John Chen, M.D.
John Chen, M.D. is a Diagnostic Radiology Physician in Los Angeles, CA, registered under NPI 1174639942. This provider registers 8 separate taxonomy codes, which usually means they practise across more than one recognised specialty.
Getting there
The practice address on file is 1300 N VERMONT AVE DEPT OF RADIOLOGY, Los Angeles, CA 90027. We have not yet mapped what surrounds this office — parking, transit, and nearby pharmacies are added as our data collection reaches each location.
Credentials and Medicare
| Licence | State | Specialty |
|---|---|---|
| A42452 | CA | Diagnostic Radiology Physician primary |
| A42452 | CA | Body Imaging Physician |
| A42452 | CA | Neuroradiology Physician |
| A42452 | CA | Nuclear Radiology Physician |
| A42452 | CA | Pediatric Radiology Physician |
| A42452 | CA | Therapeutic Radiology Physician |
| A42452 | CA | Vascular & Interventional Radiology… |
| A42452 | CA | Diagnostic Ultrasound Physician |
This provider holds licence A42452 issued in CA. A licence number in NPPES reflects what was filed at registration — it does not confirm the licence is still active today.
This NPI does not appear in the PECOS Medicare enrolment file. Providers who do not bill Medicare — or who bill only through a group's enrolment — will not appear here. It is not a sign of any problem with the registration.
What Diagnostic Radiology covers
A radiologist who utilizes x-ray, radionuclides, ultrasound and electromagnetic radiation to diagnose and treat disease. NUCC Health Care Provider Taxonomy, code 2085R0202X
All registered taxonomy codes
This provider registers 8 taxonomy codes. The primary code is what appears on most claims; the others record additional recognised specialties.
| Code | Specialty | Licence | State | |
|---|---|---|---|---|
| 2085R0202X | Diagnostic Radiology Physician Diagnostic Radiology | A42452 | CA | primary |
| 2085B0100X | Body Imaging Physician Body Imaging | A42452 | CA | |
| 2085N0700X | Neuroradiology Physician Neuroradiology | A42452 | CA | |
| 2085N0904X | Nuclear Radiology Physician Nuclear Radiology | A42452 | CA | |
| 2085P0229X | Pediatric Radiology Physician Pediatric Radiology | A42452 | CA | |
| 2085R0203X | Therapeutic Radiology Physician Therapeutic Radiology | A42452 | CA | |
| 2085R0204X | Vascular & Interventional Radiology Physician Vascular & Interventional Radiology | A42452 | CA | |
| 2085U0001X | Diagnostic Ultrasound Physician Diagnostic Ultrasound | A42452 | CA |
The taxonomy records how the provider classifies their own practice. It does not confirm which conditions they currently treat, whether they are accepting new patients, or which insurance they take — call the office for that.
Full NPPES record
An NPI-1 identifies a single person. It stays with the clinician for life, even if they move practice or change state, which is why the address on file can lag behind where they actually work today.
| NPI | 1174639942 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Aug 22, 2006 |
| Last updated | Mar 7, 2023 |
| Status | Active |
| Sole proprietor | No |
| Credential | M.D. |
| Practice address |
1300 N VERMONT AVE DEPT OF RADIOLOGY Los Angeles, CA 90027 (323) 913-4260 Fax (323) 913-4922 |
| Mailing address |
PO BOX 657 West Covina, CA 91793 |
| Other identifiers |
WA42452D
· Other (CA) 00A424520 · Medicaid (CA) A42452 · Other (CA) |
Number check
How the check works, step by step
Every NPI carries a Luhn check digit — the same scheme used on credit cards. CMS prefixes the number with 80840 before computing it, which marks it as a US health identifier.
| Digit | 8 | 0 | 8 | 4 | 0 | 1 | 1 | 7 | 4 | 6 | 3 | 9 | 9 | 4 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 1 | 5 | 4 | 3 | 3 | 9 | 9 | 8 |
Sum = 68 · next multiple of 10 = 70 · check digit = 2 · actual last digit = 2
A valid check digit only means the number is well-formed. It does not mean the provider is licensed, active, or in good standing — those are separate questions answered by the sections above.