Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Alexander Young-Shyang Guo, PHARM.D.

Pharmacist in San Diego, CA · enumerated 2016.

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

National Provider Identifier

1326406166

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Registry record

Entity type Individual (Type 1)

Name Alexander Young-Shyang Guo

Credential PHARM.D.

Sex Male

Practice address 4647 Zion Ave, San Diego, CA, 92120

Phone (909) 618-7492

Enumeration date Feb 8, 2016

Last updated in NPPES Feb 8, 2016

Taxonomy & licenses

183500000X Pharmacist Pharmacy Service Providers · License RPH 71159 (CA) Primary

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

Other identifiers

Identifier	Type	State	Issuer
RPH 71159	Other	CA	CA BOARD OF PHARMACY

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

How do I verify Alexander Guo's NPI record?

Cross-check NPI 1326406166 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1326406166 active?

Yes, as of the latest NPPES snapshot, NPI 1326406166 is active (record last updated 2016-02-08).

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2016-02-08.