Troy C. Thielen, PAC
NPI 1720445810ActiveIndividual· Physician Assistant· Okemos, MI
Physician Assistant (PAC) with Sparrow Eaton Hospital, practicing in Okemos, Michigan. Their prescriptions cost Medicare Part D more than their services did: $406,544 for 3,531 claims, against $1,108 paid for services in 2024. Novo Nordisk Inc was the largest of 19 companies reporting payments in 2025, $1,856 in all, mostly food and beverage. Lists Edward W Sparrow Hospital and 1 other hospital as hospital affiliations.
Overview
| NPI | 1720445810 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | PAC |
| Sole proprietor | No |
| NPI issued | Jan 21, 2016 |
| Last updated in NPPES | Jan 21, 2016 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Physician Assistant Primary | 363A00000X | 5601007643 | 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 - Physician Assistant (MI) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 15 |
|---|---|
| Services billed | 152 across 9 procedure codes |
| Paid by Medicare | $1,108 |
Part D prescriptions in 2024
| Prescriptions (claims) | 3,531 · 7,198 30-day fills |
|---|---|
| Patients | 618 |
| Total drug cost | $406,544 |
| Generic share | 86% of claims |
Education and affiliations
| Graduation year | 2015 |
|---|---|
| Medicare specialty | Physician Assistant |
Medical group
- Sparrow Eaton HospitalEaton Rapids, MI · 44 clinicians
Hospital affiliations
- Edward W Sparrow HospitalLansing, MI
- University of Michigan Health - Sparrow EatonCharlotte, MI
Industry payments (Open Payments)
- 2025$1,856 · 113 payments from 19 companies
- 2024$2,042 · 135 payments from 16 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Novo Nordisk Inc | $352.12 | 20 |
| Abbvie Inc. | $219.13 | 16 |
| Vanda Pharmaceuticals Inc. | $196.42 | 9 |
| Astrazeneca Pharmaceuticals LP | $173.43 | 15 |
| Otsuka America Pharmaceutical, Inc. | $166.50 | 7 |
What the 2025 payments were for
- Food and Beverage$1,856 · 113 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
Other physician assistants in Okemos
- 1073210035
- 1114193356
- 1114497930
- 1174012066
- 1255380796
- 1306522776
- 1639955412
- 1649864281
- 1730677238
- 1740412055
- 1770112120
- 1821684804
All 28 physician assistants in Okemos · All physician assistants in Michigan