Quick answers
- Which hospitals does Mariam Mostamandy work at?
- Medicare's official clinician data lists Mariam Mostamandy at 5 hospitals: Alta Bates Summit Medical Center, Eden Medical Center, Good Samaritan Hospital, John Muir Medical Center - Concord Campus and John Muir Medical Center - Walnut Creek Campus. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Mariam Mostamandy see patients?
- Medicare's clinician data lists 12 practice locations, including Sacramento, CA, Walnut Creek, CA and Castro Valley, CA. Call before your visit to confirm the address.
- What is Mariam Mostamandy's specialty?
- Medicare lists Diagnostic Radiology as the primary specialty.
- Does Mariam Mostamandy accept Medicare assignment?
- Medicare's clinician data says Mariam Mostamandy may accept Medicare assignment (as of 2026-10-02). Ask the office whether they accept it for your visit.
- What is the phone number for Mariam Mostamandy?
- (925) 296-7150, as listed in official Medicare / NPI Registry data.
- What is Mariam Mostamandy's NPI number?
- 1225666209. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Mariam Mostamandy works
Medicare's Facility Affiliation Data lists Mariam Mostamandy at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Alta Bates Summit Medical CenterOakland, CA · Acute Care Hospital · CCN 050043
- Eden Medical CenterCastro Valley, CA · Acute Care Hospital · CCN 050488
- Good Samaritan HospitalSan Jose, CA · Acute Care Hospital · CCN 050380
- John Muir Medical Center - Concord CampusConcord, CA · Acute Care Hospital · CCN 050496
- John Muir Medical Center - Walnut Creek CampusWalnut Creek, CA · Acute Care Hospital · CCN 050180
Practice locations
Addresses where Mariam Mostamandy is enrolled with Medicare (CMS data updated 2026-10-02). The first 5 of 12; the Medicare profile lists all.
- 1124 57th StSacramento, CA 95819 (925) 296‑7150
- 1601 Ygnacio Vly RdWalnut Creek, CA 94596 (925) 939‑3000
- 20101 Lake Chabot RdCastro Valley, CA 94546 (925) 296‑7150
- 20103 Lake Chabot Rd, Suite 103Castro Valley, CA 94546 (510) 899‑5052
- 2450 Ashby AveBerkeley, CA 94705 (510) 204‑1566
Group practices
Medicare enrollment lists Mariam Mostamandy as a member of these groups (CMS data updated 2026-10-02).
- County of Santa Clara1,022 clinicians in the group
- Bay Imaging Consultants Medical Group Inc146 clinicians in the group
- John Muir Trauma Physicians Billing Service113 clinicians in the group
- John Muir Magnetic Imaging Center57 clinicians in the group
Specialties
- Diagnostic Radiologyprimary
Other radiologists in Sacramento
Clinicians with the same Medicare primary specialty in Sacramento, CA — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 2020 |
| Gender (as listed) | Female |
| Medicare assignment | May accept for some services |
| NPI (National Provider Identifier) | 1225666209 |
| 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