Quick answers
- Which hospitals does Mary E. Sage work at?
- Medicare's official clinician data lists Mary E. Sage at 1 hospital: Kaiser Foundation Hospital - Fremont. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Mary E. Sage see patients?
- Medicare's clinician data lists 2 practice locations, including Fremont, CA and Richmond, CA. Call before your visit to confirm the address.
- What is Mary E. Sage's specialty?
- Medicare lists Psychiatry as the primary specialty, and also Addiction Medicine.
- Does Mary E. Sage accept Medicare assignment?
- Yes. Medicare's clinician data says Mary E. Sage 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 Mary E. Sage?
- (510) 248-3000, as listed in official Medicare / NPI Registry data.
- What is Mary E. Sage's NPI number?
- 1184702953. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Mary E. Sage works
Medicare's Facility Affiliation Data lists Mary E. Sage at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Kaiser Foundation Hospital - FremontFremont, CA · Acute Care Hospital · CCN 050512
Practice locations
Addresses where Mary E. Sage is enrolled with Medicare (CMS data updated 2026-10-02).
- 39400 Paseo Padre PkwyFremont, CA 94538 (510) 248‑3000
- 901 Nevin AveRichmond, CA 94801 (510) 307‑1500
Group practices
Medicare enrollment lists Mary E. Sage as a member of this group (CMS data updated 2026-10-02).
- Permanente Medical Group Inc10,996 clinicians in the group
Specialties
- Psychiatryprimary
- Addiction Medicinealso
Other psychiatrists in Fremont
Clinicians with the same Medicare primary specialty in Fremont, CA — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | New York Medical College |
| Graduation year | 2001 |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1184702953 |
| 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