Quick answers
- Which hospitals does Vivian To work at?
- Medicare's official clinician data lists Vivian To at 3 hospitals: Alhambra Hospital Medical Center, Garfield Medical Center and PIH Health Good Samaritan Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Vivian To see patients?
- Medicare's clinician data lists 4 practice locations, including Downey, CA, Los Angeles, CA and La Mirada, CA. Call before your visit to confirm the address.
- What is Vivian To's specialty?
- Medicare lists Hospitalist as the primary specialty.
- Does Vivian To accept Medicare assignment?
- Yes. Medicare's clinician data says Vivian To 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 Vivian To?
- (562) 904-5000, as listed in official Medicare / NPI Registry data.
- What is Vivian To's NPI number?
- 1043899230. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Vivian To works
Medicare's Facility Affiliation Data lists Vivian To at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Alhambra Hospital Medical CenterAlhambra, CA · Acute Care Hospital · CCN 050281
- Garfield Medical CenterMonterey Park, CA · Acute Care Hospital · CCN 050737
- PIH Health Good Samaritan HospitalLos Angeles, CA · Acute Care Hospital · CCN 050471
Practice locations
Addresses where Vivian To is enrolled with Medicare (CMS data updated 2026-10-02).
- 11500 Brookshire AveDowney, CA 90241 (562) 904‑5000
- 12214 Lakewood Blvd, Suite 110Downey, CA 90242 (562) 904‑4430
- 1225 Wilshire BlvdLos Angeles, CA 90017 (213) 977‑2121
- 12675 La Mirada Blvd, Suite 201and401La Mirada, CA 90638 (562) 903‑7339
Group practices
Medicare enrollment lists Vivian To as a member of this group (CMS data updated 2026-10-02).
- PIH Health Physicians622 clinicians in the group
Specialties
- Hospitalistprimary
Other hospitalists in Downey
Clinicians with the same Medicare primary specialty in Downey, CA — not a recommendation.
Clinician information
| Credential | DO |
|---|---|
| Medical school | West Virginia School Of Osteopathic Medicine |
| Graduation year | 2021 |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1043899230 |
| 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