Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Nathaniel Leong, M.D.

Family Medicine Physician in San Pedro, CA · enumerated 2012.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1326396664

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Registry record

Entity type Individual (Type 1)

Name Nathaniel Leong

Credential M.D.

Sex Male

Practice address San Pedro, CA, 90732

Phone (310) 832-3311

Enumeration date Aug 16, 2012

Last updated in NPPES Jan 28, 2014

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

207Q00000X Family Medicine Physician Allopathic & Osteopathic Physicians · License A122322 (CA) Primary

MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

What is an NPI number?

A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.

Read the full guide → Validate an NPI →

Frequently asked questions

How do I verify Nathaniel Leong's NPI record?

Cross-check NPI 1326396664 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1326396664 active?

Yes, as of the latest NPPES snapshot, NPI 1326396664 is active (record last updated 2014-01-28).

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2014-01-28.