Quick answers
- Which hospitals does William C. Dorion work at?
- Medicare's official clinician data lists William C. Dorion at 1 hospital: UMass Memorial Medical Center/University Campus. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does William C. Dorion see patients?
- Medicare's clinician data lists 3 practice locations, including Marlborough, MA, Stafford Springs, CT and Worcester, MA. Call before your visit to confirm the address.
- What is William C. Dorion's specialty?
- Medicare lists Nurse Practitioner as the primary specialty.
- Does William C. Dorion accept Medicare assignment?
- Yes. Medicare's clinician data says William C. Dorion 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 William C. Dorion?
- (508) 486-5521, as listed in official Medicare / NPI Registry data.
- What is William C. Dorion's NPI number?
- 1609403922. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where William C. Dorion works
Medicare's Facility Affiliation Data lists William C. Dorion at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- UMass Memorial Medical Center/University CampusWorcester, MA · Acute Care Hospital · CCN 220163
Practice locations
Addresses where William C. Dorion is enrolled with Medicare (CMS data updated 2026-10-02).
- 157 Union StMarlborough, MA 01752 (508) 486‑5521
- 201 Chestnut Hill RdStafford Springs, CT 06076 (860) 684‑4251
- 55 Lake Ave NWorcester, MA 01655 (508) 334‑1000
Group practices
Medicare enrollment lists William C. Dorion as a member of these groups (CMS data updated 2026-10-02).
- UMass Memorial Medical Group Inc2,516 clinicians in the group
- Cep America LLC1,023 clinicians in the group
Specialties
- Nurse Practitionerprimary
Other nurse practitioners in Marlborough
Clinicians with the same Medicare primary specialty in Marlborough, MA — not a recommendation.
Clinician information
| Medical school | Sioux City College Of Medicine |
|---|---|
| Graduation year | 2020 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1609403922 |
| 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