Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.

Frederic J Leong, MD

Individual provider Pediatric Cardiology Physician · NPI 1598876070

Frederic J Leong, MD is a Pediatric Medicine in Thousand Oaks, California. Graduated from University of Missouri, Kansas City, School of Medicine in 1989, 37 years ago. Practices with County of Ventura, a 274-clinician group and accepts Medicare assignment. Licensed in California.

Years since qualifying
37
Trained at
University of Missouri, Kansas City, School of Medicine
Licensed in
CA
In the registry since
2006
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

See every abbreviation used in this directory →

Practice location Address checks out

227 W Janss #205
Thousand Oaks, CA 91360
Phone: (805) 497-7214
Fax: (805) 497-0864
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Pediatric Cardiology Physician (primary) Taxonomy 2080P0202X · Licence G071490 (CA)

Record details

NPI number1598876070
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedAugust 31, 2006
Last updated in NPPESJuly 14, 2023
Certification dateJuly 14, 2023
Mailing address227 W Janss, 205, Thousand Oaks, CA 91360

Medicare enrollment

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

Medicare specialtyPEDIATRIC MEDICINE
Also practisesCARDIAC SURGERY
Medical schoolUNIVERSITY OF MISSOURI, KANSAS CITY, SCHOOL OF MEDICINE
Graduated 1989 (37 years in practice)
Group practice County Of Ventura — 274 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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