Quick answers
- Which hospitals does William M. Vanneman Jr. work at?
- Medicare's official clinician data lists William M. Vanneman Jr. at 2 hospitals: Berkshire Medical Center and North Adams Regional Hospital Corporation. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does William M. Vanneman Jr. see patients?
- Medicare's clinician data lists 1 practice location in Pittsfield, MA. Call before your visit to confirm the address.
- What is William M. Vanneman Jr.'s specialty?
- Medicare lists Gastroenterology as the primary specialty, and also Internal Medicine.
- Does William M. Vanneman Jr. accept Medicare assignment?
- Yes. Medicare's clinician data says William M. Vanneman Jr. 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 M. Vanneman Jr.?
- (413) 447-2745, as listed in official Medicare / NPI Registry data.
- What is William M. Vanneman Jr.'s NPI number?
- 1124075718. 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 M. Vanneman Jr. works
Medicare's Facility Affiliation Data lists William M. Vanneman Jr. at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Berkshire Medical CenterPittsfield, MA · Acute Care Hospital · CCN 220046
- North Adams Regional Hospital CorporationNorth Adams, MA · Critical Access Hospital · CCN 221304
Practice locations
Addresses where William M. Vanneman Jr. is enrolled with Medicare (CMS data updated 2026-10-02).
- 777 N St, 201 Gastroenterology Services of BerkshirePittsfield, MA 01201 (413) 447‑2745
Group practices
Medicare enrollment lists William M. Vanneman Jr. as a member of this group (CMS data updated 2026-10-02).
- Berkshire Faculty Services Inc276 clinicians in the group
Specialties
- Gastroenterologyprimary
- Internal Medicinealso
Other gastroenterologists in Pittsfield
Clinicians with the same Medicare primary specialty in Pittsfield, MA — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Albany Medical College Of Union University |
| Graduation year | 1970 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1124075718 |
| 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