Quick answers
- Which hospitals does Arnold H. Seto work at?
- Medicare's official clinician data lists Arnold H. Seto at 4 hospitals: John F Kennedy Memorial Hospital, Memorialcare Long Beach Medical Center, St Mary Medical Center and UCI Health-Orange. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Arnold H. Seto see patients?
- Medicare's clinician data lists 2 practice locations, including Orange, CA and Los Alamitos, CA. Call before your visit to confirm the address.
- What is Arnold H. Seto's specialty?
- Medicare lists Cardiovascular Disease (Cardiology) as the primary specialty, and also Critical Care (Intensivists).
- Does Arnold H. Seto accept Medicare assignment?
- Yes. Medicare's clinician data says Arnold H. Seto 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 Arnold H. Seto?
- (562) 594-1772, as listed in official Medicare / NPI Registry data.
- What is Arnold H. Seto's NPI number?
- 1215081807. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Arnold H. Seto works
Medicare's Facility Affiliation Data lists Arnold H. Seto at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- John F Kennedy Memorial HospitalIndio, CA · Acute Care Hospital · CCN 050534
- Memorialcare Long Beach Medical CenterLong Beach, CA · Acute Care Hospital · CCN 050485
- St Mary Medical CenterLong Beach, CA · Acute Care Hospital · CCN 050191
- UCI Health-OrangeOrange, CA · Acute Care Hospital · CCN 050348
Practice locations
Addresses where Arnold H. Seto is enrolled with Medicare (CMS data updated 2026-10-02).
- 101 the City Dr SOrange, CA 92868
- 3801 Katella Ave, Suite 401Los Alamitos, CA 90720 (562) 594‑1772
Group practices
Medicare enrollment lists Arnold H. Seto as a member of these groups (CMS data updated 2026-10-02).
- UC Regents319 clinicians in the group
- Cardiovascular Care Inc6 clinicians in the group
Specialties
Find other Cardiovascular Disease (Cardiology) doctors in California →
Other cardiologists in Orange
Clinicians with the same Medicare primary specialty in Orange, CA — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Harvard Medical School |
| Graduation year | 2001 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1215081807 |
| 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