Tammy Vanderstelt
NPI 1588775365ActiveIndividual· Nurse Practitioner· Kalamazoo, MI
Nurse Practitioner with Ascension Medical Group Promed, practicing in Kalamazoo, Michigan. Their prescriptions cost Medicare Part D more than their services did: $1,082,910 for 12,124 claims, against $73,045 paid for services in 2024. Neurocrine Biosciences, Inc. was the largest of 2 companies reporting payments in 2025, $135.77 in all, mostly food and beverage. Lists Borgess Medical Center and 1 other hospital as hospital affiliations.
Overview
| NPI | 1588775365 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Sole proprietor | No |
| NPI issued | Aug 31, 2006 |
| Last updated in NPPES | Jul 8, 2007 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Nurse Practitioner Primary | 363L00000X | 4704196839 | 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 | 192 |
|---|---|
| Services billed | 1,090 across 12 procedure codes |
| Paid by Medicare | $73,045 |
Part D prescriptions in 2024
| Prescriptions (claims) | 12,124 · 12,148 30-day fills |
|---|---|
| Patients | 272 |
| Total drug cost | $1,082,910 |
| Generic share | 84% of claims |
Education and affiliations
| Graduation year | 2005 |
|---|---|
| Medicare specialty | Nurse Practitioner |
Medical group
- Ascension Medical Group PromedKalamazoo, MI · 262 clinicians
Hospital affiliations
- Borgess Medical CenterKalamazoo, MI
- Bronson Methodist HospitalKalamazoo, MI
Other facilities
- Centrica Care NavigatorsHospice · Kalamazoo, MI
Industry payments (Open Payments)
- 2025$135.77 · 2 payments from 2 companies
- 2024$24.37 · 1 payment from 1 company
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Neurocrine Biosciences, Inc. | $113.43 | 1 |
| Otsuka America Pharmaceutical, Inc. | $22.34 | 1 |
What the 2025 payments were for
- Food and Beverage$135.77 · 2 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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