Quick answers
- Which hospitals does Peter Westervelt work at?
- Medicare's official clinician data lists Peter Westervelt at 5 hospitals: Barnes Jewish Hospital, MaineHealth Maine Medical Center, MaineHealth Mid Coast Hospital, Massachusetts General Hospital and Memorial Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Peter Westervelt see patients?
- Medicare's clinician data lists 2 practice locations, including Brunswick, ME and Boston, MA. Call before your visit to confirm the address.
- What is Peter Westervelt's specialty?
- Medicare lists Medical Oncology as the primary specialty.
- Does Peter Westervelt accept Medicare assignment?
- Yes. Medicare's clinician data says Peter Westervelt 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 Peter Westervelt?
- (207) 373-2266, as listed in official Medicare / NPI Registry data.
- What is Peter Westervelt's NPI number?
- 1043292246. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Peter Westervelt works
Medicare's Facility Affiliation Data lists Peter Westervelt at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Barnes Jewish HospitalSaint Louis, MO · Acute Care Hospital · CCN 260032
- MaineHealth Maine Medical CenterPortland, ME · Acute Care Hospital · CCN 200009
- MaineHealth Mid Coast HospitalBrunswick, ME · Acute Care Hospital · CCN 200021
- Massachusetts General HospitalBoston, MA · Acute Care Hospital · CCN 220071
- Memorial HospitalBelleville, IL · Acute Care Hospital · CCN 140185
Practice locations
Addresses where Peter Westervelt is enrolled with Medicare (CMS data updated 2026-10-02).
- 329 Maine StBrunswick, ME 04011 (207) 373‑2266
- 55 Fruit StBoston, MA 02114 (617) 724‑0287
Group practices
Medicare enrollment lists Peter Westervelt as a member of these groups (CMS data updated 2026-10-02).
- Massachusetts General Physicians Organization Inc3,558 clinicians in the group
- MaineHealth2,633 clinicians in the group
Specialties
- Medical Oncologyprimary
Other oncologists in Maine
Clinicians with the same Medicare primary specialty in Maine — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Washington University School Of Medicine |
| Graduation year | 1992 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1043292246 |
| 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