Quick answers
- Where does William R. Obrien Dibrielle see patients?
- Medicare's clinician data lists 1 practice location in San Francisco, CA. Call before your visit to confirm the address.
- What is William R. Obrien Dibrielle's specialty?
- Medicare lists Internal Medicine as the primary specialty.
- Does William R. Obrien Dibrielle accept Medicare assignment?
- Yes. Medicare's clinician data says William R. Obrien Dibrielle 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 R. Obrien Dibrielle?
- (415) 833-2200, as listed in official Medicare / NPI Registry data.
- What is William R. Obrien Dibrielle's NPI number?
- 1043483837. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Practice locations
Addresses where William R. Obrien Dibrielle is enrolled with Medicare (CMS data updated 2026-10-02).
- 2238 Geary BlvdSan Francisco, CA 94115 (415) 833‑2200
Group practices
Medicare enrollment lists William R. Obrien Dibrielle as a member of this group (CMS data updated 2026-10-02).
- Permanente Medical Group Inc10,996 clinicians in the group
Specialties
- Internal Medicineprimary
Other internal medicine doctors in San Francisco
Clinicians with the same Medicare primary specialty in San Francisco, CA — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Albert Einstein College Of Medicine Of Yeshiva University |
| Graduation year | 2008 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1043483837 |
| 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
- 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