Tammy S. Mackiewicz, ARNP
NPI 1790054252ActiveIndividual· Nurse Practitioner· Spring Hill, FL
Nurse Practitioner (ARNP) with Florida Cancer Specialists and Research Institute, LLC, practicing in Spring Hill, Florida. Part D covered 224 prescriptions written in 2024, 91% of them generic. Novartis Pharmaceuticals Corporation was the largest of 30 companies reporting payments in 2025, $2,407 in all, mostly food and beverage.
Overview
| NPI | 1790054252 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | ARNP |
| Sole proprietor | No |
| NPI issued | Dec 29, 2011 |
| Last updated in NPPES | Jul 14, 2015 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Nurse Practitioner Primary | 363L00000X | ARNP3356632 | FL |
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 (FL) |
|---|
Part D prescriptions in 2024
| Prescriptions (claims) | 224 · 310 30-day fills |
|---|---|
| Patients | 98 |
| Total drug cost | $52,763 |
| Generic share | 91% of claims |
Education and affiliations
| Graduation year | 2011 |
|---|---|
| Medicare specialty | Nurse Practitioner |
Medical group
- Florida Cancer Specialists and Research Institute, LLCNorth Port, FL · 498 clinicians
Industry payments (Open Payments)
- 2025$2,407 · 107 payments from 30 companies
- 2024$2,627 · 118 payments from 28 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Novartis Pharmaceuticals Corporation | $249.71 | 16 |
| Pfizer Inc. | $174.28 | 9 |
| E.R. Squibb & Sons, L.L.C. | $153.79 | 8 |
| Janssen Biotech, Inc. | $152.95 | 7 |
| Astellas Pharma US Inc | $141.73 | 7 |
What the 2025 payments were for
- Food and Beverage$2,329 · 106 payments
- Education$77.99 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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