Quick answers
- Which hospitals does Aaron O'Brien work at?
- Medicare's official clinician data lists Aaron O'Brien at 4 hospitals: Central Vermont Medical Center, Porter Hospital Inc, The University of Vermont Health Network - Champl… and Univ. of Vermont - Fletcher Allen Health Care. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Aaron O'Brien see patients?
- Medicare's clinician data lists 1 practice location in Burlington, VT. Call before your visit to confirm the address.
- What is Aaron O'Brien's specialty?
- Medicare lists Internal Medicine as the primary specialty.
- Does Aaron O'Brien accept Medicare assignment?
- Yes. Medicare's clinician data says Aaron O'Brien accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of 2026-10-02. Ask the office to confirm before your visit.
- What is the phone number for Aaron O'Brien?
- (802) 847-0000, as listed in official Medicare / NPI Registry data.
- What is Aaron O'Brien's NPI number?
- 1023768157. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Aaron O'Brien works
Medicare's Facility Affiliation Data lists Aaron O'Brien at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Central Vermont Medical CenterBarre, VT · Acute Care Hospital · CCN 470001
- Porter Hospital IncMiddlebury, VT · Critical Access Hospital · CCN 471307
- The University of Vermont Health Network - Champl…Plattsburgh, NY · Acute Care Hospital · CCN 330250
- Univ. of Vermont - Fletcher Allen Health CareBurlington, VT · Acute Care Hospital · CCN 470003
Practice locations
Addresses where Aaron O'Brien is enrolled with Medicare (CMS data updated 2026-10-02).
- 111 Colchester AveBurlington, VT 05401 (802) 847‑0000
Group practices
Medicare enrollment lists Aaron O'Brien as a member of this group (CMS data updated 2026-10-02).
- University of Vermont Medical Center Inc1,208 clinicians in the group
Specialties
- Internal Medicineprimary
Other internal medicine doctors in Burlington
Clinicians with the same Medicare primary specialty in Burlington, VT — not a recommendation.
Clinician information
| Medical school | Ohio University, College Of Osteopathic Medicine |
|---|---|
| Graduation year | 2022 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1023768157 |
| Corrections | Report an error or suggest an update → |
Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.
Sources
- Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated 2026-10-02, retrieved 2026-10-29
- National Downloadable File (Doctors and Clinicians) — CMS, data updated 2026-10-02, retrieved 2026-10-29
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians