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FREDERIC J LEONG MD
NPI 1598876070
Pediatrics - Pediatric Cardiology in Thousand Oaks, CA

Active since August 31, 2006PECOS EnrolledAccepts Medicare Assignment
227 W JANSS, #205, THOUSAND OAKS, CA 91360(805) 497-7214(805) 497-0864 Get Directions Write a Review

NPPES record last updated: July 14, 2023. Verified against the NPPES registry weekly; last sync: October 18, 2026.

About Frederic J Leong Md NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

FREDERIC J LEONG MD (NPI 1598876070) is an individual pediatric cardiology provider in Thousand Oaks, California, licensed in California (G071490) and active in the NPI registry since August 2006. He is enrolled in Medicare PECOS and is a graduate of University Of Missouri, Kansas City, School Of Medicine (1989).

NPPES Registry Identity

NPI1598876070
Entity TypeIndividualMale
Primary Taxonomy2080P0202X
Provider Legal NameFREDERIC J LEONGCredential: MD
Location Address227 W JANSS, #205Thousand Oaks, CA 91360
Mailing Address227 W Janss, #205Thousand Oaks, CA 91360 · (805) 497-7214 · Fax (805) 497-0864
Phone(805) 497-7214
Fax(805) 497-0864
Sole ProprietorNo
Medical School CMSUniversity Of Missouri, Kansas City, School Of MedicineGraduated 1989
Enumeration DateAugust 31, 2006
Last NPPES UpdateJuly 14, 2023
NPPES CertifiedJuly 14, 2023
✔ NPI 1598876070 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPediatrics · Pediatric CardiologyAllopathic & Osteopathic Physicians
Taxonomy Code2080P0202X
License✔ Licensed in CA · G071490
Definition
A pediatric cardiologist provides comprehensive care to patients with cardiovascular problems. This specialist is skilled in selecting, performing and evaluating the structural and functional assessment of the heart and blood vessels, and the clinical evaluation of cardiovascular disease.
227 W JANSS, Thousand Oaks, CA 91360
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Other Identifiers 1

Medicaid00G714901CA

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Frederic J Leong Md is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID4789614363
PECOS Enrollment IDI20130911000562
Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignment

Medicare enrollment records show Frederic Leong reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

County Of Ventura
1.9 mi
Community/Behavioral Health
125 W THOUSAND OAKS BLVD, STE 400 AND STE 500
Thousand Oaks, CA 91360
  • Reassigned Medicare billing, California enrollment
  • 710 clinicians in this Medicare group
NPI 1467571422 (805) 777-3500

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Frederic Leong's NPI number?

The NPI number for Frederic Leong is 1598876070. It was assigned to this individual provider in the NPPES registry on August 31, 2006.

Where is Frederic Leong located?

Frederic Leong practices at 227 W Janss #205, Thousand Oaks, CA 91360. The listed phone number is (805) 497-7214.

What is Frederic Leong's specialty?

The primary specialty registered for this NPI is Pediatrics, specializing in Pediatric Cardiology, with taxonomy code 2080P0202X.

Is Frederic Leong enrolled in Medicare?

Yes. Frederic Leong is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

Which organization bills Medicare for Frederic Leong's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Frederic Leong reassigns Medicare benefits to County Of Ventura (Thousand Oaks, CA). The reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Frederic Leong's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

When was this NPI record last updated?

The NPPES record for Frederic Leong was last updated on July 14, 2023. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.