NPIMap

Individual provider Active NPI

Oliver John Preston Barnyak, MD

  • Emergency Medicine Physician
  • Randolph, VT
National Provider Identifier
1831693787
Registry record updated Nov 22, 2024
On this page

Key facts

NPPES NPI Registry
Primary specialty
Emergency Medicine PhysicianTaxonomy code 207P00000X
License
33916 Issued in NH
Practice address
44 S Main St
Randolph, VT 05060-1381
Phone
(802) 728-7000
NPI assigned
Mar 23, 2018
Last updated
Nov 22, 2024By the provider in NPPES
Sex
Male
Sole proprietor
No

NPPES NPI Registry

Updated by the provider on Nov 22, 2024

Registry information is reported by the provider to CMS and is not verified. About this source

Specialties & licenses 2

Specialty (taxonomy)CodeLicenseStatePrimary
Emergency Medicine Physician 207P00000X 042.0015341 VT
Emergency Medicine Physician 207P00000X 33916 NH Primary

Addresses

Primary practice location

44 S Main St
Randolph, VT 05060-1381

Mailing address

1 Medical Center Dr
Lebanon, NH 03756-1000

Other practice location 1

273 County Rd
New London, NH 03257-5736
Phone (603) 526-2911

Other practice location 2

1 Medical Center Dr
Lebanon, NH 03756-0001
Phone (603) 650-5000

Other practice location 3

10 Alice Peck Day Dr
Lebanon, NH 03766-2900
Phone (603) 448-3121

Medicare participation

Medicare enrollment files
Medicare fee-for-service enrollment
Enrolled in VT, NH2 enrollments
Eligible to order & refer
  • Part B services
  • Medical equipment
  • Home health
  • Power mobility devices
  • Hospice
Green means eligible to order or refer.

Enrollment records 2

Enrollment IDStateProvider typePAC IDDetails
I20210812003025 VT Practitioner - Emergency Medicine 2062769490 Reassigns benefits to 6 organizations
I20241203002987 NH Practitioner - Emergency Medicine 2062769490 Reassigns benefits to 6 organizations

Care Compare profile

Medicare Care Compare
Specialty
Emergency Medicine
Education
Geisel School of Medicine at Dartmouth, 2018
Medicare assignment
Accepts the Medicare-approved amount as payment in full
Group practices
Dartmouth-Hitchcock ClinicGroup PAC ID 4183537509, 1,445 clinicians
Windsor Hospital CorporationGroup PAC ID 2860387214, shared by 6 NPIs, 56 clinicians
Gifford Medical Center IncGroup PAC ID 4880683663, shared by 3 NPIs, 55 clinicians

Practice addresses (Care Compare)

1 Medical Ctr Dr
Lebanon, NH 03756-1000
Phone (603) 650-5000

289 County Rd
Windsor, VT 05089-9000

44 S Main St
Randolph, VT 05060-1381
Phone (802) 728-7000

Hospital & facility affiliations

National Provider Directory

National Provider Directory
Medicare enrollment (NPD)
Enrolled
Credentials
Doctor of Medicine

