NPPES file of Aug 9, 2026

Jack L. Chen, M.D.

Diagnostic Radiology Physician · Tarzana, CA

Jack L. Chen, M.D. is a diagnostic radiology physician with a practice address in Tarzana, California, and NPI 1134169139, issued on Jun 7, 2006. Check the license on the Medical Board of California; the Medicare figures below come from public CMS files.

Record from CMS NPPES, file of Aug 9, 2026 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1134169139
Name
Jack L. Chen
Credential
M.D.
Primary taxonomy
Diagnostic Radiology Physician 2085R0202X
License number
A62866 AR
Self-reported in NPPES; status is on the state search
Practice location
18344 Clark Street, Tarzana, CA 91356
Phone
(818) 881-9811
Enumerated
Jun 7, 2006
Record last updated
Nov 27, 2007 (not updated in 19 years: call before relying on the address or phone)
Fax
(818) 881-1639
Medicaid ID
00A628660 CA
Medicare enrollment
Enrolled (PECOS I20050707000588); may accept Medicare assignment
Medical or professional school
Warren Alpert Medical School Of Brown University, 1995
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). Enrollment, assignment, school and telehealth: CMS Doctors and Clinicians file, Aug 2026. A record is not a license: verify it with the state board.
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Also registered at 18344 Clark Street

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. Lawrence Chespak, M.D.Diagnostic Radiology Physician1437198058
  2. Leroy Clark, M.D.Diagnostic Radiology Physician1982643508
  3. Jerald Einziger, M.D.Diagnostic Radiology Physician1861448268
  4. Richard Gritz, M.D.Diagnostic Radiology Physician1548200637
  5. Maged Mikhail, M.D.Vascular Surgery Physician1316978299
  6. Mark Rockoff, M.D.Diagnostic Radiology Physician1679513857

Verify Jack L. Chen in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersMedical Board of CaliforniaCheck the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Open the California license search

PlainDoctor does not match the HHS-OIG exclusion list to individual records: most entries carry no NPI. Search the OIG exclusion list by name.

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16+ hospitals and group practices

  1. Glendale Adventist Medical CenterGlendale, CA · Acute Care Hospitals4 of 5 stars
  2. Adventist Health Mendocino CoastFort Bragg, CA · Critical Access Hospitals3 of 5 stars
  3. Adventist Health TulareTulare, CA · Acute Care Hospitals3 of 5 stars
  4. Adventist Health DelanoDelano, CA · Acute Care Hospitals2 of 5 stars
  5. Advanced Radiology And Interventional Associates IncStockton, CA
  6. Adventist Health Clearlake Hospital Inc.Clearlake, CA
  7. Adventist Health Medical Center TehachapiTehachapi, CA
  8. Arcadia Radiology Medical Group A Professional CorporationNewport Beach, CA
  9. Hanford Community HospitalHanford, CA
  10. Los Alamitos Radiology Group IncLos Alamitos, CA
  11. Mother Lode Diagnostic Imaging IncCrescent City, CA
  12. Radiologica IncSan Andreas, CA
  13. Radiology Medical Group OF WmmcNewport Beach, CA
  14. Rideout Memorial HospitalMarysville, CA
  15. San Joaquin Community HospitalBakersfield, CA
  16. Seven Star Hospital Associates IncHemet, CA

Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through); hospitals matched to CMS Hospital General Information (Care Compare) (data.cms.gov). Star ratings are CMS hospital ratings, not ratings of this provider.

Jack L. Chen among 4,500 diagnostic radiology physician records in California

Jack L. Chen, M.D. is one of 4,500 diagnostic radiology physician records with a practice address in California. 74% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 7% of them.

  • NPI issued2006 · 7% of these records are older, 52% newer
  • In a Medicare fileYes · 74% of these records are
  • In the CMS Doctors and Clinicians fileYes · 70% of these records are
  • Graduated1995 · median 2004 among the 3,130 with a school on file
  • Record last updated2007 · 60% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2085R0202X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

Diagnostic Radiology Physician providers in California

There are 4,500 diagnostic radiology physician records in California.

The 8 diagnostic radiology physician records with the nearest ZIP codes

  1. Lawrence Chespak, M.D.Tarzana, CA 913561437198058
  2. Leroy Clark, M.D.Tarzana, CA 913561982643508
  3. Jerald Einziger, M.D.Tarzana, CA 913561861448268
  4. Richard Gritz, M.D.Tarzana, CA 913561548200637
  5. Mark Rockoff, M.D.Tarzana, CA 913561679513857
  6. David Rubenstein, M.D.Tarzana, CA 913561235179219
  7. Rolf Arndt, MDValencia, CA 913551508811803
  8. Joshua Hanelin, M.D.Valencia, CA 913551194928770

Common questions

What is Jack L. Chen, M.D.'s NPI number?

Jack L. Chen, M.D.'s National Provider Identifier (NPI) is 1134169139, issued on Jun 7, 2006. An NPI identifies a provider in billing; it is not a license.

Where is Jack L. Chen, M.D. located?

The NPPES record lists a practice address at 18344 Clark Street, Tarzana, CA, 91356. Phone: (818) 881-9811. Providers update this record themselves, so call before visiting.

How can I verify Jack L. Chen, M.D.'s license?

Search the Medical Board of California at https://www.mbc.ca.gov/License-Verification/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.

Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.

Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.