Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Alexander Michael Bui, PHARMD

Pharmacist in San Antonio, TX · enumerated 2021.

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

National Provider Identifier

1821752585

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Registry record

Entity type Individual (Type 1)

Name Dr. Alexander Michael Bui

Credential PHARMD

Sex Male

Practice address 4502 Medical Dr, San Antonio, TX, 78229

Phone (210) 358-4000

Enumeration date Oct 27, 2021

Last updated in NPPES Oct 27, 2021

Taxonomy & licenses

183500000X Pharmacist Pharmacy Service Providers · License 69021 (TX) Primary

PHARMD · Doctor of Pharmacy: A licensed pharmacist with a professional doctorate in pharmacy. About the PHARMD 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

Where does Alexander Bui practice?

The practice location on file with NPPES is in San Antonio, TX. Providers can have multiple locations; NPPES lists the primary practice address.

What is the NPI number for Alexander Bui?

The National Provider Identifier (NPI) for Alexander Bui is 1821752585, 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 2021-10-27.