LEANN ARLEEN WILLIAMS MD
NPI 1437451499
Pediatrics in Ladera Ranch, CA

Q: What is Leann Williams's NPI number?

The NPI number for Leann Williams is 1437451499. It was assigned to this individual provider in the NPPES registry on November 24, 2010. The provider is also known as Leann Arleen Olson MD.

Q: What is Leann Williams's specialty?

The primary specialty registered for this NPI is Pediatrics with taxonomy code 208000000X.

Q: When was this NPI record last updated?

The NPPES record for Leann Williams was last updated on March 27, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 16 months 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.

Active since November 24, 2010

600 CORPORATE DR STE 110, LADERA RANCH, CA 92694(949) 328-1837(949) 328-1838 Get Directions Write a Review

NPPES record last updated: March 27, 2025. Verified against the NPPES registry weekly; last sync: August 02, 2026.

Record update history: Mar 27, 2025, Sep 26, 2024 (2 updates tracked since 2024).

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About Leann Arleen Williams Md NPPES

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

LEANN ARLEEN WILLIAMS MD (NPI 1437451499) is an individual pediatrics provider in Ladera Ranch, California, licensed in California (A114783) and active in the NPI registry since November 2010.

NPPES Registry Identity

NPI1437451499

Entity TypeIndividualFemale

Primary Taxonomy208000000X

Provider Legal NameLEANN ARLEEN WILLIAMSCredential: MD

Location Address600 CORPORATE DR STE 110Ladera Ranch, CA 92694-2107

Mailing Address600 Corporate Dr Ste 110Ladera Ranch, CA 92694-2107 · (949) 328-1837 · Fax (949) 328-1838

Phone(949) 328-1837

Fax(949) 328-1838

Sole ProprietorNo

Enumeration DateNovember 24, 2010

Last NPPES UpdateMarch 27, 20252 updates tracked since enumeration

NPPES CertifiedMarch 27, 2025

✔ NPI 1437451499 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPediatricsAllopathic & Osteopathic Physicians

Taxonomy Code208000000X

License✔ Licensed in CA · A114783

Definition

A pediatrician is concerned with the physical, emotional and social health of children from birth to young adulthood. Care encompasses a broad spectrum of health services ranging from preventive healthcare to the diagnosis and treatment of acute and chronic diseases. A pediatrician deals with biological, social and environmental influences on the developing child, and with the impact of disease and dysfunction on development.

600 CORPORATE DR STE 110, Ladera Ranch, CA 92694

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Other Names 1

Former Name (1)Leann Arleen Olson Md

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

TRENT DAVID ETTER

Behavior Technician