Quick answers
- Which hospitals does Michael H. Bien work at?
- Medicare's official clinician data lists Michael H. Bien at 5 hospitals: Casa Colina Hospital, Chino Valley Medical Center, Montclair Hospital Medical Center, Pomona Valley Hospital Medical Center and San Antonio Regional Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Michael H. Bien see patients?
- Medicare's clinician data lists 6 practice locations, including Ontario, CA, San Dimas, CA and West Covina, CA. Call before your visit to confirm the address.
- What is Michael H. Bien's specialty?
- Medicare lists Internal Medicine as the primary specialty, and also Nephrology.
- Does Michael H. Bien accept Medicare assignment?
- Yes. Medicare's clinician data says Michael H. Bien 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.
- Does Michael H. Bien offer telehealth?
- Medicare's clinician data says Michael H. Bien offers telehealth services. Ask the office which visits can be done by video or phone.
- What is the phone number for Michael H. Bien?
- (909) 542-2777, as listed in official Medicare / NPI Registry data.
- What is Michael H. Bien's NPI number?
- 1689680654. 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 H. Bien works
Medicare's Facility Affiliation Data lists Michael H. Bien at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Casa Colina HospitalPomona, CA · Acute Care Hospital · CCN 050782
- Chino Valley Medical CenterChino, CA · Acute Care Hospital · CCN 050586
- Montclair Hospital Medical CenterMontclair, CA · Acute Care Hospital · CCN 050758
- Pomona Valley Hospital Medical CenterPomona, CA · Acute Care Hospital · CCN 050231
- San Antonio Regional HospitalUpland, CA · Acute Care Hospital · CCN 050099
Practice locations
Addresses where Michael H. Bien is enrolled with Medicare (CMS data updated 2026-10-02). The first 5 of 6; the Medicare profile lists all.
- 1304 W Holt Blvd, Suite AOntario, CA 91762 (909) 542‑2777
- 1335 Cypress St, Suite 205San Dimas, CA 91773
- 1433 W Merced AveWest Covina, CA 91790 (626) 960‑4989
- 1433 W Merced Ave, Suite 103West Covina, CA 91790 (626) 960‑4989
- 315 N 3rd Ave, Suite 104Covina, CA 91723 (626) 332‑2777
Group practices
Medicare enrollment lists Michael H. Bien as a member of these groups (CMS data updated 2026-10-02).
- California Kidney Specialists16 clinicians in the group
- Cua and Gan Medical Corporation4 clinicians in the group
- Cua, Gan and Bien Medical Corporation3 clinicians in the group
Specialties
- Internal Medicineprimary
- Nephrologyalso
Other internal medicine doctors in Ontario
Clinicians with the same Medicare primary specialty in Ontario, CA — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Irvine California College Of Medicine |
| Graduation year | 2004 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1689680654 |
| 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