Quick answers
- Which hospitals does Thomas C. Hwang work at?
- Medicare's official clinician data lists Thomas C. Hwang at 2 hospitals: Hoag Memorial Hospital Presbyterian and Providence St. Joseph Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Thomas C. Hwang see patients?
- Medicare's clinician data lists 1 practice location in Tustin, CA. Call before your visit to confirm the address.
- What is Thomas C. Hwang's specialty?
- Medicare lists Internal Medicine as the primary specialty.
- Does Thomas C. Hwang accept Medicare assignment?
- Yes. Medicare's clinician data says Thomas C. Hwang 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 Thomas C. Hwang?
- (714) 838-5610, as listed in official Medicare / NPI Registry data.
- What is Thomas C. Hwang's NPI number?
- 1124039722. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Thomas C. Hwang works
Medicare's Facility Affiliation Data lists Thomas C. Hwang 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
- Providence St. Joseph HospitalOrange, CA · Acute Care Hospital · CCN 050069
Practice locations
Addresses where Thomas C. Hwang is enrolled with Medicare (CMS data updated 2026-10-02).
- 15000 Kensington Park Dr, Suite 360Tustin, CA 92782 (714) 838‑5610
Group practices
Medicare enrollment lists Thomas C. Hwang as a member of this group (CMS data updated 2026-10-02).
- Tustin Irvine Internal Medicine Group Inc.5 clinicians in the group
Specialties
- Internal Medicineprimary
Other internal medicine doctors in Tustin
Clinicians with the same Medicare primary specialty in Tustin, CA — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Saint Louis University School Of Medicine |
| Graduation year | 2003 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1124039722 |
| 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