Marc B. Armstrong, M.D.
NPI 1326453556ActiveIndividual· Internal Medicine· Aberdeen, SD
Internal Medicine (M.D.) in Aberdeen, South Dakota, licensed in SD and FL, with an NPI issued in June 2014. 724 Medicare patients in 2024, $117,506 paid; nearly all of their 286 Part D prescriptions were generic (95%). Penumbra, Inc. reported $21.07 in payments in 2025, mostly food and beverage.
Overview
| NPI | 1326453556 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Jun 26, 2014 |
| Last updated in NPPES | Mar 17, 2018 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | 10781 | SD |
| Student in an Organized Health Care Education/Training Program | 390200000X | TRN16984 | FL |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Oct 9, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 10, 2026 | No match | — |
| New York OMIG · Nov 10, 2026 | No match | — |
| Ohio Medicaid · Nov 10, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 10, 2026 | No match | — |
| Washington HCA · Nov 10, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Emergency Medicine (FL); Practitioner - Internal Medicine (NM) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 724 |
|---|---|
| Services billed | 840 across 21 procedure codes |
| Paid by Medicare | $117,506 |
Part D prescriptions in 2024
| Prescriptions (claims) | 286 · 292 30-day fills |
|---|---|
| Patients | 204 |
| Total drug cost | $2,348 |
| Generic share | 95% of claims |
Industry payments (Open Payments)
- 2025$21.07 · 1 payment from 1 company
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Penumbra, Inc. | $21.07 | 1 |
What the 2025 payments were for
- Food and Beverage$21.07 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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