Quick answers
- Which hospitals does Trevor Tsay work at?
- Medicare's official clinician data lists Trevor Tsay at 1 hospital: Hoag Memorial Hospital Presbyterian. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Trevor Tsay see patients?
- Medicare's clinician data lists 1 practice location in Costa Mesa, CA. Call before your visit to confirm the address.
- What is Trevor Tsay's specialty?
- Medicare lists Family Practice as the primary specialty, and also Hospitalist.
- Does Trevor Tsay accept Medicare assignment?
- Yes. Medicare's clinician data says Trevor Tsay 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 Trevor Tsay?
- (949) 791-8888, as listed in official Medicare / NPI Registry data.
- What is Trevor Tsay's NPI number?
- 1760944110. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Trevor Tsay works
Medicare's Facility Affiliation Data lists Trevor Tsay at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Hoag Memorial Hospital PresbyterianNewport Beach, CA · Acute Care Hospital · CCN 050224
Practice locations
Addresses where Trevor Tsay is enrolled with Medicare (CMS data updated 2026-10-02).
- 1640 Newport Blvd, Suite 440Costa Mesa, CA 92627 (949) 791‑8888
Specialties
- Family Practiceprimary
- Hospitalistalso
Other family doctors in Costa Mesa
Clinicians with the same Medicare primary specialty in Costa Mesa, CA — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 2019 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1760944110 |
| 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