NPIMap

Individual provider Active NPI

Aaron O'Brien, DO

  • Internal Medicine Physician
  • Burlington, VT
National Provider Identifier
1023768157
Registry record updated Aug 21, 2025
On this page

Key facts

NPPES NPI Registry
Primary specialty
Internal Medicine PhysicianTaxonomy code 207R00000X
License
032.0134256 Issued in VT
Practice address
111 Colchester Ave
Burlington, VT 05401-1473
Phone
(802) 847-2345
NPI assigned
Mar 23, 2022
Sex
Male
Sole proprietor
No

NPPES NPI Registry

Updated by the provider on Aug 21, 2025

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

Specialties & licenses 2

Specialty (taxonomy)CodeLicenseStatePrimary
Student in an Organized Health Care Education/Training Program 390200000X
Internal Medicine Physician 207R00000X 032.0134256 VT Primary

Addresses

Primary practice location

111 Colchester Ave
Burlington, VT 05401-1473

Mailing address

111 Colchester Ave
Burlington, VT 05401-1473
Phone (419) 601-4281

Medicare participation

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

Enrollment records 1

Enrollment IDStateProvider typePAC IDDetails
I20250814001927 VT Practitioner - Internal Medicine 0547648792 Reassigns benefits to 1 organization

Care Compare profile

Medicare Care Compare
Specialty
Internal Medicine
Education
Ohio University, College of Osteopathic Medicine, 2022
Medicare assignment
Accepts the Medicare-approved amount as payment in full
Group practices
University of Vermont Medical Center IncGroup PAC ID 3779491071, 1,208 clinicians

Practice addresses (Care Compare)

111 Colchester Ave
Burlington, VT 05401-1473
Phone (802) 847-0000

Hospital & facility affiliations

  • Univ. of Vermont - Fletcher Allen Health Care Hospital, Burlington, VT, CCN 470003
  • The University of Vermont Health Network - Champl Hospital, Plattsburgh, NY, CCN 330250
  • Central Vermont Medical Center Hospital, Barre, VT, CCN 470001
  • Porter Hospital Inc Hospital, Middlebury, VT, CCN 471307

National Provider Directory

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

State licenses

LicenseStateTypeSpecialty
032.0134256VTMDInternal Medicine Physician

Practice roles

OrganizationSpecialtyStatusNew patients
University of Vermont Medical Center Inc Internal Medicine CurrentSince Sep 2, 2025 Accepting new patients
University of Vermont Medical Center Inc Past Accepting new patients

Locations

111 Colchester Ave
Burlington, VT 05401
Phone (802) 656-2415

1 S Prospect St
Burlington, VT 05401
Phone (802) 847-4531

Interoperability endpoints

  • Direct secure messaging: aobrien484031@direct.uvmhealth.org

Organizations & group practices 2

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

Hospital & facility affiliations 20

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

View all 20

NPI Registry JSON

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

{
    "created_epoch": "1647993600000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1755734400000",
    "number": "1023768157",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "111 COLCHESTER AVE",
            "city": "BURLINGTON",
            "state": "VT",
            "postal_code": "054011473",
            "telephone_number": "419-601-4281"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "111 COLCHESTER AVE",
            "city": "BURLINGTON",
            "state": "VT",
            "postal_code": "054011473",
            "telephone_number": "802-847-2345"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "O'BRIEN",
        "first_name": "AARON",
        "name_prefix": "Dr.",
        "credential": "DO",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2022-03-23",
        "last_updated": "2025-08-21",
        "certification_date": "2025-08-21",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "390200000X",
            "taxonomy_group": "",
            "desc": "Student in an Organized Health Care Education/Training Program",
            "state": null,
            "license": null,
            "primary": false
        },
        {
            "code": "207R00000X",
            "taxonomy_group": "",
            "desc": "Internal Medicine",
            "state": "VT",
            "license": "032.0134256",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

Other providers in Burlington, VT

Sources for this page

Verify at the official NPI Registry.