Quick answers
- Where does Yi-Jen Chen see patients?
- Medicare's clinician data lists 2 practice locations, including South Pasadena, CA and Arcadia, CA. Call before your visit to confirm the address.
- What is Yi-Jen Chen's specialty?
- Medicare lists Radiation Oncology as the primary specialty.
- Does Yi-Jen Chen accept Medicare assignment?
- Yes. Medicare's clinician data says Yi-Jen Chen 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 Yi-Jen Chen?
- (626) 396-2900, as listed in official Medicare / NPI Registry data.
- What is Yi-Jen Chen's NPI number?
- 1972698868. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Practice locations
Addresses where Yi-Jen Chen is enrolled with Medicare (CMS data updated 2026-10-02).
- 209 Fair Oaks AveSouth Pasadena, CA 91030 (626) 396‑2900
- 301 W Huntington Dr, Suite 400Arcadia, CA 91007 (626) 218‑9840
Group practices
Medicare enrollment lists Yi-Jen Chen as a member of this group (CMS data updated 2026-10-02).
- City of Hope Medical Foundation982 clinicians in the group
Specialties
- Radiation Oncologyprimary
Other radiation oncologists in South Pasadena
Clinicians with the same Medicare primary specialty in South Pasadena, CA — not a recommendation.
Clinician information
| Graduation year | 1984 |
|---|---|
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1972698868 |
| 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
- 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