Frederic Leong, MD
NPI 1598876070 · Pediatric Cardiology Physician · Thousand Oaks, CA
Enrolled with Medicare as Practitioner - Pediatric Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Frederic Leong, MD is a Pediatric Cardiology Physician provider in Thousand Oaks, CA (NPI 1598876070).
Provider details
- NPI number
- 1598876070
- Entity type
- Individual
- Primary specialty
- Pediatric Cardiology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- G071490 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
19 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-08-31
- Last updated
- 2023-07-14
- Certified
- 2023-07-14
Frequently asked questions
- What is Frederic Leong's NPI number?
- Frederic Leong's National Provider Identifier (NPI) is 1598876070, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Frederic Leong's specialty?
- Frederic Leong is listed in the NPPES registry with a primary specialty of Pediatric Cardiology Physician (Allopathic & Osteopathic Physicians).
- Where is Frederic Leong located?
- Frederic Leong's practice location on file with NPPES is 227 W Janss, Thousand Oaks, CA 91360.
- What is Frederic Leong's phone number?
- The practice phone number listed in the NPPES registry for Frederic Leong is (805) 497-7214.
- Does Frederic Leong accept Medicare?
- Frederic Leong is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Frederic Leong's NPI active?
- Yes — Frederic Leong's NPI (1598876070) is active in the NPPES registry as of the last update on 2023-07-14.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.