Quick answers
- Which hospitals does Oliver B. Diaz work at?
- Medicare's official clinician data lists Oliver B. Diaz at 1 hospital: Bristol Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Oliver B. Diaz see patients?
- Medicare's clinician data lists 1 practice location in Bristol, CT. Call before your visit to confirm the address.
- What is Oliver B. Diaz's specialty?
- Medicare lists Internal Medicine as the primary specialty.
- Does Oliver B. Diaz accept Medicare assignment?
- Yes. Medicare's clinician data says Oliver B. Diaz 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 Oliver B. Diaz?
- (860) 589-5593, as listed in official Medicare / NPI Registry data.
- What is Oliver B. Diaz's NPI number?
- 1124037312. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Oliver B. Diaz works
Medicare's Facility Affiliation Data lists Oliver B. Diaz at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Bristol HospitalBristol, CT · Acute Care Hospital · CCN 070029
Practice locations
Addresses where Oliver B. Diaz is enrolled with Medicare (CMS data updated 2026-10-02).
- 46 Goodwin StBristol, CT 06010 (860) 589‑5593
Specialties
- Internal Medicineprimary
Other internal medicine doctors in Bristol
Clinicians with the same Medicare primary specialty in Bristol, CT — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 1968 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1124037312 |
| 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