Quick answers
- Which hospitals does Johnathan Chen work at?
- Medicare's official clinician data lists Johnathan Chen at 4 hospitals: Martin Luther King, Jr. Community Hospital, Ronald Reagan UCLA Medical Center, Santa Monica - UCLA Med Ctr & Orthopaedic Hospital and UCLA West Valley Medical Center. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Johnathan Chen see patients?
- Medicare's clinician data lists 5 practice locations, including Thousand Oaks, CA, Santa Monica, CA and Compton, CA. Call before your visit to confirm the address.
- What is Johnathan Chen's specialty?
- Medicare lists Diagnostic Radiology as the primary specialty.
- Does Johnathan Chen accept Medicare assignment?
- Yes. Medicare's clinician data says Johnathan 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 Johnathan Chen?
- (805) 418-3500, as listed in official Medicare / NPI Registry data.
- What is Johnathan Chen's NPI number?
- 1669798443. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Johnathan Chen works
Medicare's Facility Affiliation Data lists Johnathan Chen at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Martin Luther King, Jr. Community HospitalLos Angeles, CA · Acute Care Hospital · CCN 050779
- Ronald Reagan UCLA Medical CenterLos Angeles, CA · Acute Care Hospital · CCN 050262
- Santa Monica - UCLA Med Ctr & Orthopaedic HospitalSanta Monica, CA · Acute Care Hospital · CCN 050112
- UCLA West Valley Medical CenterWest Hills, CA · Acute Care Hospital · CCN 050481
Practice locations
Addresses where Johnathan Chen is enrolled with Medicare (CMS data updated 2026-10-02).
- 100 Moody CtThousand Oaks, CA 91360 (805) 418‑3500
- 1245 16th St, Suite 100Santa Monica, CA 90404 (424) 259‑6042
- 135 E Compton BlvdCompton, CA 90220 (424) 338‑8790
- 1680 E 120th StLos Angeles, CA 90059
- 2215 W Rosecrans AveCompton, CA 90222
Group practices
Medicare enrollment lists Johnathan Chen as a member of these groups (CMS data updated 2026-10-02).
- Martin Luther King Jr Community Medical Foundation206 clinicians in the group
- UCLA Radiology Medical Group202 clinicians in the group
Specialties
- Diagnostic Radiologyprimary
Other radiologists in Thousand Oaks
Clinicians with the same Medicare primary specialty in Thousand Oaks, CA — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | New York University School Of Medicine |
| Graduation year | 2009 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1669798443 |
| 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