prescriptions in 2024
| Prescriptions (claims) | 320 · 455 30-day fills |
|---|---|
| Patients | 58 |
| Total drug cost | $294,134 |
| Generic share | 71% of claims |
Education and affiliations
| Medical school | University of Michigan Medical School |
|---|---|
| Graduation year | 2023 |
| Medicare specialty | Nurse Practitioner |
Medical group
- Downriver Mental Health Clinic PCGrand Rapids, MI · 299 clinicians
Industry payments (Open Payments)
- 2025$3,117 · 99 payments from 9 companies
- 2024$1,251 · 75 payments from 8 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Gilead Sciences, Inc. | $2,097 | 39 |
| Viiv Healthcare Company | $536.27 | 32 |
| Iti, Inc. (D/B/A Intra-Cellular Therapies, Inc.) | $140.93 | 13 |
| Merck Sharp & Dohme LLC | $86.14 | 3 |
| Otsuka America Pharmaceutical, Inc. | $81.63 | 4 |
What the 2025 payments were for
- Food and Beverage$1,962 · 91 payments
- Travel and Lodging$1,155 · 8 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
Other nurse practitioners in Royal Oak
- 1114398179
- 1225412448
- 1235642919
- 1255847661
- 1285483669
- 1306326848
- 1366994816
- 1386721397
- 1407867799
- 1457602427
- 1508423393
- 1548706807
All 153 nurse practitioners in Royal Oak · All nurse practitioners in Michigan