Ryan Michael Mackenzie, NP
NPI 1891570453ActiveIndividual· Nurse Practitioner, Acute Care· Ann Arbor, MI
Nurse Practitioner, Acute Care (NP) with Associates in Neurology PC, practicing in Ann Arbor, Michigan. Their prescriptions cost Medicare Part D more than their services did: $78,758 for 200 claims, against $11,031 paid for services in 2024. Abbvie Inc. was the largest of 3 companies reporting payments in 2025, $80.73 in all, mostly food and beverage. Lists Ascension Providence Hospital, Southfield and Novi as a hospital affiliation.
Overview
| NPI | 1891570453 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | NP |
| Sole proprietor | No |
| NPI issued | Aug 30, 2023 |
| Last updated in NPPES | Apr 15, 2025 |
| Certified by provider | Apr 15, 2025 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Nurse Practitioner, Acute Care Primary | 363LA2100X | 4704268806 | MI |
| Nurse Practitioner | 363L00000X | 4704268806 | 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) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 88 |
|---|---|
| Services billed | 189 across 17 procedure codes |
| Paid by Medicare | $11,031 |
Part D prescriptions in 2024
| Prescriptions (claims) | 200 · 438 30-day fills |
|---|---|
| Patients | 47 |
| Total drug cost | $78,758 |
| Generic share | 68% of claims |
Education and affiliations
| Graduation year | 2023 |
|---|---|
| Medicare specialty | Nurse Practitioner |
Medical group
- Associates in Neurology PCHowell, MI · 13 clinicians
Hospital affiliation
- Ascension Providence Hospital, Southfield and NoviSouthfield, MI
Industry payments (Open Payments)
- 2025$80.73 · 5 payments from 3 companies
- 2024$38.50 · 2 payments from 1 company
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Abbvie Inc. | $47.28 | 3 |
| Astrazeneca Pharmaceuticals LP | $19.29 | 1 |
| Vanda Pharmaceuticals Inc. | $14.16 | 1 |
What the 2025 payments were for
- Food and Beverage$80.73 · 5 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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