Oliver John Preston Barnyak, MD
NPI 1831693787ActiveIndividual· Emergency Medicine· Randolph, VT
Emergency Medicine (MD) in Randolph, Vermont, trained at Geisel School of Medicine at Dartmouth (class of 2018). 39 Medicare patients in 2024, $3,988 paid; nearly all of their 108 Part D prescriptions were generic (93%).
Overview
| NPI | 1831693787 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Mar 23, 2018 |
| Last updated in NPPES | Nov 22, 2024 |
| Certified by provider | Nov 22, 2024 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Emergency Medicine Primary | 207P00000X | 33916 | NH |
| Emergency Medicine | 207P00000X | 042.0015341 | VT |
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 - Emergency Medicine (NH); Practitioner - Emergency Medicine (VT) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 39 |
|---|---|
| Services billed | 49 across 17 procedure codes |
| Paid by Medicare | $3,988 |
Part D prescriptions in 2024
| Prescriptions (claims) | 108 · 110 30-day fills |
|---|---|
| Patients | 86 |
| Total drug cost | $2,049 |
| Generic share | 93% of claims |
Education and affiliations
| Medical school | Geisel School of Medicine at Dartmouth |
|---|---|
| Graduation year | 2018 |
| Medicare specialty | Emergency Medicine |
Medical groups
- Dartmouth-Hitchcock ClinicLebanon, NH · 1,472 clinicians
- Windsor Hospital CorporationWindsor, VT · 61 clinicians
- Gifford Medical Center IncRandolph, VT · 56 clinicians
Hospital affiliations
- Gifford Medical CenterRandolph, VT
- Mary Hitchcock Memorial HospitalLebanon, NH
- Mt Ascutney HospitalWindsor, VT
Industry payments (Open Payments)
None reported for 2025 or 2024.
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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