Practice roles

OrganizationSpecialtyStatusNew patients
Alice Peck Day Memorial Hospital CurrentSince Oct 31, 2025 Accepting new patients
Gifford Medical Center Inc CurrentSince Aug 17, 2021 Accepting new patients
Mary Hitchcock Memorial Hospital Current Accepting new patients
Alice Peck Day Memorial Hospital Current Accepting new patients
Dartmouth-Hitchcock Clinic CurrentSince Dec 3, 2024 Accepting new patients
Southwestern Vermont Medical Center Inc. CurrentSince Sep 7, 2021 Accepting new patients
Dartmouth-Hitchcock Clinic Emergency Medicine CurrentSince Dec 3, 2024 Accepting new patients
Windsor Hospital Corporation Emergency Medicine CurrentSince Oct 1, 2025 Accepting new patients
Mary Hitchcock Memorial Hospital CurrentSince Dec 3, 2024 Accepting new patients
The New London Hospital Association, Inc. CurrentSince Nov 19, 2024 Accepting new patients
Windsor Hospital Corporation CurrentSince Oct 1, 2025 Accepting new patients
Mary Hitchcock Memorial Hospital CurrentSince Dec 3, 2024 Accepting new patients
Gifford Medical Center Inc CurrentSince Feb 1, 2026 Accepting new patients
The New London Hospital Association, Inc. CurrentSince Nov 19, 2024 Accepting new patients
Windsor Hospital Corporation CurrentSince Oct 1, 2025 Accepting new patients
Windsor Hospital Corporation CurrentSince Oct 1, 2025 Accepting new patients
Alice Peck Day Memorial Hospital CurrentSince Dec 3, 2024 Accepting new patients
Gifford Medical Center Inc. CurrentSince Aug 17, 2021 Accepting new patients
Alice Peck Day Memorial Hospital CurrentSince Dec 3, 2024 Accepting new patients
The New London Hospital Association, Inc. Past Accepting new patients

Locations

1 Medical Dr
Lebanon, NH 03756
Phone (603) 650-5922

10 Alice Peck Day Dr
Lebanon, NH 03766
Phone (603) 448-7440

5 Alice Peck Day Dr
Lebanon, NH 03766
Phone (603) 448-3996

273 County Rd
New London, NH 03257
Phone (603) 526-5215

100 Hospital Dr
Bennington, VT 05201
Phone (802) 447-4509

120 Hospital Dr
Bennington, VT 05201
Phone (802) 440-4077

44 S Main St
Randolph, VT 05060
Phone (802) 728-4441

289 County Rd
Windsor, VT 05089
Phone (802) 674-7220

Interoperability endpoints

  • FHIR API: https://edhwebportal.hitchcock.org/FHIRProxy/api/FHIR/R4/
  • Direct secure messaging: obarnyak174846@direct.dartmouth-hitchcock.org

Organizations & group practices 20

Organizations this provider is connected to: Medicare benefit reassignments (the organization bills Medicare for this provider’s services), Care Compare group memberships, National Provider Directory roles and organizations whose NPPES authorized official is this provider.

View all 20

Hospital & facility affiliations 12

Hospitals and other facilities this clinician is affiliated with according to Medicare Care Compare.

NPI Registry JSON

The complete NPPES record for this NPI in the NPI Registry API format.

{
    "created_epoch": "1521763200000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1732233600000",
    "number": "1831693787",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "1 MEDICAL CENTER DR",
            "city": "LEBANON",
            "state": "NH",
            "postal_code": "037561000"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "44 S MAIN ST",
            "city": "RANDOLPH",
            "state": "VT",
            "postal_code": "050601381",
            "telephone_number": "802-728-7000"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "273 County Rd",
            "address_purpose": "LOCATION",
            "city": "New London",
            "state": "NH",
            "postal_code": "032575736",
            "country_code": "US",
            "telephone_number": "603-526-2911",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "address_1": "1 Medical Center Dr",
            "address_purpose": "LOCATION",
            "city": "Lebanon",
            "state": "NH",
            "postal_code": "037560001",
            "country_code": "US",
            "telephone_number": "603-650-5000",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "address_1": "10 Alice Peck Day Dr",
            "address_purpose": "LOCATION",
            "city": "Lebanon",
            "state": "NH",
            "postal_code": "037662900",
            "country_code": "US",
            "telephone_number": "603-448-3121",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "BARNYAK",
        "first_name": "OLIVER",
        "middle_name": "JOHN PRESTON",
        "credential": "MD",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2018-03-23",
        "last_updated": "2024-11-22",
        "certification_date": "2024-11-22",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207P00000X",
            "taxonomy_group": "",
            "desc": "Emergency Medicine",
            "state": "VT",
            "license": "042.0015341",
            "primary": false
        },
        {
            "code": "207P00000X",
            "taxonomy_group": "",
            "desc": "Emergency Medicine",
            "state": "NH",
            "license": "33916",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

Other providers in Randolph, VT

Sources for this page

Verify at the official NPI Registry.