Grant Matthew Wiswell, MD, DDS
NPI 1497917132ActiveIndividual· Dentist· Missoula, MT
Opted out of Medicare from October 2018 to October 2028. Dentist (MD, DDS) in Missoula, Montana, licensed in MT, with an NPI issued in June 2008. Part D covered 1,795 prescriptions written in 2024, 100% of them generic. Straumann USA LLC reported $568.45 in payments in 2025, mostly speaking and faculty fees.
Overview
| NPI | 1497917132 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD, DDS |
| Sole proprietor | Yes |
| NPI issued | Jun 25, 2008 |
| Last updated in NPPES | Oct 7, 2025 |
| Certified by provider | Oct 7, 2025 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Dentist Primary | 122300000X | 2433 | MT |
| Oral & Maxillofacial Surgery | 204E00000X | 12707 | MT |
| Dentist, Oral and Maxillofacial Surgery | 1223S0112X | 2433 | MT |
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) | Not in the public enrollment file of Oct 1, 2026 |
|---|---|
| Opt-out | Opted out Oct 8, 2018 – Oct 8, 2028 |
| Can order and refer | Yes |
During an opt-out period the provider sees Medicare patients only under private contracts, and Medicare does not pay claims for their services.
Part D prescriptions in 2024
| Prescriptions (claims) | 1,795 · 1,804 30-day fills |
|---|---|
| Patients | 436 |
| Total drug cost | $9,588 |
| Generic share | 100% of claims |
Industry payments (Open Payments)
- 2025$568.45 · 3 payments from 1 company
- 2024$128.06 · 3 payments from 1 company
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Straumann USA LLC | $568.45 | 3 |
What the 2025 payments were for
- Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program$518.30 · 1 payment
- Food and Beverage$50.15 · 2 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
Other dentists in Missoula
- 1104264647
- 1255690939
- 1326291741
- 1639205404
- 1700072113
- 1801237920
- 1851672182
- 1922004316
- 1942791454
- 1972798825
- 1972934040
- 1982907689