Quick answers
- Which hospitals does Duc Nguyen work at?
- Medicare's official clinician data lists Duc Nguyen at 5 hospitals: Adventist Health Simi Valley, Community Memorial Hospital - Ventura, Los Robles Hospital & Medical Center, Marian Regional Medical Center and Saint Francis Medical Center. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Duc Nguyen see patients?
- Medicare's clinician data lists 1 practice location in Simi Valley, CA. Call before your visit to confirm the address.
- What is Duc Nguyen's specialty?
- Medicare lists Internal Medicine as the primary specialty, and also Critical Care (Intensivists) and Pulmonary Disease.
- Does Duc Nguyen accept Medicare assignment?
- Yes. Medicare's clinician data says Duc Nguyen 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 Duc Nguyen offer telehealth?
- Medicare's clinician data says Duc Nguyen offers telehealth services. Ask the office which visits can be done by video or phone.
- What is the phone number for Duc Nguyen?
- (805) 520-1577, as listed in official Medicare / NPI Registry data.
- What is Duc Nguyen's NPI number?
- 1306945365. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Duc Nguyen works
Medicare's Facility Affiliation Data lists Duc Nguyen at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Adventist Health Simi ValleySimi Valley, CA · Acute Care Hospital · CCN 050236
- Community Memorial Hospital - VenturaVentura, CA · Acute Care Hospital · CCN 050394
- Los Robles Hospital & Medical CenterThousand Oaks, CA · Acute Care Hospital · CCN 050549
- Marian Regional Medical CenterSanta Maria, CA · Acute Care Hospital · CCN 050107
- Saint Francis Medical CenterCape Girardeau, MO · Acute Care Hospital · CCN 260183
Practice locations
Addresses where Duc Nguyen is enrolled with Medicare (CMS data updated 2026-10-02).
- 1177 Roadrunner WaySimi Valley, CA 93065 (805) 520‑1577
Specialties
Other internal medicine doctors in Simi Valley
Clinicians with the same Medicare primary specialty in Simi Valley, CA — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of California, Irvine, California College Of Medicine |
| Graduation year | 1989 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1306945365 |
| 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