Quick answers
- Where does Michael D. O Connor see patients?
- Medicare's clinician data lists 2 practice locations, including Pinole, CA. Call before your visit to confirm the address.
- What is Michael D. O Connor's specialty?
- Medicare lists Endocrinology as the primary specialty.
- Does Michael D. O Connor accept Medicare assignment?
- Medicare's clinician data says Michael D. O Connor may accept Medicare assignment (as of 2026-10-02). Ask the office whether they accept it for your visit.
- What is Michael D. O Connor's NPI number?
- 1386753317. 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 Michael D. O Connor is enrolled with Medicare (CMS data updated 2026-10-02).
- 1660 San Pablo Ave, Suite APinole, CA 94564
- 1660 San Pablo Ave APinole, CA 94564
Specialties
- Endocrinologyprimary
Other endocrinologists in California
Clinicians with the same Medicare primary specialty in California — not a recommendation.
Clinician information
| Medical school | Harvard Medical School |
|---|---|
| Graduation year | 1984 |
| Gender (as listed) | Male |
| Medicare assignment | May accept for some services |
| NPI (National Provider Identifier) | 1386753317 |
| 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