Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Alejandro Guan

Pharmacist in Brentwood, CA · enumerated 2016.

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

National Provider Identifier

1164972121

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Registry record

Entity type Individual (Type 1)

Name Alejandro Guan

Sex Male

Practice address 2643 Presidio Dr, Brentwood, CA, 94513

Phone (925) 481-4921

Enumeration date Oct 13, 2016

Last updated in NPPES Oct 13, 2016

Taxonomy & licenses

183500000X Pharmacist Pharmacy Service Providers · License 75430 (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.

Read the full guide → Validate an NPI →

Frequently asked questions

Is NPI 1164972121 active?

Yes, as of the latest NPPES snapshot, NPI 1164972121 is active (record last updated 2016-10-13).

How do I verify Alejandro Guan's NPI record?

Cross-check NPI 1164972121 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2016-10-13.