Quick answers
- Which hospitals does Douglas B. Oneill work at?
- Medicare's official clinician data lists Douglas B. Oneill at 5 hospitals: Baystate Medical Center, Berkshire Medical Center, Fairview Hospital, North Adams Regional Hospital Corporation and Southwestern Vermont Medical Center. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Douglas B. Oneill see patients?
- Medicare's clinician data lists 2 practice locations, including Williamstown, MA and North Adams, MA. Call before your visit to confirm the address.
- What is Douglas B. Oneill's specialty?
- Medicare lists Internal Medicine as the primary specialty.
- Does Douglas B. Oneill accept Medicare assignment?
- Yes. Medicare's clinician data says Douglas B. Oneill 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.
- Does Douglas B. Oneill offer telehealth?
- Medicare's clinician data says Douglas B. Oneill offers telehealth services. Ask the office which visits can be done by video or phone.
- What is the phone number for Douglas B. Oneill?
- (413) 458-3140, as listed in official Medicare / NPI Registry data.
- What is Douglas B. Oneill's NPI number?
- 1003893082. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Douglas B. Oneill works
Medicare's Facility Affiliation Data lists Douglas B. Oneill at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Baystate Medical CenterSpringfield, MA · Acute Care Hospital · CCN 220077
- Berkshire Medical CenterPittsfield, MA · Acute Care Hospital · CCN 220046
- Fairview HospitalGreat Barrington, MA · Critical Access Hospital · CCN 221302
- North Adams Regional Hospital CorporationNorth Adams, MA · Critical Access Hospital · CCN 221304
- Southwestern Vermont Medical CenterBennington, VT · Acute Care Hospital · CCN 470012
Practice locations
Addresses where Douglas B. Oneill is enrolled with Medicare (CMS data updated 2026-10-02).
- 197 Adams RdWilliamstown, MA 01267 (413) 458‑3140
- 71 Hospital AveNorth Adams, MA 01247 (413) 664‑5710
Group practices
Medicare enrollment lists Douglas B. Oneill as a member of these groups (CMS data updated 2026-10-02).
- Berkshire Faculty Services Inc276 clinicians in the group
- Fairview Hospital55 clinicians in the group
Specialties
- Internal Medicineprimary
Other internal medicine doctors in Williamstown
Clinicians with the same Medicare primary specialty in Williamstown, MA — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Medical College Of Pennsylvania |
| Graduation year | 1994 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1003893082 |
| 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