Quick answers
- Which hospitals does Daniel T. Thieu work at?
- Medicare's official clinician data lists Daniel T. Thieu at 1 hospital: Providence St. Joseph Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Daniel T. Thieu see patients?
- Medicare's clinician data lists 1 practice location in Orange, CA. Call before your visit to confirm the address.
- What is Daniel T. Thieu's specialty?
- Medicare lists Family Practice as the primary specialty.
- Does Daniel T. Thieu accept Medicare assignment?
- Yes. Medicare's clinician data says Daniel T. Thieu 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 Daniel T. Thieu offer telehealth?
- Medicare's clinician data says Daniel T. Thieu offers telehealth services. Ask the office which visits can be done by video or phone.
- What is the phone number for Daniel T. Thieu?
- (714) 633-7175, as listed in official Medicare / NPI Registry data.
- What is Daniel T. Thieu's NPI number?
- 1154070886. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Daniel T. Thieu works
Medicare's Facility Affiliation Data lists Daniel T. Thieu at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Providence St. Joseph HospitalOrange, CA · Acute Care Hospital · CCN 050069
Practice locations
Addresses where Daniel T. Thieu is enrolled with Medicare (CMS data updated 2026-10-02).
- 2501 E Chapman AveOrange, CA 92869 (714) 633‑7175
Group practices
Medicare enrollment lists Daniel T. Thieu as a member of this group (CMS data updated 2026-10-02).
- Providence Medical Foundation1,466 clinicians in the group
Specialties
- Family Practiceprimary
Other family doctors in Orange
Clinicians with the same Medicare primary specialty in Orange, CA — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 2022 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1154070886 |
| 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