Quick answers
- Which hospitals does Benjamin Bak work at?
- Medicare's official clinician data lists Benjamin Bak at 5 hospitals: Eisenhower Medical Center, Highland Hospital, Mercy Hospital Oklahoma City, Inc, Mercy Medical Center and WellSpan Chambersburg Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Benjamin Bak see patients?
- Medicare's clinician data lists 2 practice locations, including Sunnyvale, CA and Los Altos, CA. Call before your visit to confirm the address.
- What is Benjamin Bak's specialty?
- Medicare lists Diagnostic Radiology as the primary specialty.
- Does Benjamin Bak accept Medicare assignment?
- Yes. Medicare's clinician data says Benjamin Bak 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 Benjamin Bak?
- (952) 595-1100, as listed in official Medicare / NPI Registry data.
- What is Benjamin Bak's NPI number?
- 1821059767. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Benjamin Bak works
Medicare's Facility Affiliation Data lists Benjamin Bak at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Eisenhower Medical CenterRancho Mirage, CA · Acute Care Hospital · CCN 050573
- Highland HospitalOakland, CA · Acute Care Hospital · CCN 050320
- Mercy Hospital Oklahoma City, IncOklahoma City, OK · Acute Care Hospital · CCN 370013
- Mercy Medical CenterRoseburg, OR · Acute Care Hospital · CCN 380027
- WellSpan Chambersburg HospitalChambersburg, PA · Acute Care Hospital · CCN 390151
Practice locations
Addresses where Benjamin Bak is enrolled with Medicare (CMS data updated 2026-10-02).
- 1267 Townsend TerSunnyvale, CA 94087 (952) 595‑1100
- 370 Distel CirLos Altos, CA 94022 (650) 254‑5200
Group practices
Medicare enrollment lists Benjamin Bak as a member of these groups (CMS data updated 2026-10-02).
- Sutter Bay Medical Foundation3,829 clinicians in the group
- Geisinger Clinic3,467 clinicians in the group
- Palm Desert Radiology Medical Group Inc125 clinicians in the group
- Virtual Radiologic Professionals of California PA54 clinicians in the group
- Roseburg Radiologists PC45 clinicians in the group
Specialties
- Diagnostic Radiologyprimary
Other radiologists in Sunnyvale
Clinicians with the same Medicare primary specialty in Sunnyvale, CA — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Loma Linda University School Of Medicine |
| Graduation year | 1995 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1821059767 |
| 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