Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

D William Nguyen MD Apc

Q: What is the NPI number for D William Nguyen MD Apc?

The NPI for D William Nguyen MD Apc is 1457032732, a Type 2 (organization) record in the CMS NPPES registry.

Psychiatry Physician in San Diego, CA · enumerated 2023 · authorized official Mai Hoang, Ceo.

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

National Provider Identifier

1457032732

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Registry record

Entity type Organization (Type 2)

Legal business name D William Nguyen MD Apc

Practice address 9855 Erma Rd Ste 133, San Diego, CA, 92131

Phone (760) 656-5523

Fax (619) 280-5800

Enumeration date Jul 28, 2023

Last updated in NPPES Jun 17, 2024

Taxonomy & classification

2084N0400X Neurology Physician Allopathic & Osteopathic Physicians Secondary

2084P0800X Psychiatry Physician Allopathic & Osteopathic Physicians Primary

Authorized official

Name Mai Hoang

Title Ceo

Phone (858) 349-3760

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

What is the NPI number for D William Nguyen MD Apc?

The NPI for D William Nguyen MD Apc is 1457032732, a Type 2 (organization) record in the CMS NPPES registry.

Who is the authorized official for D William Nguyen MD Apc?

NPPES lists Mai Hoang (Ceo) as the authorized official for this organization.

Providers at this address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2024-06-17.