Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of October 4, 2026.
NPIDirectory

Jack L Chen, MD

Individual provider Diagnostic Radiology Physician · NPI 1134169139

Jack L Chen, MD practises Diagnostic Radiology in Tarzana, California. Graduated from Warren Alpert Medical School of Brown University in 1995, 31 years ago. Practices with Willits Hospital Inc, a 67-clinician group. Licensed in Arkansas.

Years since qualifying
31
Trained at
Warren Alpert Medical School of Brown University
Licensed in
AR
In the registry since
2006
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

18344 Clark St Ste 101
Tarzana, CA 91356 Not confirmed with CMS for 18 years — call before visiting
Phone: (818) 881-9811
Fax: (818) 881-1639
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Diagnostic Radiology Physician (primary) Taxonomy 2085R0202X · Licence A62866 (AR)

Record details

NPI number1134169139
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedJune 7, 2006
Last updated in NPPESNovember 27, 2007

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyDIAGNOSTIC RADIOLOGY
Medical schoolWARREN ALPERT MEDICAL SCHOOL OF BROWN UNIVERSITY
Graduated 1995 (31 years in practice)
Group practice Willits Hospital Inc — 67 clinicians
Accepts Medicare assignment Not indicated
Practice locations30 on file with Medicare

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients1,445
Services billed 1,913 a service is one billed item, such as a visit, a test or a procedure
Average patient age74

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician. Those with a page here are linked.

Colleagues at Willits Hospital Inc

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 67 clinicians in the practice; 12 are shown here.

Other providers in Tarzana