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Lydia Bai-Tsin Ann

Psychiatry Physician in Orange, CA · enumerated 2018.

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

National Provider Identifier

1316433303

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Registry record

Entity type Individual (Type 1)
Name Lydia Bai-Tsin Ann
Sex Female
Practice address 3800 W Chapman Ave Ste 500, Orange, CA, 92868
Phone (714) 456-5902
Enumeration date Jul 3, 2018
Last updated in NPPES Jul 16, 2024

Taxonomy & licenses

2084P0805X Geriatric Psychiatry Physician Allopathic & Osteopathic Physicians · License A164652 (CA) Secondary
208D00000X General Practice Physician Allopathic & Osteopathic Physicians · License A164652 (CA) Secondary
2084P0800X Psychiatry Physician Allopathic & Osteopathic Physicians · License A164652 (CA) Primary

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.

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Frequently asked questions

Where does Lydia Ann practice?
The practice location on file with NPPES is in Orange, CA. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for Lydia Ann?
The National Provider Identifier (NPI) for Lydia Ann is 1316433303, a Type 1 (individual) record in the CMS NPPES registry.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2024-07-16.