Quick answers
- Which hospitals does Michael R. Gagnon work at?
- Medicare's official clinician data lists Michael R. Gagnon at 3 hospitals: San Ramon Regional Medical Center, Stanford Health Care and Stanford Health Care Tri-Valley. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Michael R. Gagnon see patients?
- Medicare's clinician data lists 2 practice locations, including Livermore, CA and Pleasanton, CA. Call before your visit to confirm the address.
- What is Michael R. Gagnon's specialty?
- Medicare lists Ophthalmology as the primary specialty.
- Does Michael R. Gagnon accept Medicare assignment?
- Yes. Medicare's clinician data says Michael R. Gagnon 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 Michael R. Gagnon?
- (925) 449-4000, as listed in official Medicare / NPI Registry data.
- What is Michael R. Gagnon's NPI number?
- 1164525598. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Michael R. Gagnon works
Medicare's Facility Affiliation Data lists Michael R. Gagnon at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- San Ramon Regional Medical CenterSan Ramon, CA · Acute Care Hospital · CCN 050689
- Stanford Health CareStanford, CA · Acute Care Hospital · CCN 050441
- Stanford Health Care Tri-ValleyPleasanton, CA · Acute Care Hospital · CCN 050283
Practice locations
Addresses where Michael R. Gagnon is enrolled with Medicare (CMS data updated 2026-10-02).
- 28 Fenton StLivermore, CA 94550 (925) 449‑4000
- 5575 W Las Positas Blvd, Suite 240Pleasanton, CA 94588 (925) 460‑5000
Group practices
Medicare enrollment lists Michael R. Gagnon as a member of this group (CMS data updated 2026-10-02).
- Gagnon Vision Medical Group Inc7 clinicians in the group
Specialties
- Ophthalmologyprimary
Other ophthalmologists in Livermore
Clinicians with the same Medicare primary specialty in Livermore, CA — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Creighton University School Of Medicine |
| Graduation year | 2001 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1164525598 |
| 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